Small power supply grid-connected line intertripping device

Abstract

The invention relates to a grid-connected small power supply intertripping device, and belongs to the technical field of power system control, the device comprises a hard contact expansion circuit and a tripping outlet circuit, the hard contact expansion circuit is used for accessing standby node signals of each tripping switch of a transformer protection device, and the hard contact expansion circuit is in signal connection with the tripping outlet circuit; and the tripping outlet circuit is connected with a circuit breaker on each small power supply grid-connected line. A limited number of standby outlets of the transformer protection device are expanded to form more intertripping outlets, so that the intertripping requirements under different operation modes in a multi-path small power supply grid-connected scene are met, and the problem that the number of standby middle and low voltage side protection outlet contacts of the transformer protection device is small is solved; when many grid-connected small power supplies exist on a low-voltage side bus in a transformer substation, the small power supplies can be timely and effectively cut off from a system, and safe and stable operation of a power system is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of power system control, and in particular to a small power grid-connected line switching device. Background Art

[0002] With the construction and development of new power systems, distributed renewable energy has been more and more widely used due to its advantages of clean, low-carbon, flexible and efficient. The installed capacity and grid-connected capacity of new energy sources have increased year by year. In the common grid-connected mode, the new energy power generation device is connected to the medium (low) voltage side AC bus of the nearest substation through a power electronic converter, and transmits power to the main grid as a small power source. Unlike the pure load outgoing line on the bus, when a small power line fails, in addition to the main grid side, the small power side will also provide short-circuit current to the fault point. If the switch cannot be tripped in time, it will further endanger the safety of the equipment. When the upper power supply of the small power grid-connected bus is lost due to a fault, the small power source will form an island operation mode with other loads on the bus. Due to the loss of the voltage reference of the main grid, the power supply quality of the small power source will be significantly reduced, and it will not be able to provide reliable power supply to users. At the same time, the small power source will also provide a certain value of residual voltage to the bus where it is located, interfering with the correct operation of the standby automatic transfer device. Therefore, when various situations cause the small power grid-connected bus to lose pressure, the small power grid-connected line switch is usually tripped by joint cutting to reduce the degree of equipment damage and ensure the power supply quality.

[0003] In the power system, "interlocking" is a protection measure, which is usually used to quickly cut off the small power supply line when a small power supply fails or an abnormal situation occurs in the power system, so as to protect the safe and stable operation of the power system. Interlocking is usually achieved by transformer protection devices, which can detect abnormal conditions in the power system and quickly issue tripping commands to achieve the interlocking function.

[0004] There are fewer spare medium and low voltage side protection outlet contacts in the existing transformer protection device. When there are many small grid-connected power sources on the medium and low voltage side busbars of the substation, the device cannot provide sufficient disconnection outlets. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a small power grid-connected line interlocking device, which utilizes a limited number of transformer protection device outlets to expand the number of interlocking outlets to meet the interlocking requirements under different operating modes in the scenario of multiple small power grid-connected lines.

[0006] In order to achieve the above object, the present invention provides the following technical solutions: A small power grid-connected line joint cutting device, the device comprising a hard contact expansion circuit and a tripping outlet circuit; The hard contact extension circuit includes a first hard contact extension branch, a second hard contact extension branch, a third hard contact extension branch, a fourth hard contact extension branch, a fifth hard contact extension branch and a sixth hard contact extension branch connected in parallel with each other; The first hard-contact extension branch is connected in series with a mid-trip switch outlet of a transformer protection device, the second hard-contact extension branch is connected in series with a mid-trip busbar outlet of a transformer protection device, the third hard-contact extension branch is connected in series with a low-trip switch outlet of a transformer protection device, the fourth hard-contact extension branch is connected in series with a low-trip sectional outlet of a transformer protection device, the fifth hard-contact extension branch is connected in series with a first standby outlet of a transformer protection device, and the sixth hard-contact extension branch is connected in series with a second standby outlet of a transformer protection device; Four heavy-duty relays are connected in series in each hard-contact extension branch of the hard-contact extension circuit; The heavy-duty relays connected in series in each hard-contact extension branch have two normally open contacts; The tripping exit circuit includes eight grid-connected lines; Each grid-connected line is connected in series with a basic tripping circuit; the basic tripping circuit includes six basic tripping branches connected in parallel; each of the six basic tripping branches is connected in series with a pressure plate switch, and each of the six basic tripping branches is also connected in series with a normally open contact of a heavy-duty relay; For each grid-connected line, one end of the grid-connected line is used for the access of small power sources, and the other end is used for access to the grid through a circuit breaker; The transformer protection device is electrically connected to the mid-trip switch outlet, the mid-trip busbar outlet, the low-trip switch outlet, the low-trip section outlet, the first spare outlet, the second spare outlet and each circuit breaker.

[0007] Furthermore, the first hard contact extension branch is connected in series with a heavy-duty relay ZJ11, a heavy-duty relay ZJ12, a heavy-duty relay ZJ13, and a heavy-duty relay ZJ14; The second hard contact extension branch is connected in series with a heavy-duty relay ZJ21, a heavy-duty relay ZJ22, a heavy-duty relay ZJ23, and a heavy-duty relay ZJ24; The third hard contact extension branch is connected in series with a heavy-duty relay ZJ31, a heavy-duty relay ZJ32, a heavy-duty relay ZJ33, and a heavy-duty relay ZJ34; The fourth hard contact extension branch is connected in series with a heavy-duty relay ZJ41, a heavy-duty relay ZJ42, a heavy-duty relay ZJ43, and a heavy-duty relay ZJ44; The fifth hard contact extension branch is connected in series with a heavy-duty relay ZJ51, a heavy-duty relay ZJ52, a heavy-duty relay ZJ53, and a heavy-duty relay ZJ54; The sixth hard contact extension branch is connected in series with a heavy-duty relay ZJ61, a heavy-duty relay ZJ62, a heavy-duty relay ZJ63, and a heavy-duty relay ZJ64.

[0008] Furthermore, the hard contact expansion circuit is powered by a DC110V power supply.

[0009] Further, the first grid-connected line comprises: a first basic tripping circuit and a pressure plate switch 1CLP1, the first basic tripping circuit and the pressure plate switch 1CLP1 are connected in series; The second grid-connected line includes: a second basic tripping circuit and a pressure plate switch 1CLP2, the second basic tripping circuit and the pressure plate switch 1CLP2 are connected in series; The third grid-connected line includes: a third basic tripping circuit and a pressure plate switch 1CLP3, the third basic tripping circuit and the pressure plate switch 1CLP3 are connected in series; The fourth grid-connected line includes: a fourth basic tripping circuit and a pressure plate switch 1CLP4, the fourth basic tripping circuit and the pressure plate switch 1CLP4 are connected in series; The fifth grid-connected line includes: a fifth basic tripping circuit and a pressure plate switch 1CLP5, the fifth basic tripping circuit and the pressure plate switch 1CLP5 are connected in series; The sixth grid-connected line includes: a sixth basic tripping circuit and a pressure plate switch 1CLP6, the sixth basic tripping circuit and the pressure plate switch 1CLP6 are connected in series; The seventh grid-connected line includes: a seventh basic tripping circuit and a pressure plate switch 1CLP7, the seventh basic tripping circuit and the pressure plate switch 1CLP7 are connected in series; The eighth grid-connected line includes: an eighth basic tripping circuit and a pressure plate switch 1CLP8, and the eighth basic tripping circuit and the pressure plate switch 1CLP8 are connected in series.

[0010] Further, the first basic tripping circuit includes a first basic tripping branch, a second basic tripping branch, a third basic tripping branch, a fourth basic tripping branch, a fifth basic tripping branch and a sixth basic tripping branch, and the first basic tripping branch, the second basic tripping branch, the third basic tripping branch, the fourth basic tripping branch, the fifth basic tripping branch and the sixth basic tripping branch are connected in parallel and in series with the pressure plate switch 1CLP1; The second basic tripping circuit includes a seventh basic tripping branch, an eighth basic tripping branch, a ninth basic tripping branch, a tenth basic tripping branch, an eleventh basic tripping branch and a twelfth basic tripping branch, and the seventh basic tripping branch, the eighth basic tripping branch, the ninth basic tripping branch, the tenth basic tripping branch, the eleventh basic tripping branch and the twelfth basic tripping branch are connected in parallel and then connected in series with the pressure plate switch 1CLP2; The third basic tripping circuit includes a thirteenth basic tripping branch, a fourteenth basic tripping branch, a fifteenth basic tripping branch, a sixteenth basic tripping branch, a seventeenth basic tripping branch and an eighteenth basic tripping branch, and the thirteenth basic tripping branch, the fourteenth basic tripping branch, the fifteenth basic tripping branch, the sixteenth basic tripping branch, the seventeenth basic tripping branch and the eighteenth basic tripping branch are connected in parallel and in series with the pressure plate switch 1CLP3; The fourth basic tripping circuit includes a nineteenth basic tripping branch, a twentieth basic tripping branch, a twenty-first basic tripping branch, a twenty-second basic tripping branch, a twenty-third basic tripping branch and a twenty-fourth basic tripping branch, and the nineteenth basic tripping branch, the twentieth basic tripping branch, the twenty-first basic tripping branch, the twenty-second basic tripping branch, the twenty-third basic tripping branch and the twenty-fourth basic tripping branch are connected in parallel and in series with the pressure plate switch 1CLP4; The fifth basic tripping circuit includes a twenty-fifth basic tripping branch, a twenty-sixth basic tripping branch, a twenty-seventh basic tripping branch, a twenty-eighth basic tripping branch, a twenty-ninth basic tripping branch and a thirtieth basic tripping branch, and the twenty-fifth basic tripping branch, the twenty-sixth basic tripping branch, the twenty-seventh basic tripping branch, the twenty-eighth basic tripping branch, the twenty-ninth basic tripping branch and the thirtieth basic tripping branch are connected in parallel and then connected in series with the pressure plate switch 1CLP5; The sixth basic tripping circuit includes a thirty-first basic tripping branch, a thirty-second basic tripping branch, a thirty-third basic tripping branch, a thirty-fourth basic tripping branch, a thirty-fifth basic tripping branch and a thirty-sixth basic tripping branch, and the thirty-first basic tripping branch, the thirty-second basic tripping branch, the thirty-third basic tripping branch, the thirty-fourth basic tripping branch, the thirty-fifth basic tripping branch and the thirty-sixth basic tripping branch are connected in parallel and in series with the pressure plate switch 1CLP6; The seventh basic tripping circuit includes a thirty-seventh basic tripping branch, a thirty-eighth basic tripping branch, a thirty-ninth basic tripping branch, a fortieth basic tripping branch, a forty-first basic tripping branch and a forty-second basic tripping branch, and the thirty-seventh basic tripping branch, the thirty-eighth basic tripping branch, the thirty-ninth basic tripping branch, the fortieth basic tripping branch, the forty-first basic tripping branch and the forty-second basic tripping branch are connected in parallel and in series with the pressure plate switch 1CLP7; The eighth basic tripping circuit includes the forty-third basic tripping branch, the forty-fourth basic tripping branch, the forty-fifth basic tripping branch, the forty-sixth basic tripping branch, the forty-seventh basic tripping branch and the forty-eighth basic tripping branch. The forty-third basic tripping branch, the forty-fourth basic tripping branch, the forty-fifth basic tripping branch, the forty-sixth basic tripping branch, the forty-seventh basic tripping branch and the forty-eighth basic tripping branch are connected in parallel and connected in series with the pressure plate switch 1CLP8.

[0011] Furthermore, in the first grid-connected line: The first basic tripping branch includes a first contact ZJ11-1 of a heavy-duty relay ZJ11 and a pressure plate switch 1CLP1-1, a first end of the first contact ZJ11-1 of the heavy-duty relay ZJ11 is connected to the pressure plate switch 1CLP1, and a second end of the first contact ZJ11-1 of the heavy-duty relay ZJ11 is connected to a first end of the pressure plate switch 1CLP1-1; The second basic tripping branch includes a first contact ZJ21-1 of a heavy relay ZJ21 and a pressure plate switch 1CLP1-2, wherein a first end of the first contact ZJ21-1 of the heavy relay ZJ21 is connected to the pressure plate switch 1CLP1, and a second end of the first contact ZJ21-1 of the heavy relay ZJ21 is connected to a first end of the pressure plate switch 1CLP1-2; The third basic tripping branch includes a first contact ZJ31-1 of a heavy relay ZJ31 and a pressure plate switch 1CLP1-3, wherein a first end of the first contact ZJ31-1 of the heavy relay ZJ31 is connected to the pressure plate switch 1CLP1, and a second end of the first contact ZJ31-1 of the heavy relay ZJ31 is connected to a first end of the pressure plate switch 1CLP1-3; The fourth basic tripping branch includes a first contact ZJ41-1 of a heavy relay ZJ41 and a pressure plate switch 1CLP1-4, a first end of the first contact ZJ41-1 of the heavy relay ZJ41 is connected to the pressure plate switch 1CLP1, and a second end of the first contact ZJ41-1 of the heavy relay ZJ41 is connected to a first end of the pressure plate switch 1CLP1-4; The fifth basic tripping branch includes a first contact ZJ51-1 of a heavy relay ZJ51 and a pressure plate switch 1CLP1-5, a first end of the first contact ZJ51-1 of the heavy relay ZJ51 is connected to the pressure plate switch 1CLP1, and a second end of the first contact ZJ51-1 of the heavy relay ZJ51 is connected to a first end of the pressure plate switch 1CLP1-5; The sixth basic tripping branch includes the first contact ZJ61-1 of the heavy relay ZJ61 and the pressure plate switch 1CLP1-6, the first end of the first contact ZJ61-1 of the heavy relay ZJ61 is connected to the pressure plate switch 1CLP1, and the second end of the first contact ZJ61-1 of the heavy relay ZJ61 is connected to the first end of the pressure plate switch 1CLP1-6; In the second grid-connected line: The seventh basic tripping branch includes the second contact ZJ11-2 of the heavy relay ZJ11 and the pressure plate switch 1CLP2-1, the first end of the second contact ZJ11-2 of the heavy relay ZJ11 is connected to the pressure plate switch 1CLP2, and the second end of the second contact ZJ11-2 of the heavy relay ZJ11 is connected to the first end of the pressure plate switch 1CLP2-1; The eighth basic tripping branch includes the second contact ZJ21-2 of the heavy relay ZJ21 and the pressure plate switch 1CLP2-2, the first end of the second contact ZJ21-2 of the heavy relay ZJ21 is connected to the pressure plate switch 1CLP2, and the second end of the second contact ZJ21-2 of the heavy relay ZJ21 is connected to the first end of the pressure plate switch 1CLP2-2; The ninth basic tripping branch includes the second contact ZJ31-2 of the heavy relay ZJ31 and the pressure plate switch 1CLP2-3, the first end of the second contact ZJ31-2 of the heavy relay ZJ31 is connected to the pressure plate switch 1CLP2, and the second end of the second contact ZJ31-2 of the heavy relay ZJ31 is connected to the first end of the pressure plate switch 1CLP2-3; The tenth basic tripping branch includes the second contact ZJ41-2 of the heavy relay ZJ41 and the pressure plate switch 1CLP2-4, the first end of the second contact ZJ41-2 of the heavy relay ZJ41 is connected to the pressure plate switch 1CLP2, and the second end of the second contact ZJ41-2 of the heavy relay ZJ41 is connected to the first end of the pressure plate switch 1CLP2-4; The eleventh basic tripping branch includes the second contact ZJ51-2 of the heavy relay ZJ51 and the pressure plate switch 1CLP2-5, the first end of the second contact ZJ51-2 of the heavy relay ZJ51 is connected to the pressure plate switch 1CLP2, and the second end of the second contact ZJ51-2 of the heavy relay ZJ51 is connected to the first end of the pressure plate switch 1CLP2-5; The twelfth basic tripping branch includes the second contact ZJ61-2 of the heavy relay ZJ61 and the pressure plate switch 1CLP2-6, the first end of the second contact ZJ61-2 of the heavy relay ZJ61 is connected to the pressure plate switch 1CLP2, and the second end of the second contact ZJ61-2 of the heavy relay ZJ61 is connected to the first end of the pressure plate switch 1CLP2-6; In the third grid-connected line: The thirteenth basic tripping branch includes a first contact ZJ12-1 of a heavy-duty relay ZJ12 and a pressure plate switch 1CLP3-1, wherein a first end of the first contact ZJ12-1 of the heavy-duty relay ZJ12 is connected to the pressure plate switch 1CLP3, and a second end of the first contact ZJ12-1 of the heavy-duty relay ZJ12 is connected to a first end of the pressure plate switch 1CLP3-1; The fourteenth basic tripping branch includes a first contact ZJ22-1 of a heavy-duty relay ZJ22 and a pressure plate switch 1CLP3-2, wherein a first end of the first contact ZJ22-1 of the heavy-duty relay ZJ22 is connected to the pressure plate switch 1CLP3, and a second end of the first contact ZJ22-1 of the heavy-duty relay ZJ22 is connected to a first end of the pressure plate switch 1CLP3-2; The fifteenth basic tripping branch includes a first contact ZJ32-1 of a heavy-duty relay ZJ32 and a pressure plate switch 1CLP3-3, wherein a first end of the first contact ZJ32-1 of the heavy-duty relay ZJ32 is connected to the pressure plate switch 1CLP3, and a second end of the first contact ZJ32-1 of the heavy-duty relay ZJ32 is connected to a first end of the pressure plate switch 1CLP3-3; The sixteenth basic tripping branch includes a first contact ZJ42-1 of a heavy-duty relay ZJ42 and a pressure plate switch 1CLP3-4, wherein a first end of the first contact ZJ42-1 of the heavy-duty relay ZJ42 is connected to the pressure plate switch 1CLP3, and a second end of the first contact ZJ42-1 of the heavy-duty relay ZJ42 is connected to a first end of the pressure plate switch 1CLP3-4; The seventeenth basic tripping branch includes a first contact ZJ52-1 of a heavy-duty relay ZJ52 and a pressure plate switch 1CLP3-5, wherein a first end of the first contact ZJ52-1 of the heavy-duty relay ZJ52 is connected to the pressure plate switch 1CLP3, and a second end of the first contact ZJ52-1 of the heavy-duty relay ZJ52 is connected to a first end of the pressure plate switch 1CLP3-5; The eighteenth basic tripping branch includes the first contact ZJ62-1 of the heavy relay ZJ62 and the pressure plate switch 1CLP3-6, the first end of the first contact ZJ62-1 of the heavy relay ZJ62 is connected to the pressure plate switch 1CLP3, and the second end of the first contact ZJ62-1 of the heavy relay ZJ62 is connected to the first end of the pressure plate switch 1CLP3-6; In the fourth grid-connected line: The nineteenth basic tripping branch includes the second contact ZJ12-2 of the heavy relay ZJ12 and the pressure plate switch 1CLP4-1, the first end of the second contact ZJ12-2 of the heavy relay ZJ12 is connected to the pressure plate switch 1CLP4, and the second end of the second contact ZJ12-2 of the heavy relay ZJ12 is connected to the first end of the pressure plate switch 1CLP4-1; The twentieth basic tripping branch includes the second contact ZJ22-2 of the heavy relay ZJ22 and the pressure plate switch 1CLP4-2, the first end of the second contact ZJ22-2 of the heavy relay ZJ22 is connected to the pressure plate switch 1CLP4, and the second end of the second contact ZJ22-2 of the heavy relay ZJ22 is connected to the first end of the pressure plate switch 1CLP4-2; The twenty-first basic tripping branch includes the second contact ZJ32-2 of the heavy relay ZJ32 and the pressure plate switch 1CLP4-3, the first end of the second contact ZJ32-2 of the heavy relay ZJ32 is connected to the pressure plate switch 1CLP4, and the second end of the second contact ZJ32-2 of the heavy relay ZJ32 is connected to the first end of the pressure plate switch 1CLP4-3; The twenty-second basic tripping branch includes the second contact ZJ42-2 of the heavy relay ZJ42 and the pressure plate switch 1CLP4-4, the first end of the second contact ZJ42-2 of the heavy relay ZJ42 is connected to the pressure plate switch 1CLP4, and the second end of the second contact ZJ42-2 of the heavy relay ZJ42 is connected to the first end of the pressure plate switch 1CLP4-4; The twenty-third basic tripping branch includes the second contact ZJ52-2 of the heavy relay ZJ52 and the pressure plate switch 1CLP4-5, the first end of the second contact ZJ52-2 of the heavy relay ZJ52 is connected to the pressure plate switch 1CLP4, and the second end of the second contact ZJ52-2 of the heavy relay ZJ52 is connected to the first end of the pressure plate switch 1CLP4-5; The twenty-fourth basic tripping branch includes the second contact ZJ62-2 of the heavy relay ZJ62 and the pressure plate switch 1CLP4-6, the first end of the second contact ZJ62-2 of the heavy relay ZJ62 is connected to the pressure plate switch 1CLP4, and the second end of the second contact ZJ62-2 of the heavy relay ZJ62 is connected to the first end of the pressure plate switch 1CLP4-6; In the fifth grid-connected line: The twenty-fifth basic tripping branch includes the first contact ZJ13-1 of the heavy relay ZJ13 and the pressure plate switch 1CLP5-1, the first end of the first contact ZJ13-1 of the heavy relay ZJ13 is connected to the pressure plate switch 1CLP5, and the second end of the first contact ZJ13-1 of the heavy relay ZJ13 is connected to the first end of the pressure plate switch 1CLP5-1; The twenty-sixth basic tripping branch includes the first contact ZJ23-1 of the heavy relay ZJ23 and the pressure plate switch 1CLP5-2, the first end of the first contact ZJ23-1 of the heavy relay ZJ23 is connected to the pressure plate switch 1CLP5, and the second end of the first contact ZJ23-1 of the heavy relay ZJ23 is connected to the first end of the pressure plate switch 1CLP5-2; The twenty-seventh basic tripping branch includes the first contact ZJ33-1 of the heavy relay ZJ33 and the pressure plate switch 1CLP5-3, the first end of the first contact ZJ33-1 of the heavy relay ZJ33 is connected to the pressure plate switch 1CLP5, and the second end of the first contact ZJ33-1 of the heavy relay ZJ33 is connected to the first end of the pressure plate switch 1CLP5-3; The twenty-eighth basic tripping branch includes a first contact ZJ43-1 of a heavy-duty relay ZJ43 and a pressure plate switch 1CLP5-4, wherein a first end of the first contact ZJ43-1 of the heavy-duty relay ZJ43 is connected to the pressure plate switch 1CLP5, and a second end of the first contact ZJ43-1 of the heavy-duty relay ZJ43 is connected to a first end of the pressure plate switch 1CLP5-4; The twenty-ninth basic tripping branch includes a first contact ZJ53-1 of a heavy-duty relay ZJ53 and a pressure plate switch 1CLP5-5, wherein a first end of the first contact ZJ53-1 of the heavy-duty relay ZJ53 is connected to the pressure plate switch 1CLP5, and a second end of the first contact ZJ53-1 of the heavy-duty relay ZJ53 is connected to a first end of the pressure plate switch 1CLP5-5; The thirtieth basic tripping branch includes the first contact ZJ63-1 of the heavy relay ZJ63 and the pressure plate switch 1CLP5-6, the first end of the first contact ZJ63-1 of the heavy relay ZJ63 is connected to the pressure plate switch 1CLP5, and the second end of the first contact ZJ63-1 of the heavy relay ZJ63 is connected to the first end of the pressure plate switch 1CLP5-6; In the sixth grid-connected line: The thirty-first basic tripping branch includes the second contact ZJ13-2 of the heavy relay ZJ13 and the pressure plate switch 1CLP6-1, the first end of the second contact ZJ13-2 of the heavy relay ZJ13 is connected to the pressure plate switch 1CLP6, and the second end of the second contact ZJ13-2 of the heavy relay ZJ13 is connected to the first end of the pressure plate switch 1CLP6-1; The thirty-second basic tripping branch includes the second contact ZJ23-2 of the heavy relay ZJ23 and the pressure plate switch 1CLP6-2, the first end of the second contact ZJ23-2 of the heavy relay ZJ23 is connected to the pressure plate switch 1CLP6, and the second end of the second contact ZJ23-2 of the heavy relay ZJ23 is connected to the first end of the pressure plate switch 1CLP6-2; The thirty-third basic tripping branch includes the second contact ZJ33-2 of the heavy relay ZJ33 and the pressure plate switch 1CLP6-3, the first end of the second contact ZJ33-2 of the heavy relay ZJ33 is connected to the pressure plate switch 1CLP6, and the second end of the second contact ZJ33-2 of the heavy relay ZJ33 is connected to the first end of the pressure plate switch 1CLP6-3; The thirty-fourth basic tripping branch includes the second contact ZJ43-2 of the heavy relay ZJ43 and the pressure plate switch 1CLP6-4, the first end of the second contact ZJ43-2 of the heavy relay ZJ43 is connected to the pressure plate switch 1CLP6, and the second end of the second contact ZJ43-2 of the heavy relay ZJ43 is connected to the first end of the pressure plate switch 1CLP6-4; The thirty-fifth basic tripping branch includes the second contact ZJ53-2 of the heavy relay ZJ53 and the pressure plate switch 1CLP6-5, the first end of the second contact ZJ53-2 of the heavy relay ZJ53 is connected to the pressure plate switch 1CLP6, and the second end of the second contact ZJ53-2 of the heavy relay ZJ53 is connected to the first end of the pressure plate switch 1CLP6-5; The thirty-sixth basic tripping branch includes the second contact ZJ63-2 of the heavy relay ZJ63 and the pressure plate switch 1CLP6-6, the first end of the second contact ZJ63-2 of the heavy relay ZJ63 is connected to the pressure plate switch 1CLP6, and the second end of the second contact ZJ63-2 of the heavy relay ZJ63 is connected to the first end of the pressure plate switch 1CLP6-6; In the seventh grid-connected line: The thirty-seventh basic tripping branch includes the first contact ZJ14-1 of the heavy relay ZJ14 and the pressure plate switch 1CLP7-1, the first end of the first contact ZJ14-1 of the heavy relay ZJ14 is connected to the pressure plate switch 1CLP7, and the second end of the first contact ZJ14-1 of the heavy relay ZJ14 is connected to the first end of the pressure plate switch 1CLP7-1; The thirty-eighth basic tripping branch includes the first contact ZJ24-1 of the heavy relay ZJ24 and the pressure plate switch 1CLP7-2, the first end of the first contact ZJ24-1 of the heavy relay ZJ24 is connected to the pressure plate switch 1CLP7, and the second end of the first contact ZJ24-1 of the heavy relay ZJ24 is connected to the first end of the pressure plate switch 1CLP7-2; The thirty-ninth basic tripping branch includes the first contact ZJ34-1 of the heavy relay ZJ34 and the pressure plate switch 1CLP7-3, the first end of the first contact ZJ34-1 of the heavy relay ZJ34 is connected to the pressure plate switch 1CLP7, and the second end of the first contact ZJ34-1 of the heavy relay ZJ34 is connected to the first end of the pressure plate switch 1CLP7-3; The fortieth basic tripping branch includes a first contact ZJ44-1 of a heavy-duty relay ZJ44 and a pressure plate switch 1CLP7-4, wherein a first end of the first contact ZJ44-1 of the heavy-duty relay ZJ44 is connected to the pressure plate switch 1CLP7, and a second end of the first contact ZJ44-1 of the heavy-duty relay ZJ44 is connected to a first end of the pressure plate switch 1CLP7-4; The forty-first basic tripping branch includes the first contact ZJ54-1 of the heavy-duty relay ZJ54 and the pressure plate switch 1CLP7-5, the first end of the first contact ZJ54-1 of the heavy-duty relay ZJ54 is connected to the pressure plate switch 1CLP7, and the second end of the first contact ZJ54-1 of the heavy-duty relay ZJ54 is connected to the first end of the pressure plate switch 1CLP7-5; The forty-second basic tripping branch includes the first contact ZJ64-1 of the heavy relay ZJ64 and the pressure plate switch 1CLP7-6, the first end of the first contact ZJ64-1 of the heavy relay ZJ64 is connected to the pressure plate switch 1CLP7, and the second end of the first contact ZJ64-1 of the heavy relay ZJ64 is connected to the first end of the pressure plate switch 1CLP7-6; In the eighth grid-connected line: The forty-third basic tripping branch includes the second contact ZJ14-2 of the heavy relay ZJ14 and the pressure plate switch 1CLP8-1, the first end of the second contact ZJ14-2 of the heavy relay ZJ14 is connected to the pressure plate switch 1CLP8, and the second end of the second contact ZJ14-2 of the heavy relay ZJ14 is connected to the first end of the pressure plate switch 1CLP8-1; The forty-fourth basic tripping branch includes the second contact ZJ24-2 of the heavy relay ZJ24 and the pressure plate switch 1CLP8-2, the first end of the second contact ZJ24-2 of the heavy relay ZJ24 is connected to the pressure plate switch 1CLP8, and the second end of the second contact ZJ24-2 of the heavy relay ZJ24 is connected to the first end of the pressure plate switch 1CLP8-2; The forty-fifth basic tripping branch includes the second contact ZJ34-2 of the heavy relay ZJ34 and the pressure plate switch 1CLP8-3, the first end of the second contact ZJ34-2 of the heavy relay ZJ34 is connected to the pressure plate switch 1CLP8, and the second end of the second contact ZJ34-2 of the heavy relay ZJ34 is connected to the first end of the pressure plate switch 1CLP8-3; The forty-sixth basic tripping branch includes the second contact ZJ44-2 of the heavy relay ZJ44 and the pressure plate switch 1CLP8-4, the first end of the second contact ZJ44-2 of the heavy relay ZJ44 is connected to the pressure plate switch 1CLP8, and the second end of the second contact ZJ44-2 of the heavy relay ZJ44 is connected to the first end of the pressure plate switch 1CLP8-4; The forty-seventh basic tripping branch includes the second contact ZJ54-2 of the heavy relay ZJ54 and the pressure plate switch 1CLP8-5, the first end of the second contact ZJ54-2 of the heavy relay ZJ54 is connected to the pressure plate switch 1CLP8, and the second end of the second contact ZJ54-2 of the heavy relay ZJ54 is connected to the first end of the pressure plate switch 1CLP8-5; The forty-eighth basic tripping branch includes the second contact ZJ64-2 of the heavy-duty relay ZJ64 and the pressure plate switch 1CLP8-6. The first end of the second contact ZJ64-2 of the heavy-duty relay ZJ64 is connected to the pressure plate switch 1CLP8, and the second end of the second contact ZJ64-2 of the heavy-duty relay ZJ64 is connected to the first end of the pressure plate switch 1CLP8-6.

[0012] Furthermore, the device also includes an operation panel, a pressure plate switch 1CLP1-1, a pressure plate switch 1CLP1-2, a pressure plate switch 1CLP1-3, a pressure plate switch 1CLP1-4, a pressure plate switch 1CLP1-5, a pressure plate switch 1CLP1-6, a pressure plate switch 1CLP2-1, a pressure plate switch 1CLP2-2, a pressure plate switch 1CLP2-3, a pressure plate switch 1CLP2-4, a pressure plate switch 1CLP2 ...6, a pressure plate switch 1CLP2-1, a pressure plate switch 1CLP2-2, a pressure plate switch 1CLP2-3, a pressure plate switch 1CLP2-4, a pressure plate switch 1CLP2-5, a pressure plate switch 1CLP1-6, a pressure plate switch 1CLP1 Plate switch 1CLP2-6, plate switch 1CLP3-1, plate switch 1CLP3-2, plate switch 1CLP3-3, plate switch 1CLP3-4, plate switch 1CLP3-5, plate switch 1CLP3-6, plate switch 1CLP4-1, plate switch 1CLP4-2, plate switch 1CLP4-3, plate switch 1CLP4-4, plate switch 1CLP4-5, plate switch 1CLP 4-6, pressure plate switch 1CLP5-1, pressure plate switch 1CLP5-2, pressure plate switch 1CLP5-3, pressure plate switch 1CLP5-4, pressure plate switch 1CLP5-5, pressure plate switch 1CLP5-6, pressure plate switch 1CLP6-1, pressure plate switch 1CLP6-2, pressure plate switch 1CLP6-3, pressure plate switch 1CLP6-4, pressure plate switch 1CLP6-5, pressure plate switch 1CLP6-6, pressure plate Switch 1CLP7-1, pressure plate switch 1CLP7-2, pressure plate switch 1CLP7-3, pressure plate switch 1CLP7-4, pressure plate switch 1CLP7-5, pressure plate switch 1CLP7-6, pressure plate switch 1CLP8-1, pressure plate switch 1CLP8-2, pressure plate switch 1CLP8-3, pressure plate switch 1CLP8-4, pressure plate switch 1CLP8-5, and pressure plate switch 1CLP8-6 are all integrated on the operation panel.

[0013] Furthermore, a monitoring relay ZJ15 is connected in series on the first hard contact extension branch, a monitoring relay ZJ25 is connected in series on the second hard contact extension branch, a monitoring relay ZJ35 is connected in series on the third hard contact extension branch, a monitoring relay ZJ45 is connected in series on the fourth hard contact extension branch, a monitoring relay ZJ55 is connected in series on the fifth hard contact extension branch, and a monitoring relay ZJ65 is connected in series on the sixth hard contact extension branch; The device also includes a heavy-duty relay monitoring module and a pressure plate switch monitoring module; The heavy-duty relay monitoring module comprises six relay monitoring branches connected in parallel with each other, and each relay monitoring branch comprises a normally open contact and a light-emitting diode of a monitoring relay connected in series with each other; The pressure plate switch monitoring module includes 48 pressure plate switch monitoring branches connected in parallel with each other, and each pressure plate switch monitoring branch includes a pressure plate switch and a light emitting diode connected in series with each other.

[0014] Further, the heavy-duty relay monitoring module includes: a normally open contact of a monitoring relay ZJ15, a normally open contact of a monitoring relay ZJ25, a normally open contact of a monitoring relay ZJ35, a normally open contact of a monitoring relay ZJ45, a normally open contact of a monitoring relay ZJ55, a normally open contact of a monitoring relay ZJ65, a first light-emitting diode, a second light-emitting diode, a third light-emitting diode, a fourth light-emitting diode, a fifth light-emitting diode, and a sixth light-emitting diode; The pressure plate switch monitoring module includes: pressure plate switch 1CLP1-1, pressure plate switch 1CLP1-2, pressure plate switch 1CLP1-3, pressure plate switch 1CLP1-4, pressure plate switch 1CLP1-5, pressure plate switch 1CLP1-6, pressure plate switch 1CLP2-1, pressure plate switch 1CLP2-2, pressure plate switch 1CLP2-3, pressure plate switch 1CLP2-4, pressure plate switch 1CLP2-5, pressure plate switch 1CLP2-6, pressure plate switch 1CLP3-1, pressure plate switch 1CLP3-2, pressure plate switch 1CLP3-3, pressure plate switch 1CLP3-4, pressure plate switch 1CLP3-5, pressure plate switch 1CLP3-6, pressure plate switch 1CLP4-1, pressure plate switch 1CLP4- 2. Press plate switch 1CLP4-3, press plate switch 1CLP4-4, press plate switch 1CLP4-5, press plate switch 1CLP4-6, press plate switch 1CLP5-1, press plate switch 1CLP5-2, press plate switch 1CLP5-3, press plate switch 1CLP5-4, press plate switch 1CLP5-5, press plate switch 1CLP5-6, press plate switch 1CLP6-1, press plate switch 1CLP6-2, press plate switch 1CLP6-3, press plate switch 1CLP6-4, press plate switch 1CLP6-5, press plate switch 1CLP6-6, press plate switch 1CLP7-1, press plate switch 1CLP7-2, press plate switch 1CLP7-3, press plate switch 1CLP7-4, press plate switch 1CLP P7-5, platen switch 1CLP7-6, platen switch 1CLP8-1, platen switch 1CLP8-2, platen switch 1CLP8-3, platen switch 1CLP8-4, platen switch 1CLP8-5, platen switch 1CLP8-6, seventh light emitting diode, eighth light emitting diode, ninth light emitting diode, tenth light emitting diode, eleventh light emitting diode, twelfth light emitting diode, thirteenth light emitting diode, fourteenth light emitting diode, fifteenth light emitting diode, sixteenth light emitting diode, seventeenth light emitting diode, eighteenth light emitting diode, nineteenth light emitting diode, twentieth light emitting diode, twenty-first light emitting diode, twenty-second light emitting diode, twenty-third light emitting diode, twenty-fourth light emitting diode tube, the twenty-fifth light emitting diode, the twenty-sixth light emitting diode, the twenty-seventh light emitting diode, the twenty-eighth light emitting diode, the twenty-ninth light emitting diode, the thirtieth light emitting diode, the thirty-first light emitting diode, the thirty-second light emitting diode, the thirty-third light emitting diode, the thirty-third light emitting diode, the thirty-fourth light emitting diode, the thirty-fifth light emitting diode, the thirty-sixth light emitting diode, the thirty-seventh light emitting diode, the thirty-eighth light emitting diode, the thirty-ninth light emitting diode, the fortyth light emitting diode, the forty-first light emitting diode, the forty-second light emitting diode, the forty-third light emitting diode, the forty-fourth light emitting diode, the forty-fifth light emitting diode, the forty-sixth light emitting diode, the forty-seventh light emitting diode, the forty-eighth light emitting diode,the forty-ninth light emitting diode, the fiftieth light emitting diode, the fifty-first light emitting diode, the fifty-second light emitting diode, the fifty-third light emitting diode, and the fifty-fourth light emitting diode; The first end of the normally open contact of the monitoring relay ZJ15, the first end of the normally open contact of the monitoring relay ZJ25, the first end of the normally open contact of the monitoring relay ZJ35, the first end of the normally open contact of the monitoring relay ZJ45, the first end of the normally open contact of the monitoring relay ZJ55, the first end of the normally open contact of the monitoring relay ZJ65, the third end of the pressure plate switch 1CLP1-1, the third end of the pressure plate switch 1CLP1-2, the third end of the pressure plate switch 1CLP1-3, the third end of the pressure plate switch 1CLP1-4, the third end of the pressure plate switch 1CLP1-5, the third end of the pressure plate switch 1CLP1-6, the third end of the pressure plate switch 1CLP2-1 the third end of the platen switch 1CLP2-2, the third end of the platen switch 1CLP2-3, the third end of the platen switch 1CLP2-4, the third end of the platen switch 1CLP2-5, the third end of the platen switch 1CLP2-6, the third end of the platen switch 1CLP3-1, the third end of the platen switch 1CLP3-2, the third end of the platen switch 1CLP3-3, the third end of the platen switch 1CLP3-4, the third end of the platen switch 1CLP3-5, the third end of the platen switch 1CLP3-6, the third end of the platen switch 1CLP4-1, the third end of the platen switch 1CLP4-2, and the third end of the platen switch 1CLP 4-3, the third end of the pressure plate switch 1CLP4-4, the third end of the pressure plate switch 1CLP4-5, the third end of the pressure plate switch 1CLP4-6, the third end of the pressure plate switch 1CLP5-1, the third end of the pressure plate switch 1CLP5-2, the third end of the pressure plate switch 1CLP5-3, the third end of the pressure plate switch 1CLP5-4, the third end of the pressure plate switch 1CLP5-5, the third end of the pressure plate switch 1CLP5-6, the third end of the pressure plate switch 1CLP6-1, the third end of the pressure plate switch 1CLP6-2, the third end of the pressure plate switch 1CLP6-3, the third end of the pressure plate switch 1CLP6-4, and the third end of the pressure plate switch 1 The third end of CLP6-5, the third end of pressure plate switch 1CLP6-6, the third end of pressure plate switch 1CLP7-1, the third end of pressure plate switch 1CLP7-2, the third end of pressure plate switch 1CLP7-3, the third end of pressure plate switch 1CLP7-4, the third end of pressure plate switch 1CLP7-5, the third end of pressure plate switch 1CLP7-6, the third end of pressure plate switch 1CLP8-1, the third end of pressure plate switch 1CLP8-2, the third end of pressure plate switch 1CLP8-3, the third end of pressure plate switch 1CLP8-4, the third end of pressure plate switch 1CLP8-5, and the third end of pressure plate switch 1CLP8-6 are all connected; The second end of the normally open contact of the monitoring relay ZJ15 is connected to the anode of the first light-emitting diode, the second end of the normally open contact of the monitoring relay ZJ25 is connected to the anode of the second light-emitting diode, the second end of the normally open contact of the monitoring relay ZJ35 is connected to the anode of the third light-emitting diode, the second end of the normally open contact of the monitoring relay ZJ45 is connected to the anode of the fourth light-emitting diode, the second end of the normally open contact of the monitoring relay ZJ55 is connected to the anode of the fifth light-emitting diode, the second end of the normally open contact of the monitoring relay ZJ65 is connected to the anode of the sixth light-emitting diode, the fourth end of the pressure plate switch 1CLP1-1 is connected to the anode of the seventh light-emitting diode, the fourth end of the pressure plate switch 1CLP1-2 is connected to the anode of the eighth light-emitting diode The fourth end of the pressure plate switch 1CLP1-3 is connected to the anode of the ninth light-emitting diode, the fourth end of the pressure plate switch 1CLP1-4 is connected to the anode of the tenth light-emitting diode, the fourth end of the pressure plate switch 1CLP1-5 is connected to the anode of the eleventh light-emitting diode, the fourth end of the pressure plate switch 1CLP1-6 is connected to the anode of the twelfth light-emitting diode, the fourth end of the pressure plate switch 1CLP2-1 is connected to the anode of the thirteenth light-emitting diode, the fourth end of the pressure plate switch 1CLP2-2 is connected to the anode of the fourteenth light-emitting diode, the fourth end of the pressure plate switch 1CLP2-3 is connected to the anode of the fifteenth light-emitting diode, the fourth end of the pressure plate switch 1CLP2-4 is connected to the anode of the sixteenth light-emitting diode, and ...1-2 is connected to the anode of the 15th light-emitting diode. The fourth end of the plate switch 1CLP2-5 is connected to the anode of the seventeenth light-emitting diode, the fourth end of the plate switch 1CLP2-6 is connected to the anode of the eighteenth light-emitting diode, the fourth end of the plate switch 1CLP3-1 is connected to the anode of the nineteenth light-emitting diode, the fourth end of the plate switch 1CLP3-2 is connected to the anode of the twentieth light-emitting diode, the fourth end of the plate switch 1CLP3-3 is connected to the anode of the twenty-first light-emitting diode, the fourth end of the plate switch 1CLP3-4 is connected to the anode of the twenty-second light-emitting diode, the fourth end of the plate switch 1CLP3-5 is connected to the anode of the twenty-third light-emitting diode, the fourth end of the plate switch 1CLP3-6 is connected to the anode of the twenty-fourth light-emitting diode, and the plate The fourth end of the switch 1CLP4-1 is connected to the anode of the twenty-fifth light-emitting diode, the fourth end of the pressure plate switch 1CLP4-2 is connected to the anode of the twenty-sixth light-emitting diode, the fourth end of the pressure plate switch 1CLP4-3 is connected to the anode of the twenty-seventh light-emitting diode, the fourth end of the pressure plate switch 1CLP4-4 is connected to the anode of the twenty-eighth light-emitting diode, the fourth end of the pressure plate switch 1CLP4-5 is connected to the anode of the twenty-ninth light-emitting diode, the fourth end of the pressure plate switch 1CLP4-6 is connected to the anode of the thirtieth light-emitting diode, the fourth end of the pressure plate switch 1CLP5-1 is connected to the anode of the thirty-first light-emitting diode, and the fourth end of the pressure plate switch 1CLP5-2 is connected to the anode of the thirty-second light-emitting diode.The fourth end of the pressure plate switch 1CLP5-3 is connected to the anode of the thirty-third light-emitting diode, the fourth end of the pressure plate switch 1CLP5-4 is connected to the anode of the thirty-fourth light-emitting diode, the fourth end of the pressure plate switch 1CLP5-5 is connected to the anode of the thirty-fifth light-emitting diode, the fourth end of the pressure plate switch 1CLP5-6 is connected to the anode of the thirty-sixth light-emitting diode, the fourth end of the pressure plate switch 1CLP6-1 is connected to the anode of the thirty-seventh light-emitting diode, the fourth end of the pressure plate switch 1CLP6-2 is connected to the anode of the thirty-eighth light-emitting diode, the fourth end of the pressure plate switch 1CLP6-3 is connected to the anode of the thirty-ninth light-emitting diode, the fourth end of the pressure plate switch 1CLP6-4 is connected to the anode of the fortieth light-emitting diode, the fourth end of the pressure plate switch 1CLP6-5 is connected to the anode of the forty-first light-emitting diode, the fourth end of the pressure plate switch 1CLP6-6 is connected to the anode of the forty-second light-emitting diode, and the fourth end of the pressure plate switch 1CLP7-1 is connected to the anode of the forty-third light-emitting diode , the fourth end of the pressure plate switch 1CLP7-2 is connected to the anode of the forty-fourth light-emitting diode, the fourth end of the pressure plate switch 1CLP7-3 is connected to the anode of the forty-fifth light-emitting diode, the fourth end of the pressure plate switch 1CLP7-4 is connected to the anode of the forty-sixth light-emitting diode, the fourth end of the pressure plate switch 1CLP7-5 is connected to the anode of the forty-seventh light-emitting diode, the fourth end of the pressure plate switch 1CLP7-6 is connected to the anode of the forty-eighth light-emitting diode, the fourth end of the pressure plate switch 1CLP8-1 is connected to the anode of the forty-ninth light-emitting diode, the fourth end of the pressure plate switch 1CLP8-2 is connected to the anode of the fiftieth light-emitting diode, the fourth end of the pressure plate switch 1CLP8-3 is connected to the anode of the fifty-first light-emitting diode, the fourth end of the pressure plate switch 1CLP8-4 is connected to the anode of the fifty-second light-emitting diode, the fourth end of the pressure plate switch 1CLP8-5 is connected to the anode of the fifty-third light-emitting diode, and the fourth end of the pressure plate switch 1CLP8-6 is connected to the anode of the first light-emitting diode;, the cathode of the first light emitting diode, the cathode of the second light emitting diode, the cathode of the third light emitting diode, the cathode of the fourth light emitting diode, the cathode of the fifth light emitting diode, the cathode of the sixth light emitting diode, the cathode of the seventh light emitting diode, the cathode of the eighth light emitting diode, the cathode of the ninth light emitting diode, the cathode of the tenth light emitting diode, the cathode of the eleventh light emitting diode, the cathode of the twelfth light emitting diode, the cathode of the thirteenth light emitting diode, the cathode of the fourteenth light emitting diode, the cathode of the fifteenth light emitting diode, the cathode of the sixteenth light emitting diode, the cathode of the seventeenth light emitting diode, the cathode of the eighteenth light emitting diode, the cathode of the nineteenth light emitting diode, the cathode of the twentieth light emitting diode, the cathode of the twenty-first light emitting diode, the cathode of the twenty-second light emitting diode, the cathode of the twenty-third light emitting diode, the cathode of the twenty-fourth light emitting diode, the cathode of the twenty-fifth light emitting diode, the cathode of the twenty-sixth light emitting diode, the cathode of the twenty-seventh light emitting diode, the cathode of the twenty-eighth light emitting diode, the cathode of the twenty-ninth light emitting diode The cathode of the tube, the cathode of the thirtieth light emitting diode, the cathode of the thirty-first light emitting diode, the cathode of the thirty-second light emitting diode, the cathode of the thirty-third light emitting diode, the cathode of the thirty-third light emitting diode, the cathode of the thirty-fourth light emitting diode, the cathode of the thirty-fifth light emitting diode, the cathode of the thirty-sixth light emitting diode, the cathode of the thirty-seventh light emitting diode, the cathode of the thirty-eighth light emitting diode, the cathode of the thirty-ninth light emitting diode, the cathode of the fortieth light emitting diode, the cathode of the forty-first light emitting diode, the cathode of the forty-second light emitting diode, the cathode of the forty-third light emitting diode, the cathode of the forty-fourth light emitting diode, the cathode of the forty-fifth light emitting diode, the cathode of the forty-sixth light emitting diode, the cathode of the forty-seventh light emitting diode, the cathode of the forty-eighth light emitting diode, the cathode of the forty-ninth light emitting diode, the cathode of the fiftieth light emitting diode, the cathode of the fifty-first light emitting diode, the cathode of the fifty-second light emitting diode, the cathode of the fifty-third light emitting diode, and the cathode of the fifty-fourth light emitting diode are all connected.

[0015] Furthermore, the device also includes a main controller, and a display screen is provided on the operation panel, and the display screen is connected to the main controller by signal; The device also includes a plurality of photosensitive elements, and the main controller is connected to the photosensitive element signals. The main controller monitors the closed state of the normally open contacts of the heavy relay ZJ15, the normally open contacts of the heavy relay ZJ25, the normally open contacts of the heavy relay ZJ35, the normally open contacts of the heavy relay ZJ45, the normally open contacts of the heavy relay ZJ55 and the normally open contacts of the heavy relay ZJ65 through the photosensitive elements, and monitors the closing state of the pressure plate switch 1CLP1-1, the pressure plate switch 1CLP1-2, the pressure plate switch 1CLP1-3, and the pressure plate switch 1 CLP1-4, pressure plate switch 1CLP1-5, pressure plate switch 1CLP1-6, pressure plate switch 1CLP2-1, pressure plate switch 1CLP2-2, pressure plate switch 1CLP2-3, pressure plate switch 1CLP2-4, pressure plate switch 1CLP2-5, pressure plate switch 1CLP2-6, pressure plate switch 1CLP3-1, pressure plate switch 1CLP3-2, pressure plate switch 1CLP3-3, pressure plate switch 1CLP3-4, pressure plate switch 1CLP3-5, pressure plate switch 1CLP3-6, pressure plate switch 1 CLP4-1、Plate switch 1CLP4-2、Plate switch 1CLP4-3、Plate switch 1CLP4-4、Plate switch 1CLP4-5、Plate switch 1CLP4-6、Plate switch 1CLP5-1、Plate switch 1CLP5-2、Plate switch 1CLP5-3、Plate switch 1CLP5-4、Plate switch 1CLP5-5、Plate switch 1CLP5-6、Plate switch 1CLP6-1、Plate switch 1CLP6-2、Plate switch 1CLP6-3、Plate switch 1 The engaged status of CLP6-4, pressure plate switch 1CLP6-5, pressure plate switch 1CLP6-6, pressure plate switch 1CLP7-1, pressure plate switch 1CLP7-2, pressure plate switch 1CLP7-3, pressure plate switch 1CLP7-4, pressure plate switch 1CLP7-5, pressure plate switch 1CLP7-6, pressure plate switch 1CLP8-1, pressure plate switch 1CLP8-2, pressure plate switch 1CLP8-3, pressure plate switch 1CLP8-4, pressure plate switch 1CLP8-5, and pressure plate switch 1CLP8-6.

[0016] The beneficial effects of the present invention are as follows: through the coordinated work of the hard contact expansion circuit and the tripping outlet circuit, the limited number of spare outlets of the transformer protection device expands to a larger number of interlocking outlets, meeting the interlocking requirements under different operating modes in the scenario of multiple small power sources being connected to the grid, solving the problem of fewer spare medium and low voltage side protection outlet contacts of the transformer protection device, ensuring that when there are a large number of small power sources connected to the grid on the medium and low voltage side busbars of the substation, the small power sources can be promptly and effectively cut off from the system, thereby ensuring the safe and stable operation of the power system.

[0017] These and other objects, features and advantages of the present invention will be fully reflected in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The panel design diagram of the small power grid-connected line switching device of the present invention is shown.

[0019] Figure 2 The topological schematic diagram of the hard-connection point expansion circuit of the small power grid-connected line switching device of the present invention is shown.

[0020] Figure 3 The topological schematic diagram of the tripping outlet circuit of the small power grid-connected line switching device of the present invention is shown.

[0021] Figure 4 The circuit diagram of the pressure plate state monitoring of the small power grid-connected line switching device of the present invention is shown.

[0022] Figure 5 A schematic diagram of a display screen of a #1 main transformer interlocking device in one embodiment of a small power grid-connected line interlocking device of the present invention is shown.

[0023] Figure 6 A primary wiring diagram of a transformer substation in one embodiment of a small power grid-connected line switching device of the present invention is shown.

[0024] Figure 7 A schematic diagram of a display screen of a #2 main transformer interlocking device in one embodiment of a small power grid-connected line interlocking device of the present invention is shown.

[0025] Figure 8 A schematic diagram of a tripping output circuit of an embodiment of a small power grid-connected line switching device of the present invention is shown.

[0026] Fig. 9 A schematic diagram of primary wiring of a transformer substation in another embodiment of a small power grid-connected line switching device of the present invention is shown.

[0027] Fig.10 A primary wiring schematic diagram displayed on a display screen in another embodiment of a small power grid-connected line switching device of the present invention is shown.

[0028] Fig.11 A schematic diagram of a device tripping output circuit in another embodiment of a small power grid-connected line switching device of the present invention is shown. DETAILED DESCRIPTION

[0029] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0030] It should be understood by those skilled in the art that, in the disclosure of the specification, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device including a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices. Therefore, the above terms should not be understood as limiting the present invention.

[0031] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0032] The invention provides a small power grid-connected line joint cutting device, which comprises a hard contact expansion circuit and a tripping outlet circuit.

[0033] The hard contact extension circuit includes a first hard contact extension branch, a second hard contact extension branch, a third hard contact extension branch, a fourth hard contact extension branch, a fifth hard contact extension branch and a sixth hard contact extension branch which are connected in parallel with each other.

[0034] The first hard-contact extension branch is connected in series with the mid-trip switch outlet of the transformer protection device, the second hard-contact extension branch is connected in series with the mid-trip busbar outlet of the transformer protection device, the third hard-contact extension branch is connected in series with the low-trip switch outlet of the transformer protection device, the fourth hard-contact extension branch is connected in series with the low-trip section outlet of the transformer protection device, the fifth hard-contact extension branch is connected in series with the first spare outlet of the transformer protection device, and the sixth hard-contact extension branch is connected in series with the second spare outlet of the transformer protection device.

[0035] Four heavy-duty relays are connected in series in each hard-contact extension branch of the hard-contact extension circuit. The heavy-duty relays connected in series in each hard-contact extension branch have two normally open contacts. The tripping output circuit includes eight grid-connected lines.

[0036] The four heavy relays connected in series each provide two normally open contacts for line expansion, and the tripping output circuit includes eight grid-connected lines. Figure 1 As shown, this embodiment takes four heavy-duty relays connected in series on each hard-contact extension branch as an example. Each heavy-duty relay provides two normally open contacts, and a total of 48 extension outlets are extended to meet the needs of eight grid-connected lines for main transformer protection outlet contacts.

[0037] Each grid-connected line is connected in series with a basic tripping circuit; the basic tripping circuit includes six basic tripping branches connected in parallel; the six basic tripping branches are respectively connected in series with a pressure plate switch, and the six basic tripping branches are also respectively connected in series with a normally open contact of a heavy-duty relay.

[0038] For each grid-connected line, one end of the grid-connected line is used for access to a small power source, and the other end is used for access to the grid through a circuit breaker.

[0039] The transformer protection device is electrically connected to the mid-trip switch outlet, the mid-trip busbar outlet, the low-trip switch outlet, the low-trip section outlet, the first spare outlet, the second spare outlet and each circuit breaker.

[0040] The hard contact extension circuit is used to access each outlet of the transformer protection device. Each branch of the hard contact extension circuit is extended by connecting a heavy-duty relay in series. The normally open contacts of the heavy-duty relay are connected in series to each branch of the tripping outlet circuit. When the mid-trip switch outlet, mid-trip busbar outlet, low-trip switch outlet, low-trip section outlet, first spare outlet or second spare outlet connected to the hard contact extension circuit are closed, the heavy-duty relay on the corresponding basic tripping branch is energized, and the normally open contacts of the corresponding heavy-duty relay on the tripping outlet circuit are closed. The pressure plate switch on the basic tripping branch is pressed. Because each grid-connected line is connected in series with a circuit breaker, the circuit breaker is connected in series between the grid-connected line and the power grid. When the circuit breaker is energized, the normally closed contacts of the circuit breaker are disconnected, cutting off the corresponding small power supply line, thereby realizing the joint cutting of the small power supply line.

[0041] Using a limited number of transformer protection devices (such as Figure 2 , middle switch outlet, middle bus tie outlet, low switch outlet, low section outlet, first backup outlet, second backup outlet) are used to expand the number of joint cutting outlets. In this embodiment, 48 joint cutting outlets are expanded to meet the joint cutting requirements under different operating modes in the scenario of multiple small power sources being connected to the grid.

[0042] By utilizing the coordinated work of the hard contact expansion circuit and the tripping outlet circuit, the limited number of spare outlets of the transformer protection device can expand to provide more joint-cutting outlets to meet the joint-cutting requirements under different operating modes in the scenario of multiple small power sources being connected to the grid, and solve the problem of having fewer contacts at the spare medium and low voltage side protection outlets of the transformer protection device. This ensures that when there are many small power sources connected to the grid on the medium and low voltage side busbars of the substation, the small power sources can be timely and effectively connected to the main power source to ensure the safe and stable operation of the power system.

[0043] In this embodiment, a heavy-duty relay ZJ11, a heavy-duty relay ZJ12, a heavy-duty relay ZJ13, and a heavy-duty relay ZJ14 are connected in series on the first hard-contact extension branch.

[0044] The second hard contact extension branch is connected in series with a heavy-duty relay ZJ21, a heavy-duty relay ZJ22, a heavy-duty relay ZJ23 and a heavy-duty relay ZJ24.

[0045] The third hard contact extension branch is connected in series with a heavy-duty relay ZJ31, a heavy-duty relay ZJ32, a heavy-duty relay ZJ33 and a heavy-duty relay ZJ34.

[0046] The fourth hard contact extension branch is connected in series with a heavy-duty relay ZJ41, a heavy-duty relay ZJ42, a heavy-duty relay ZJ43, and a heavy-duty relay ZJ44.

[0047] The fifth hard contact extension branch is connected in series with a heavy-duty relay ZJ51, a heavy-duty relay ZJ52, a heavy-duty relay ZJ53, and a heavy-duty relay ZJ54.

[0048] The sixth hard contact extension branch is connected in series with a heavy-duty relay ZJ61, a heavy-duty relay ZJ62, a heavy-duty relay ZJ63, and a heavy-duty relay ZJ64.

[0049] The hard contact expansion circuit includes 6 parallel branches, each of which includes 4 series-connected heavy-duty relays, which are used to expand the output of the transformer protection device.

[0050] Each heavy-duty relay can control 2 contacts, that is, 8 normally open contacts of the heavy-duty relay can be expanded in each branch, supporting the disconnection function of up to 8 small power sources connected to the grid and the need for the output of the transformer protection device.

[0051] Exemplarily, the hard contact expansion circuit is powered by a DC110V power supply, the first end of the heavy relay ZJ11 is connected to 110VDC+, the second end of the heavy relay ZJ11 is connected to the first end of the heavy relay ZJ12, the second end of the heavy relay ZJ12 is connected to the first end of the heavy relay ZJ13, the second end of the heavy relay ZJ13 is connected to the first end of the heavy relay ZJ14, the second end of the heavy relay ZJ14 is connected to the first end of the heavy relay ZJ15, the second end of the heavy relay ZJ15 is connected to the first end of the jump switch outlet, and the second end of the jump switch outlet is connected to 110VDC-.

[0052] The first end of the heavy-duty relay ZJ21 is connected to 110VDC+, the second end of the heavy-duty relay ZJ21 is connected to the first end of the heavy-duty relay ZJ22, the second end of the heavy-duty relay ZJ22 is connected to the first end of the heavy-duty relay ZJ23, the second end of the heavy-duty relay ZJ23 is connected to the first end of the heavy-duty relay ZJ24, the second end of the heavy-duty relay ZJ24 is connected to the first end of the heavy-duty relay ZJ25, the second end of the heavy-duty relay ZJ25 is connected to the first end of the jump-middle main coupling outlet, and the second end of the jump-middle main coupling outlet is connected to 110VDC-.

[0053] The first end of the heavy-duty relay ZJ31 is connected to 110VDC+, the second end of the heavy-duty relay ZJ31 is connected to the first end of the heavy-duty relay ZJ32, the second end of the heavy-duty relay ZJ32 is connected to the first end of the heavy-duty relay ZJ33, the second end of the heavy-duty relay ZJ33 is connected to the first end of the heavy-duty relay ZJ34, the second end of the heavy-duty relay ZJ34 is connected to the first end of the heavy-duty relay ZJ35, the second end of the heavy-duty relay ZJ35 is connected to the first end of the low-trip switch output, and the second end of the low-trip switch output is connected to 110VDC-.

[0054] The first end of the heavy-duty relay ZJ41 is connected to 110VDC+, the second end of the heavy-duty relay ZJ41 is connected to the first end of the heavy-duty relay ZJ42, the second end of the heavy-duty relay ZJ42 is connected to the first end of the heavy-duty relay ZJ43, the second end of the heavy-duty relay ZJ43 is connected to the first end of the heavy-duty relay ZJ44, the second end of the heavy-duty relay ZJ44 is connected to the first end of the heavy-duty relay ZJ45, the second end of the heavy-duty relay ZJ45 is connected to the first end of the low-trip section outlet, and the second end of the low-trip section outlet is connected to 110VDC-.

[0055] The first end of heavy-duty relay ZJ51 is connected to 110VDC+, the second end of heavy-duty relay ZJ51 is connected to the first end of heavy-duty relay ZJ52, the second end of heavy-duty relay ZJ52 is connected to the first end of heavy-duty relay ZJ53, the second end of heavy-duty relay ZJ53 is connected to the first end of heavy-duty relay ZJ54, the second end of heavy-duty relay ZJ54 is connected to the first end of heavy-duty relay ZJ55, the second end of heavy-duty relay ZJ55 is connected to the first end of the first backup outlet, and the second end of the first backup outlet is connected to 110VDC-.

[0056] The first end of heavy-duty relay ZJ61 is connected to 110VDC+, the second end of heavy-duty relay ZJ61 is connected to the first end of heavy-duty relay ZJ62, the second end of heavy-duty relay ZJ62 is connected to the first end of heavy-duty relay ZJ63, the second end of heavy-duty relay ZJ63 is connected to the first end of heavy-duty relay ZJ64, the second end of heavy-duty relay ZJ64 is connected to the first end of heavy-duty relay ZJ65, the second end of heavy-duty relay ZJ65 is connected to the first end of the second backup outlet, and the second end of the second backup outlet is connected to 110VDC-.

[0057] Exemplarily, the first grid-connected line includes: a first basic tripping circuit and a pressure plate switch 1CLP1, the first basic tripping circuit and the pressure plate switch 1CLP1 are connected in series. The first basic tripping circuit includes a first basic tripping branch, a second basic tripping branch, a third basic tripping branch, a fourth basic tripping branch, a fifth basic tripping branch and a sixth basic tripping branch, the first basic tripping branch, the second basic tripping branch, the third basic tripping branch, the fourth basic tripping branch, the fifth basic tripping branch and the sixth basic tripping branch are connected in parallel and then connected in series with the pressure plate switch 1CLP1.

[0058] The second grid-connected line includes: a second basic tripping circuit and a pressure plate switch 1CLP2, and the second basic tripping circuit and the pressure plate switch 1CLP2 are connected in series. The second basic tripping circuit includes a seventh basic tripping branch, an eighth basic tripping branch, a ninth basic tripping branch, a tenth basic tripping branch, an eleventh basic tripping branch, and a twelfth basic tripping branch, and the seventh basic tripping branch, the eighth basic tripping branch, the ninth basic tripping branch, the tenth basic tripping branch, the eleventh basic tripping branch, and the twelfth basic tripping branch are connected in parallel and then connected in series with the pressure plate switch 1CLP2.

[0059] The third grid-connected line includes: a third basic tripping circuit and a pressure plate switch 1CLP3, and the third basic tripping circuit and the pressure plate switch 1CLP3 are connected in series. The third basic tripping circuit includes a thirteenth basic tripping branch, a fourteenth basic tripping branch, a fifteenth basic tripping branch, a sixteenth basic tripping branch, a seventeenth basic tripping branch and an eighteenth basic tripping branch, and the thirteenth basic tripping branch, the fourteenth basic tripping branch, the fifteenth basic tripping branch, the sixteenth basic tripping branch, the seventeenth basic tripping branch and the eighteenth basic tripping branch are connected in parallel and then connected in series with the pressure plate switch 1CLP3.

[0060] The fourth grid-connected line includes: a fourth basic tripping circuit and a pressure plate switch 1CLP4, and the fourth basic tripping circuit and the pressure plate switch 1CLP4 are connected in series. The fourth basic tripping circuit includes a 19th basic tripping branch, a 20th basic tripping branch, a 21st basic tripping branch, a 22nd basic tripping branch, a 23rd basic tripping branch, and a 24th basic tripping branch, and the 19th basic tripping branch, the 20th basic tripping branch, the 21st basic tripping branch, the 22nd basic tripping branch, the 23rd basic tripping branch, and the 24th basic tripping branch are connected in parallel and then connected in series with the pressure plate switch 1CLP4.

[0061] The fifth grid-connected line includes: a fifth basic tripping circuit and a pressure plate switch 1CLP5, and the fifth basic tripping circuit and the pressure plate switch 1CLP5 are connected in series. The fifth basic tripping circuit includes a twenty-fifth basic tripping branch, a twenty-sixth basic tripping branch, a twenty-seventh basic tripping branch, a twenty-eighth basic tripping branch, a twenty-ninth basic tripping branch and a thirtieth basic tripping branch, and the twenty-fifth basic tripping branch, the twenty-sixth basic tripping branch, the twenty-seventh basic tripping branch, the twenty-eighth basic tripping branch, the twenty-ninth basic tripping branch and the thirtieth basic tripping branch are connected in parallel and then connected in series with the pressure plate switch 1CLP5.

[0062] The sixth grid-connected line includes: a sixth basic tripping circuit and a pressure plate switch 1CLP6, and the sixth basic tripping circuit and the pressure plate switch 1CLP6 are connected in series. The sixth basic tripping circuit includes a thirty-first basic tripping branch, a thirty-second basic tripping branch, a thirty-third basic tripping branch, a thirty-fourth basic tripping branch, a thirty-fifth basic tripping branch, and a thirty-sixth basic tripping branch, and the thirty-first basic tripping branch, the thirty-second basic tripping branch, the thirty-third basic tripping branch, the thirty-fourth basic tripping branch, the thirty-fifth basic tripping branch, and the thirty-sixth basic tripping branch are connected in parallel and then connected in series with the pressure plate switch 1CLP6.

[0063] The seventh grid-connected line includes: a seventh basic tripping circuit and a pressure plate switch 1CLP7, and the seventh basic tripping circuit and the pressure plate switch 1CLP7 are connected in series. The seventh basic tripping circuit includes a thirty-seventh basic tripping branch, a thirty-eighth basic tripping branch, a thirty-ninth basic tripping branch, a fortieth basic tripping branch, a forty-first basic tripping branch, and a forty-second basic tripping branch, and the thirty-seventh basic tripping branch, the thirty-eighth basic tripping branch, the thirty-ninth basic tripping branch, the fortieth basic tripping branch, the forty-first basic tripping branch, and the forty-second basic tripping branch are connected in parallel and then connected in series with the pressure plate switch 1CLP7.

[0064] The eighth grid-connected line includes: an eighth basic tripping circuit and a pressure plate switch 1CLP8, and the eighth basic tripping circuit and the pressure plate switch 1CLP8 are connected in series. The eighth basic tripping circuit includes a 43rd basic tripping branch, a 44th basic tripping branch, a 45th basic tripping branch, a 46th basic tripping branch, a 47th basic tripping branch and a 48th basic tripping branch, and the 43rd basic tripping branch, the 44th basic tripping branch, the 45th basic tripping branch, the 46th basic tripping branch, the 47th basic tripping branch and the 48th basic tripping branch are connected in parallel and then connected in series with the pressure plate switch 1CLP8.

[0065] In this embodiment, Figure 3 As shown, in the first grid-connected line: The first basic tripping branch includes the first contact ZJ11-1 of the heavy relay ZJ11 and the pressure plate switch 1CLP1-1. The first end of the first contact ZJ11-1 of the heavy relay ZJ11 is connected to the pressure plate switch 1CLP1, and the second end of the first contact ZJ11-1 of the heavy relay ZJ11 is connected to the first end of the pressure plate switch 1CLP1-1.

[0066] The second basic tripping branch includes the first contact ZJ21-1 of the heavy relay ZJ21 and the pressure plate switch 1CLP1-2. The first end of the first contact ZJ21-1 of the heavy relay ZJ21 is connected to the pressure plate switch 1CLP1, and the second end of the first contact ZJ21-1 of the heavy relay ZJ21 is connected to the first end of the pressure plate switch 1CLP1-2.

[0067] The third basic tripping branch includes the first contact ZJ31-1 of the heavy relay ZJ31 and the pressure plate switch 1CLP1-3. The first end of the first contact ZJ31-1 of the heavy relay ZJ31 is connected to the pressure plate switch 1CLP1, and the second end of the first contact ZJ31-1 of the heavy relay ZJ31 is connected to the first end of the pressure plate switch 1CLP1-3.

[0068] The fourth basic tripping branch includes the first contact ZJ41-1 of the heavy relay ZJ41 and the pressure plate switch 1CLP1-4. The first end of the first contact ZJ41-1 of the heavy relay ZJ41 is connected to the pressure plate switch 1CLP1, and the second end of the first contact ZJ41-1 of the heavy relay ZJ41 is connected to the first end of the pressure plate switch 1CLP1-4.

[0069] The fifth basic tripping branch includes the first contact ZJ51-1 of the heavy relay ZJ51 and the pressure plate switch 1CLP1-5. The first end of the first contact ZJ51-1 of the heavy relay ZJ51 is connected to the pressure plate switch 1CLP1, and the second end of the first contact ZJ51-1 of the heavy relay ZJ51 is connected to the first end of the pressure plate switch 1CLP1-5.

[0070] The sixth basic tripping branch includes the first contact ZJ61-1 of the heavy relay ZJ61 and the pressure plate switch 1CLP1-6. The first end of the first contact ZJ61-1 of the heavy relay ZJ61 is connected to the pressure plate switch 1CLP1, and the second end of the first contact ZJ61-1 of the heavy relay ZJ61 is connected to the first end of the pressure plate switch 1CLP1-6.

[0071] In the second grid-connected line: The seventh basic tripping branch includes the second contact ZJ11-2 of the heavy relay ZJ11 and the pressure plate switch 1CLP2-1. The first end of the second contact ZJ11-2 of the heavy relay ZJ11 is connected to the pressure plate switch 1CLP2, and the second end of the second contact ZJ11-2 of the heavy relay ZJ11 is connected to the first end of the pressure plate switch 1CLP2-1.

[0072] The eighth basic tripping branch includes the second contact ZJ21-2 of the heavy relay ZJ21 and the pressure plate switch 1CLP2-2. The first end of the second contact ZJ21-2 of the heavy relay ZJ21 is connected to the pressure plate switch 1CLP2, and the second end of the second contact ZJ21-2 of the heavy relay ZJ21 is connected to the first end of the pressure plate switch 1CLP2-2.

[0073] The ninth basic tripping branch includes the second contact ZJ31-2 of the heavy relay ZJ31 and the pressure plate switch 1CLP2-3, the first end of the second contact ZJ31-2 of the heavy relay ZJ31 is connected to the pressure plate switch 1CLP2, and the second end of the second contact ZJ31-2 of the heavy relay ZJ31 is connected to the first end of the pressure plate switch 1CLP2-3.

[0074] The tenth basic tripping branch includes the second contact ZJ41-2 of the heavy-duty relay ZJ41 and the pressure plate switch 1CLP2-4, the first end of the second contact ZJ41-2 of the heavy-duty relay ZJ41 is connected to the pressure plate switch 1CLP2, and the second end of the second contact ZJ41-2 of the heavy-duty relay ZJ41 is connected to the first end of the pressure plate switch 1CLP2-4.

[0075] The eleventh basic tripping branch includes the second contact ZJ51-2 of the heavy-duty relay ZJ51 and the pressure plate switch 1CLP2-5, the first end of the second contact ZJ51-2 of the heavy-duty relay ZJ51 is connected to the pressure plate switch 1CLP2, and the second end of the second contact ZJ51-2 of the heavy-duty relay ZJ51 is connected to the first end of the pressure plate switch 1CLP2-5.

[0076] The twelfth basic tripping branch includes the second contact ZJ61-2 of the heavy relay ZJ61 and the pressure plate switch 1CLP2-6. The first end of the second contact ZJ61-2 of the heavy relay ZJ61 is connected to the pressure plate switch 1CLP2, and the second end of the second contact ZJ61-2 of the heavy relay ZJ61 is connected to the first end of the pressure plate switch 1CLP2-6.

[0077] In the third grid-connected line: The thirteenth basic tripping branch includes the first contact ZJ12-1 of the heavy relay ZJ12 and the pressure plate switch 1CLP3-1. The first end of the first contact ZJ12-1 of the heavy relay ZJ12 is connected to the pressure plate switch 1CLP3, and the second end of the first contact ZJ12-1 of the heavy relay ZJ12 is connected to the first end of the pressure plate switch 1CLP3-1.

[0078] The fourteenth basic tripping branch includes the first contact ZJ22-1 of the heavy relay ZJ22 and the pressure plate switch 1CLP3-2. The first end of the first contact ZJ22-1 of the heavy relay ZJ22 is connected to the pressure plate switch 1CLP3, and the second end of the first contact ZJ22-1 of the heavy relay ZJ22 is connected to the first end of the pressure plate switch 1CLP3-2.

[0079] The fifteenth basic tripping branch includes the first contact ZJ32-1 of the heavy-duty relay ZJ32 and the pressure plate switch 1CLP3-3. The first end of the first contact ZJ32-1 of the heavy-duty relay ZJ32 is connected to the pressure plate switch 1CLP3, and the second end of the first contact ZJ32-1 of the heavy-duty relay ZJ32 is connected to the first end of the pressure plate switch 1CLP3-3.

[0080] The sixteenth basic tripping branch includes the first contact ZJ42-1 of the heavy-duty relay ZJ42 and the pressure plate switch 1CLP3-4. The first end of the first contact ZJ42-1 of the heavy-duty relay ZJ42 is connected to the pressure plate switch 1CLP3, and the second end of the first contact ZJ42-1 of the heavy-duty relay ZJ42 is connected to the first end of the pressure plate switch 1CLP3-4.

[0081] The seventeenth basic tripping branch includes the first contact ZJ52-1 of the heavy-duty relay ZJ52 and the pressure plate switch 1CLP3-5. The first end of the first contact ZJ52-1 of the heavy-duty relay ZJ52 is connected to the pressure plate switch 1CLP3, and the second end of the first contact ZJ52-1 of the heavy-duty relay ZJ52 is connected to the first end of the pressure plate switch 1CLP3-5.

[0082] The eighteenth basic tripping branch includes the first contact ZJ62-1 of the heavy-duty relay ZJ62 and the pressure plate switch 1CLP3-6. The first end of the first contact ZJ62-1 of the heavy-duty relay ZJ62 is connected to the pressure plate switch 1CLP3, and the second end of the first contact ZJ62-1 of the heavy-duty relay ZJ62 is connected to the first end of the pressure plate switch 1CLP3-6.

[0083] In the fourth grid-connected line: The nineteenth basic tripping branch includes the second contact ZJ12-2 of the heavy relay ZJ12 and the pressure plate switch 1CLP4-1, the first end of the second contact ZJ12-2 of the heavy relay ZJ12 is connected to the pressure plate switch 1CLP4, and the second end of the second contact ZJ12-2 of the heavy relay ZJ12 is connected to the first end of the pressure plate switch 1CLP4-1.

[0084] The twentieth basic tripping branch includes the second contact ZJ22-2 of the heavy-duty relay ZJ22 and the pressure plate switch 1CLP4-2. The first end of the second contact ZJ22-2 of the heavy-duty relay ZJ22 is connected to the pressure plate switch 1CLP4, and the second end of the second contact ZJ22-2 of the heavy-duty relay ZJ22 is connected to the first end of the pressure plate switch 1CLP4-2.

[0085] The twenty-first basic tripping branch includes the second contact ZJ32-2 of the heavy-duty relay ZJ32 and the pressure plate switch 1CLP4-3. The first end of the second contact ZJ32-2 of the heavy-duty relay ZJ32 is connected to the pressure plate switch 1CLP4, and the second end of the second contact ZJ32-2 of the heavy-duty relay ZJ32 is connected to the first end of the pressure plate switch 1CLP4-3.

[0086] The twenty-second basic tripping branch includes the second contact ZJ42-2 of the heavy relay ZJ42 and the pressure plate switch 1CLP4-4, the first end of the second contact ZJ42-2 of the heavy relay ZJ42 is connected to the pressure plate switch 1CLP4, and the second end of the second contact ZJ42-2 of the heavy relay ZJ42 is connected to the first end of the pressure plate switch 1CLP4-4.

[0087] The twenty-third basic tripping branch includes the second contact ZJ52-2 of the heavy-duty relay ZJ52 and the pressure plate switch 1CLP4-5. The first end of the second contact ZJ52-2 of the heavy-duty relay ZJ52 is connected to the pressure plate switch 1CLP4, and the second end of the second contact ZJ52-2 of the heavy-duty relay ZJ52 is connected to the first end of the pressure plate switch 1CLP4-5.

[0088] The twenty-fourth basic tripping branch includes the second contact ZJ62-2 of the heavy relay ZJ62 and the pressure plate switch 1CLP4-6, the first end of the second contact ZJ62-2 of the heavy relay ZJ62 is connected to the pressure plate switch 1CLP4, and the second end of the second contact ZJ62-2 of the heavy relay ZJ62 is connected to the first end of the pressure plate switch 1CLP4-6.

[0089] In the fifth grid-connected line: The twenty-fifth basic tripping branch includes the first contact ZJ13-1 of the heavy relay ZJ13 and the pressure plate switch 1CLP5-1. The first end of the first contact ZJ13-1 of the heavy relay ZJ13 is connected to the pressure plate switch 1CLP5, and the second end of the first contact ZJ13-1 of the heavy relay ZJ13 is connected to the first end of the pressure plate switch 1CLP5-1.

[0090] The twenty-sixth basic tripping branch includes the first contact ZJ23-1 of the heavy relay ZJ23 and the pressure plate switch 1CLP5-2. The first end of the first contact ZJ23-1 of the heavy relay ZJ23 is connected to the pressure plate switch 1CLP5, and the second end of the first contact ZJ23-1 of the heavy relay ZJ23 is connected to the first end of the pressure plate switch 1CLP5-2.

[0091] The twenty-seventh basic tripping branch includes the first contact ZJ33-1 of the heavy-duty relay ZJ33 and the pressure plate switch 1CLP5-3. The first end of the first contact ZJ33-1 of the heavy-duty relay ZJ33 is connected to the pressure plate switch 1CLP5, and the second end of the first contact ZJ33-1 of the heavy-duty relay ZJ33 is connected to the first end of the pressure plate switch 1CLP5-3.

[0092] The twenty-eighth basic tripping branch includes the first contact ZJ43-1 of the heavy-duty relay ZJ43 and the pressure plate switch 1CLP5-4. The first end of the first contact ZJ43-1 of the heavy-duty relay ZJ43 is connected to the pressure plate switch 1CLP5, and the second end of the first contact ZJ43-1 of the heavy-duty relay ZJ43 is connected to the first end of the pressure plate switch 1CLP5-4.

[0093] The twenty-ninth basic tripping branch includes the first contact ZJ53-1 of the heavy-duty relay ZJ53 and the pressure plate switch 1CLP5-5. The first end of the first contact ZJ53-1 of the heavy-duty relay ZJ53 is connected to the pressure plate switch 1CLP5, and the second end of the first contact ZJ53-1 of the heavy-duty relay ZJ53 is connected to the first end of the pressure plate switch 1CLP5-5.

[0094] The thirtieth basic tripping branch includes the first contact ZJ63-1 of the heavy-duty relay ZJ63 and the pressure plate switch 1CLP5-6. The first end of the first contact ZJ63-1 of the heavy-duty relay ZJ63 is connected to the pressure plate switch 1CLP5, and the second end of the first contact ZJ63-1 of the heavy-duty relay ZJ63 is connected to the first end of the pressure plate switch 1CLP5-6.

[0095] In the sixth grid-connected line: The thirty-first basic tripping branch includes the second contact ZJ13-2 of the heavy relay ZJ13 and the pressure plate switch 1CLP6-1. The first end of the second contact ZJ13-2 of the heavy relay ZJ13 is connected to the pressure plate switch 1CLP6, and the second end of the second contact ZJ13-2 of the heavy relay ZJ13 is connected to the first end of the pressure plate switch 1CLP6-1.

[0096] The thirty-second basic tripping branch includes the second contact ZJ23-2 of the heavy relay ZJ23 and the pressure plate switch 1CLP6-2. The first end of the second contact ZJ23-2 of the heavy relay ZJ23 is connected to the pressure plate switch 1CLP6, and the second end of the second contact ZJ23-2 of the heavy relay ZJ23 is connected to the first end of the pressure plate switch 1CLP6-2.

[0097] The thirty-third basic tripping branch includes the second contact ZJ33-2 of the heavy relay ZJ33 and the pressure plate switch 1CLP6-3. The first end of the second contact ZJ33-2 of the heavy relay ZJ33 is connected to the pressure plate switch 1CLP6, and the second end of the second contact ZJ33-2 of the heavy relay ZJ33 is connected to the first end of the pressure plate switch 1CLP6-3.

[0098] The thirty-fourth basic tripping branch includes the second contact ZJ43-2 of the heavy-duty relay ZJ43 and the pressure plate switch 1CLP6-4. The first end of the second contact ZJ43-2 of the heavy-duty relay ZJ43 is connected to the pressure plate switch 1CLP6, and the second end of the second contact ZJ43-2 of the heavy-duty relay ZJ43 is connected to the first end of the pressure plate switch 1CLP6-4.

[0099] The thirty-fifth basic tripping branch includes the second contact ZJ53-2 of the heavy relay ZJ53 and the pressure plate switch 1CLP6-5. The first end of the second contact ZJ53-2 of the heavy relay ZJ53 is connected to the pressure plate switch 1CLP6, and the second end of the second contact ZJ53-2 of the heavy relay ZJ53 is connected to the first end of the pressure plate switch 1CLP6-5.

[0100] The thirty-sixth basic tripping branch includes the second contact ZJ63-2 of the heavy-duty relay ZJ63 and the pressure plate switch 1CLP6-6. The first end of the second contact ZJ63-2 of the heavy-duty relay ZJ63 is connected to the pressure plate switch 1CLP6, and the second end of the second contact ZJ63-2 of the heavy-duty relay ZJ63 is connected to the first end of the pressure plate switch 1CLP6-6.

[0101] In the seventh grid-connected line: The thirty-seventh basic tripping branch includes the first contact ZJ14-1 of the heavy-duty relay ZJ14 and the pressure plate switch 1CLP7-1. The first end of the first contact ZJ14-1 of the heavy-duty relay ZJ14 is connected to the pressure plate switch 1CLP7, and the second end of the first contact ZJ14-1 of the heavy-duty relay ZJ14 is connected to the first end of the pressure plate switch 1CLP7-1.

[0102] The thirty-eighth basic tripping branch includes the first contact ZJ24-1 of the heavy-duty relay ZJ24 and the pressure plate switch 1CLP7-2. The first end of the first contact ZJ24-1 of the heavy-duty relay ZJ24 is connected to the pressure plate switch 1CLP7, and the second end of the first contact ZJ24-1 of the heavy-duty relay ZJ24 is connected to the first end of the pressure plate switch 1CLP7-2.

[0103] The thirty-ninth basic tripping branch includes the first contact ZJ34-1 of the heavy-duty relay ZJ34 and the pressure plate switch 1CLP7-3. The first end of the first contact ZJ34-1 of the heavy-duty relay ZJ34 is connected to the pressure plate switch 1CLP7, and the second end of the first contact ZJ34-1 of the heavy-duty relay ZJ34 is connected to the first end of the pressure plate switch 1CLP7-3.

[0104] The fortieth basic tripping branch includes the first contact ZJ44-1 of the heavy-duty relay ZJ44 and the pressure plate switch 1CLP7-4. The first end of the first contact ZJ44-1 of the heavy-duty relay ZJ44 is connected to the pressure plate switch 1CLP7, and the second end of the first contact ZJ44-1 of the heavy-duty relay ZJ44 is connected to the first end of the pressure plate switch 1CLP7-4.

[0105] The forty-first basic tripping branch includes the first contact ZJ54-1 of the heavy-duty relay ZJ54 and the pressure plate switch 1CLP7-5. The first end of the first contact ZJ54-1 of the heavy-duty relay ZJ54 is connected to the pressure plate switch 1CLP7, and the second end of the first contact ZJ54-1 of the heavy-duty relay ZJ54 is connected to the first end of the pressure plate switch 1CLP7-5.

[0106] The forty-second basic tripping branch includes the first contact ZJ64-1 of the heavy-duty relay ZJ64 and the pressure plate switch 1CLP7-6. The first end of the first contact ZJ64-1 of the heavy-duty relay ZJ64 is connected to the pressure plate switch 1CLP7, and the second end of the first contact ZJ64-1 of the heavy-duty relay ZJ64 is connected to the first end of the pressure plate switch 1CLP7-6.

[0107] In the eighth grid-connected line: The forty-third basic tripping branch includes the second contact ZJ14-2 of the heavy relay ZJ14 and the pressure plate switch 1CLP8-1. The first end of the second contact ZJ14-2 of the heavy relay ZJ14 is connected to the pressure plate switch 1CLP8, and the second end of the second contact ZJ14-2 of the heavy relay ZJ14 is connected to the first end of the pressure plate switch 1CLP8-1.

[0108] The forty-fourth basic tripping branch includes the second contact ZJ24-2 of the heavy relay ZJ24 and the pressure plate switch 1CLP8-2. The first end of the second contact ZJ24-2 of the heavy relay ZJ24 is connected to the pressure plate switch 1CLP8, and the second end of the second contact ZJ24-2 of the heavy relay ZJ24 is connected to the first end of the pressure plate switch 1CLP8-2.

[0109] The forty-fifth basic tripping branch includes the second contact ZJ34-2 of the heavy-duty relay ZJ34 and the pressure plate switch 1CLP8-3. The first end of the second contact ZJ34-2 of the heavy-duty relay ZJ34 is connected to the pressure plate switch 1CLP8, and the second end of the second contact ZJ34-2 of the heavy-duty relay ZJ34 is connected to the first end of the pressure plate switch 1CLP8-3.

[0110] The forty-sixth basic tripping branch includes the second contact ZJ44-2 of the heavy-duty relay ZJ44 and the pressure plate switch 1CLP8-4. The first end of the second contact ZJ44-2 of the heavy-duty relay ZJ44 is connected to the pressure plate switch 1CLP8, and the second end of the second contact ZJ44-2 of the heavy-duty relay ZJ44 is connected to the first end of the pressure plate switch 1CLP8-4.

[0111] The forty-seventh basic tripping branch includes the second contact ZJ54-2 of the heavy-duty relay ZJ54 and the pressure plate switch 1CLP8-5. The first end of the second contact ZJ54-2 of the heavy-duty relay ZJ54 is connected to the pressure plate switch 1CLP8, and the second end of the second contact ZJ54-2 of the heavy-duty relay ZJ54 is connected to the first end of the pressure plate switch 1CLP8-5.

[0112] The forty-eighth basic tripping branch includes the second contact ZJ64-2 of the heavy-duty relay ZJ64 and the pressure plate switch 1CLP8-6. The first end of the second contact ZJ64-2 of the heavy-duty relay ZJ64 is connected to the pressure plate switch 1CLP8, and the second end of the second contact ZJ64-2 of the heavy-duty relay ZJ64 is connected to the first end of the pressure plate switch 1CLP8-6.

[0113] In this embodiment, the pressure plate switch 1CLP1-1, the pressure plate switch 1CLP1-2, the pressure plate switch 1CLP1-3, the pressure plate switch 1CLP1-4, the pressure plate switch 1CLP1-5, the pressure plate switch 1CLP1-6, the pressure plate switch 1CLP2-1, the pressure plate switch 1CLP2-2, the pressure plate switch 1CLP2-3, the pressure plate switch 1CLP2-4, the pressure plate switch 1CLP2-5, the pressure plate switch 1CLP2-6, the pressure plate switch 1CLP3-1, the pressure plate switch 1CLP3-2, the pressure plate switch 1CLP3-3, the pressure plate switch 1CLP3-4, the pressure plate switch 1CLP3-5, the pressure plate switch 1CLP3-6, the pressure plate switch 1CLP4-1, the pressure plate switch 1CLP4-2, the pressure plate switch 1CLP4-3, the pressure plate switch 1CLP4-4, the pressure plate switch 1CLP4-5, the pressure plate switch 1CLP4-6, Plate switch 1CLP5-1, pressure plate switch 1CLP5-2, pressure plate switch 1CLP5-3, pressure plate switch 1CLP5-4, pressure plate switch 1CLP5-5, pressure plate switch 1CLP5-6, pressure plate switch 1CLP6-1, pressure plate switch 1CLP6-2, pressure plate switch 1CLP6-3, pressure plate switch 1CLP6-4, pressure plate switch 1CLP6-5, pressure plate switch 1CLP6-6, pressure plate switch 1CLP7-1, pressure plate switch 1CLP7-2, pressure plate switch 1CLP7-3, pressure plate switch 1CLP7-4, pressure plate switch 1CLP7-5, pressure plate switch 1CLP7-6, pressure plate switch 1CLP8-1, pressure plate switch 1CLP8-2, pressure plate switch 1CLP8-3, pressure plate switch 1CLP8-4, pressure plate switch 1CLP8-5, and pressure plate switch 1CLP8-6 are all integrated on the device body. The 48 pressure plate switches are integrated on the device body, which is convenient for operators to operate and disconnect the corresponding grid-connected branches.

[0114] The device also includes an operation panel, a platen switch 1CLP1-1, a platen switch 1CLP1-2, a platen switch 1CLP1-3, a platen switch 1CLP1-4, a platen switch 1CLP1-5, a platen switch 1CLP1-6, a platen switch 1CLP2-1, a platen switch 1CLP2-2, a platen switch 1CLP2-3, a platen switch 1CLP2-4, a platen switch 1CLP2-5, a platen switch 1CLP2-6, a platen switch 1CLP3-1, a platen switch 1CLP3-2, a platen switch 1CLP3-3, a platen switch 1CLP3-4, a platen switch 1CLP3-5, a platen switch 1CLP3-6, a platen switch 1CLP4-1, a platen switch 1CLP4-2, a platen switch 1CLP4-3, a platen switch 1CLP4-4, a platen switch 1CLP4-5, a platen switch 1CLP4- 6. Platen switch 1CLP5-1, platen switch 1CLP5-2, platen switch 1CLP5-3, platen switch 1CLP5-4, platen switch 1CLP5-5, platen switch 1CLP5-6, platen switch 1CLP6-1, platen switch 1CLP6-2, platen switch 1CLP6-3, platen switch 1CLP6-4, platen switch 1CLP6-5, platen switch 1CLP6-6, platen switch Switch 1CLP7-1, pressure plate switch 1CLP7-2, pressure plate switch 1CLP7-3, pressure plate switch 1CLP7-4, pressure plate switch 1CLP7-5, pressure plate switch 1CLP7-6, pressure plate switch 1CLP8-1, pressure plate switch 1CLP8-2, pressure plate switch 1CLP8-3, pressure plate switch 1CLP8-4, pressure plate switch 1CLP8-5, and pressure plate switch 1CLP8-6 are all integrated on the operation panel.

[0115] Exemplarily, a monitoring relay ZJ15 is also connected in series on the first hard contact extension branch, a monitoring relay ZJ25 is also connected in series on the second hard contact extension branch, a monitoring relay ZJ35 is also connected in series on the third hard contact extension branch, a monitoring relay ZJ45 is also connected in series on the fourth hard contact extension branch, a monitoring relay ZJ55 is also connected in series on the fifth hard contact extension branch, and a monitoring relay ZJ65 is also connected in series on the sixth hard contact extension branch.

[0116] The device also includes a heavy-duty relay monitoring module and a pressure plate switch monitoring module.

[0117] The heavy-duty relay monitoring module comprises six relay monitoring branches connected in parallel with each other, and each relay monitoring branch comprises a normally open contact and a light-emitting diode of a monitoring relay connected in series with each other.

[0118] The pressure plate switch monitoring module includes 48 pressure plate switch monitoring branches connected in parallel with each other, and each pressure plate switch monitoring branch includes a pressure plate switch and a light emitting diode connected in series with each other.

[0119] The heavy-duty relay monitoring module includes: a normally open contact of a monitoring relay ZJ15, a normally open contact of a monitoring relay ZJ25, a normally open contact of a monitoring relay ZJ35, a normally open contact of a monitoring relay ZJ45, a normally open contact of a monitoring relay ZJ55, a normally open contact of a monitoring relay ZJ65, a first light-emitting diode, a second light-emitting diode, a third light-emitting diode, a fourth light-emitting diode, a fifth light-emitting diode and a sixth light-emitting diode.

[0120] The pressure plate switch monitoring module includes: pressure plate switch 1CLP1-1, pressure plate switch 1CLP1-2, pressure plate switch 1CLP1-3, pressure plate switch 1CLP1-4, pressure plate switch 1CLP1-5, pressure plate switch 1CLP1-6, pressure plate switch 1CLP2-1, pressure plate switch 1CLP2-2, pressure plate switch 1CLP2-3, pressure plate switch 1CLP2-4, pressure plate switch 1CLP2-5, pressure plate switch 1CLP2-6, pressure plate switch 1CLP3-1, pressure plate switch 1CLP3-2, pressure plate switch 1CLP3-3, pressure plate switch 1CLP3-4, pressure plate switch 1CLP3-5, pressure plate switch 1CLP3-6, pressure plate switch 1CLP4-1, pressure plate switch 1CLP4- 2. Press plate switch 1CLP4-3, press plate switch 1CLP4-4, press plate switch 1CLP4-5, press plate switch 1CLP4-6, press plate switch 1CLP5-1, press plate switch 1CLP5-2, press plate switch 1CLP5-3, press plate switch 1CLP5-4, press plate switch 1CLP5-5, press plate switch 1CLP5-6, press plate switch 1CLP6-1, press plate switch 1CLP6-2, press plate switch 1CLP6-3, press plate switch 1CLP6-4, press plate switch 1CLP6-5, press plate switch 1CLP6-6, press plate switch 1CLP7-1, press plate switch 1CLP7-2, press plate switch 1CLP7-3, press plate switch 1CLP7-4, press plate switch 1CLP P7-5, platen switch 1CLP7-6, platen switch 1CLP8-1, platen switch 1CLP8-2, platen switch 1CLP8-3, platen switch 1CLP8-4, platen switch 1CLP8-5, platen switch 1CLP8-6, seventh light emitting diode, eighth light emitting diode, ninth light emitting diode, tenth light emitting diode, eleventh light emitting diode, twelfth light emitting diode, thirteenth light emitting diode, fourteenth light emitting diode, fifteenth light emitting diode, sixteenth light emitting diode, seventeenth light emitting diode, eighteenth light emitting diode, nineteenth light emitting diode, twentieth light emitting diode, twenty-first light emitting diode, twenty-second light emitting diode, twenty-third light emitting diode, twenty-fourth light emitting diode tube, the twenty-fifth light emitting diode, the twenty-sixth light emitting diode, the twenty-seventh light emitting diode, the twenty-eighth light emitting diode, the twenty-ninth light emitting diode, the thirtieth light emitting diode, the thirty-first light emitting diode, the thirty-second light emitting diode, the thirty-third light emitting diode, the thirty-third light emitting diode, the thirty-fourth light emitting diode, the thirty-fifth light emitting diode, the thirty-sixth light emitting diode, the thirty-seventh light emitting diode, the thirty-eighth light emitting diode, the thirty-ninth light emitting diode, the fortyth light emitting diode, the forty-first light emitting diode, the forty-second light emitting diode, the forty-third light emitting diode, the forty-fourth light emitting diode, the forty-fifth light emitting diode, the forty-sixth light emitting diode, the forty-seventh light emitting diode, the forty-eighth light emitting diode,The forty-ninth light emitting diode, the fiftieth light emitting diode, the fifty-first light emitting diode, the fifty-second light emitting diode, the fifty-third light emitting diode, and the fifty-fourth light emitting diode.

[0121] The first end of the normally open contact of the monitoring relay ZJ15, the first end of the normally open contact of the monitoring relay ZJ25, the first end of the normally open contact of the monitoring relay ZJ35, the first end of the normally open contact of the monitoring relay ZJ45, the first end of the normally open contact of the monitoring relay ZJ55, the first end of the normally open contact of the monitoring relay ZJ65, the third end of the pressure plate switch 1CLP1-1, the third end of the pressure plate switch 1CLP1-2, the third end of the pressure plate switch 1CLP1-3, the third end of the pressure plate switch 1CLP1-4, the third end of the pressure plate switch 1CLP1-5, the third end of the pressure plate switch 1CLP1-6, the third end of the pressure plate switch 1CLP2-1 the third end of the platen switch 1CLP2-2, the third end of the platen switch 1CLP2-3, the third end of the platen switch 1CLP2-4, the third end of the platen switch 1CLP2-5, the third end of the platen switch 1CLP2-6, the third end of the platen switch 1CLP3-1, the third end of the platen switch 1CLP3-2, the third end of the platen switch 1CLP3-3, the third end of the platen switch 1CLP3-4, the third end of the platen switch 1CLP3-5, the third end of the platen switch 1CLP3-6, the third end of the platen switch 1CLP4-1, the third end of the platen switch 1CLP4-2, and the third end of the platen switch 1CLP 4-3, the third end of the pressure plate switch 1CLP4-4, the third end of the pressure plate switch 1CLP4-5, the third end of the pressure plate switch 1CLP4-6, the third end of the pressure plate switch 1CLP5-1, the third end of the pressure plate switch 1CLP5-2, the third end of the pressure plate switch 1CLP5-3, the third end of the pressure plate switch 1CLP5-4, the third end of the pressure plate switch 1CLP5-5, the third end of the pressure plate switch 1CLP5-6, the third end of the pressure plate switch 1CLP6-1, the third end of the pressure plate switch 1CLP6-2, the third end of the pressure plate switch 1CLP6-3, the third end of the pressure plate switch 1CLP6-4, and the third end of the pressure plate switch 1 The third end of CLP6-5, the third end of pressure plate switch 1CLP6-6, the third end of pressure plate switch 1CLP7-1, the third end of pressure plate switch 1CLP7-2, the third end of pressure plate switch 1CLP7-3, the third end of pressure plate switch 1CLP7-4, the third end of pressure plate switch 1CLP7-5, the third end of pressure plate switch 1CLP7-6, the third end of pressure plate switch 1CLP8-1, the third end of pressure plate switch 1CLP8-2, the third end of pressure plate switch 1CLP8-3, the third end of pressure plate switch 1CLP8-4, the third end of pressure plate switch 1CLP8-5, and the third end of pressure plate switch 1CLP8-6 are all connected.

[0122] The second end of the normally open contact of the monitoring relay ZJ15 is connected to the anode of the first light-emitting diode, the second end of the normally open contact of the monitoring relay ZJ25 is connected to the anode of the second light-emitting diode, the second end of the normally open contact of the monitoring relay ZJ35 is connected to the anode of the third light-emitting diode, the second end of the normally open contact of the monitoring relay ZJ45 is connected to the anode of the fourth light-emitting diode, the second end of the normally open contact of the monitoring relay ZJ55 is connected to the anode of the fifth light-emitting diode, the second end of the normally open contact of the monitoring relay ZJ65 is connected to the anode of the sixth light-emitting diode, the fourth end of the pressure plate switch 1CLP1-1 is connected to the anode of the seventh light-emitting diode, the fourth end of the pressure plate switch 1CLP1-2 is connected to the anode of the eighth light-emitting diode The fourth end of the pressure plate switch 1CLP1-3 is connected to the anode of the ninth light-emitting diode, the fourth end of the pressure plate switch 1CLP1-4 is connected to the anode of the tenth light-emitting diode, the fourth end of the pressure plate switch 1CLP1-5 is connected to the anode of the eleventh light-emitting diode, the fourth end of the pressure plate switch 1CLP1-6 is connected to the anode of the twelfth light-emitting diode, the fourth end of the pressure plate switch 1CLP2-1 is connected to the anode of the thirteenth light-emitting diode, the fourth end of the pressure plate switch 1CLP2-2 is connected to the anode of the fourteenth light-emitting diode, the fourth end of the pressure plate switch 1CLP2-3 is connected to the anode of the fifteenth light-emitting diode, the fourth end of the pressure plate switch 1CLP2-4 is connected to the anode of the sixteenth light-emitting diode, and ...1-2 is connected to the anode of the 15th light-emitting diode. The fourth end of the plate switch 1CLP2-5 is connected to the anode of the seventeenth light-emitting diode, the fourth end of the plate switch 1CLP2-6 is connected to the anode of the eighteenth light-emitting diode, the fourth end of the plate switch 1CLP3-1 is connected to the anode of the nineteenth light-emitting diode, the fourth end of the plate switch 1CLP3-2 is connected to the anode of the twentieth light-emitting diode, the fourth end of the plate switch 1CLP3-3 is connected to the anode of the twenty-first light-emitting diode, the fourth end of the plate switch 1CLP3-4 is connected to the anode of the twenty-second light-emitting diode, the fourth end of the plate switch 1CLP3-5 is connected to the anode of the twenty-third light-emitting diode, the fourth end of the plate switch 1CLP3-6 is connected to the anode of the twenty-fourth light-emitting diode, and the plate The fourth end of the switch 1CLP4-1 is connected to the anode of the twenty-fifth light-emitting diode, the fourth end of the pressure plate switch 1CLP4-2 is connected to the anode of the twenty-sixth light-emitting diode, the fourth end of the pressure plate switch 1CLP4-3 is connected to the anode of the twenty-seventh light-emitting diode, the fourth end of the pressure plate switch 1CLP4-4 is connected to the anode of the twenty-eighth light-emitting diode, the fourth end of the pressure plate switch 1CLP4-5 is connected to the anode of the twenty-ninth light-emitting diode, the fourth end of the pressure plate switch 1CLP4-6 is connected to the anode of the thirtieth light-emitting diode, the fourth end of the pressure plate switch 1CLP5-1 is connected to the anode of the thirty-first light-emitting diode, and the fourth end of the pressure plate switch 1CLP5-2 is connected to the anode of the thirty-second light-emitting diode.The fourth end of the pressure plate switch 1CLP5-3 is connected to the anode of the thirty-third light-emitting diode, the fourth end of the pressure plate switch 1CLP5-4 is connected to the anode of the thirty-fourth light-emitting diode, the fourth end of the pressure plate switch 1CLP5-5 is connected to the anode of the thirty-fifth light-emitting diode, the fourth end of the pressure plate switch 1CLP5-6 is connected to the anode of the thirty-sixth light-emitting diode, the fourth end of the pressure plate switch 1CLP6-1 is connected to the anode of the thirty-seventh light-emitting diode, the fourth end of the pressure plate switch 1CLP6-2 is connected to the anode of the thirty-eighth light-emitting diode, the fourth end of the pressure plate switch 1CLP6-3 is connected to the anode of the thirty-ninth light-emitting diode, the fourth end of the pressure plate switch 1CLP6-4 is connected to the anode of the fortieth light-emitting diode, the fourth end of the pressure plate switch 1CLP6-5 is connected to the anode of the forty-first light-emitting diode, the fourth end of the pressure plate switch 1CLP6-6 is connected to the anode of the forty-second light-emitting diode, and the fourth end of the pressure plate switch 1CLP7-1 is connected to the anode of the forty-third light-emitting diode. The fourth end of the pressure plate switch 1CLP7-2 is connected to the anode of the forty-fourth light-emitting diode, the fourth end of the pressure plate switch 1CLP7-3 is connected to the anode of the forty-fifth light-emitting diode, the fourth end of the pressure plate switch 1CLP7-4 is connected to the anode of the forty-sixth light-emitting diode, the fourth end of the pressure plate switch 1CLP7-5 is connected to the anode of the forty-seventh light-emitting diode, the fourth end of the pressure plate switch 1CLP7-6 is connected to the anode of the forty-eighth light-emitting diode, the fourth end of the pressure plate switch 1CLP8-1 is connected to the anode of the forty-ninth light-emitting diode, the fourth end of the pressure plate switch 1CLP8-2 is connected to the anode of the fiftieth light-emitting diode, the fourth end of the pressure plate switch 1CLP8-3 is connected to the anode of the fifty-first light-emitting diode, the fourth end of the pressure plate switch 1CLP8-4 is connected to the anode of the fifty-second light-emitting diode, the fourth end of the pressure plate switch 1CLP8-5 is connected to the anode of the fifty-third light-emitting diode, and the fourth end of the pressure plate switch 1CLP8-6 is connected to the anode of the first light-emitting diode. ,

[0123] the cathode of the first light emitting diode, the cathode of the second light emitting diode, the cathode of the third light emitting diode, the cathode of the fourth light emitting diode, the cathode of the fifth light emitting diode, the cathode of the sixth light emitting diode, the cathode of the seventh light emitting diode, the cathode of the eighth light emitting diode, the cathode of the ninth light emitting diode, the cathode of the tenth light emitting diode, the cathode of the eleventh light emitting diode, the cathode of the twelfth light emitting diode, the cathode of the thirteenth light emitting diode, the cathode of the fourteenth light emitting diode, the cathode of the fifteenth light emitting diode, the cathode of the sixteenth light emitting diode, the cathode of the seventeenth light emitting diode, the cathode of the eighteenth light emitting diode, the cathode of the nineteenth light emitting diode, the cathode of the twentieth light emitting diode, the cathode of the twenty-first light emitting diode, the cathode of the twenty-second light emitting diode, the cathode of the twenty-third light emitting diode, the cathode of the twenty-fourth light emitting diode, the cathode of the twenty-fifth light emitting diode, the cathode of the twenty-sixth light emitting diode, the cathode of the twenty-seventh light emitting diode, the cathode of the twenty-eighth light emitting diode, the cathode of the twenty-ninth light emitting diode The cathode of the tube, the cathode of the thirtieth light emitting diode, the cathode of the thirty-first light emitting diode, the cathode of the thirty-second light emitting diode, the cathode of the thirty-third light emitting diode, the cathode of the thirty-third light emitting diode, the cathode of the thirty-fourth light emitting diode, the cathode of the thirty-fifth light emitting diode, the cathode of the thirty-sixth light emitting diode, the cathode of the thirty-seventh light emitting diode, the cathode of the thirty-eighth light emitting diode, the cathode of the thirty-ninth light emitting diode, the cathode of the fortieth light emitting diode, the cathode of the forty-first light emitting diode, the cathode of the forty-second light emitting diode, the cathode of the forty-third light emitting diode, the cathode of the forty-fourth light emitting diode, the cathode of the forty-fifth light emitting diode, the cathode of the forty-sixth light emitting diode, the cathode of the forty-seventh light emitting diode, the cathode of the forty-eighth light emitting diode, the cathode of the forty-ninth light emitting diode, the cathode of the fiftieth light emitting diode, the cathode of the fifty-first light emitting diode, the cathode of the fifty-second light emitting diode, the cathode of the fifty-third light emitting diode, and the cathode of the fifty-fourth light emitting diode are all connected.

[0124] It can be understood that the heavy-duty relay monitoring module includes: a monitoring branch of the heavy-duty relay of the first hard-contact extension branch connected in parallel, a monitoring branch of the heavy-duty relay of the second hard-contact extension branch, a monitoring branch of the heavy-duty relay of the third hard-contact extension branch, a monitoring branch of the heavy-duty relay of the fourth hard-contact extension branch, a monitoring branch of the heavy-duty relay of the fifth hard-contact extension branch, and a monitoring branch of the heavy-duty relay of the sixth hard-contact extension branch.

[0125] The monitoring branch of the heavy-duty relay of the first hard-contact extension branch includes a monitoring relay ZJ15 and a first light-emitting diode.

[0126] The monitoring branch of the heavy-duty relay of the second hard-contact extension branch includes a monitoring relay ZJ25 and a second light-emitting diode.

[0127] The monitoring branch of the heavy-duty relay of the third hard-contact extension branch includes a monitoring relay ZJ35 and a third light-emitting diode.

[0128] The monitoring branch of the heavy-duty relay of the fourth hard-contact extension branch includes a monitoring relay ZJ45 and a fourth light-emitting diode.

[0129] The monitoring branch of the heavy-duty relay of the fifth hard-contact extension branch includes a monitoring relay ZJ55 and a fifth light-emitting diode.

[0130] The monitoring branch of the heavy-duty relay of the sixth hard-contact extension branch includes a monitoring relay ZJ65 and a sixth light-emitting diode.

[0131] In this embodiment, the pressure plate switch monitoring module includes 48 pressure plate switch monitoring branches, and a pressure plate switch and a light emitting diode are connected in series to each pressure plate switch monitoring branch.

[0132] When the jumper switch outlet in the first hard contact extension branch is closed, the monitoring relay ZJ15 is energized, the first end and the second end of the normally open contact of the monitoring relay ZJ15 are closed, and the first light-emitting diode is turned on and emits light. Since the main controller and the photosensitive element are pre-configured and installed in the device, the main controller detects through the photosensitive element that the two ends of the normally open contact of the monitoring relay ZJ15 are normally closed, reflecting that the monitoring relay ZJ15 is normally energized.

[0133] It can be understood that each light emitting diode has a photosensitive element used in conjunction with it, and the light sources between the light emitting diodes are independent of each other and do not interfere with each other.

[0134] At the same time, when the jumper switch outlet in the first hard contact extension branch is closed, the heavy relay ZJ11, heavy relay ZJ12, heavy relay ZJ13, and heavy relay ZJ14 are all energized, and both ends of the normally open contact of heavy relay ZJ11, both ends of the normally open contact of heavy relay ZJ12, both ends of the normally open contact of heavy relay ZJ13, and both ends of the normally open contact of heavy relay ZJ14 are all closed. If the first grid-connected line needs to be connected at this time, the pressure plate switch 1CLP1-1 is put into operation, and the first basic tripping branch on the first basic tripping circuit is turned on, and the current flows through the third and fourth ends of the pressure plate switch 1CLP1-1. At this time, the seventh light-emitting diode is turned on and emits light. The main controller detects that the pressure plate switch 1CLP1-1 is normally put into operation through the photosensitive element.

[0135] The device also includes a power supply module, which provides 110VDC power supply for the device. The power supply module uses 220V DC voltage for power supply. The power supply module converts 220V DC power supply into 110VDC to power the device.

[0136] Exemplarily, the device also includes a CPU board and a panel button, the panel button is connected to the CPU board, the CPU board is connected to the controller of the transformer, and the parameters of the transformer can be adjusted through the panel buttons, and the adjustable parameters include the system wiring control word of the medium and low voltage side of the transformer, and the line grid connection mode control word. For the system wiring control word of the medium and low voltage side of the transformer, 0 represents no medium and low voltage side, 1 represents that the primary system is a single mother segmented wiring, and 2 represents that the primary system is a double mother wiring. For the line grid connection mode control word, 0 represents the line exit, regardless of whether the joint cut-out outlet pressure plate is put into use, the line will not be displayed on the main interface; 1 represents the medium voltage side of the line access system; when the control word is 2, it means that the line is connected to the low voltage side of the system. When the system wiring control word of the medium and low voltage side of the transformer is set to have no medium and low voltage side, there is still a line (assuming it is line X) set to hang on the medium and low voltage side, and the display screen will pop up an error message, prompting "Line X grid connection mode setting error".

[0137] The display screen is connected to the CPU board and can display the transformer primary wiring diagram including the grid-connected small power supply line, and judge the display form of the grid-connected small power supply line according to the following logic. Case 1: The grid-connected mode control word of the small power supply line X is set to 0, and all the outlet pressure plates related to the line in the tripping outlet circuit are not put into operation, then the line will not be displayed on the main wiring diagram of the display screen.

[0138] Case 2: The grid-connected control word of the small power line X is set to 0, and any outlet pressure plate related to the line in the tripped outlet circuit is put into operation. The line X will not be displayed on the main wiring diagram of the display screen, and "Line X inter-cut outlet pressure plate throw-in / out error" will be displayed, and the alarm light will be on.

[0139] Case 3, the grid-connected mode control word of the small power line X is set to 1, and the outlet main pressure plate of the line in the tripping outlet circuit and the outlet pressure plate of the medium voltage side tripping are both put into operation, then the main connection diagram shows that line X is connected to the busbar where the medium voltage side of the transformer is located, and it displays "the function of the main transformer protection action to cut the grid-connected line X is put into operation" and "the grid-connected line X and the main transformer are connected to the same busbar".

[0140] Case 4: The grid-connected mode control word of the small power supply line X is set to 1, and the total output pressure plate of the tripped output circuit that connects the line X, the medium voltage side tripped output pressure plate, and the medium voltage side section (bus coupling) output pressure plate are all put into operation. Then the main connection diagram shows that the line X is connected to another bus section different from the bus where the medium voltage side of the transformer is located, and it displays "the main transformer protection action to cut the grid-connected line X function is put into operation" and "the grid-connected line X and the main transformer are connected to different buses".

[0141] Case 5: The grid-connected mode control word of the small power supply line X is set to 1, and only the outlet main pressure plate of the connected line X or the medium voltage side section (busbar) outlet pressure plate is put into operation in the tripping outlet circuit. The line X will not be displayed on the main wiring diagram of the display screen, and "Main transformer protection action to cut the grid-connected line X function is put into operation" and "Line X connected outlet pressure plate throw-in error" will be displayed, and the alarm light will be lit.

[0142] Case 6: The grid-connected mode control word of the small power supply line X is set to 2, and the total output pressure plate of the line in the tripping output circuit and the output pressure plate of the low-voltage side tripping output are both put into operation, then the main connection diagram shows that line X is connected to the busbar where the low-voltage side of the transformer is located, and it displays "the function of the main transformer protection action to cut the grid-connected line X is put into operation" and "the grid-connected line X and the main transformer are connected to the same busbar".

[0143] Case 7: The grid-connected mode control word of the small power supply line X is set to 2, and the total output pressure plate of the tripping output circuit that connects the line X, the tripping low-voltage side connecting output pressure plate, and the tripping low-voltage side section (bus coupling) output pressure plate are all put into operation. Then the main connection diagram shows that the line X is connected to another bus section different from the bus where the low-voltage side of the transformer is located, and it displays "the main transformer protection action to cut the grid-connected line X function is put into operation" and "the grid-connected line X and the main transformer are connected to different buses".

[0144] Case 8: The grid-connected mode control word of the small power line X is set to 2, and only the outlet main pressure plate of the connected line X or the low-voltage side section outlet pressure plate is put into operation in the tripping outlet circuit. The line X will not be displayed on the main wiring diagram of the display screen, and "Main transformer protection action to cut the grid-connected line X function is put into operation" and "Line X connected outlet pressure plate throw-in error" will be displayed, and the alarm light will be on.

[0145] Because the device needs to be equipped with a large number of outlet pressure plates, in order to avoid the extra wiring work caused by the pressure plate configuration, the present invention integrates the tripping outlet pressure plate with the device board. The pressure plate type is a double pressure plate, and the base with a pressure plate connection hole is directly plugged into the device board, and there is no need to separately wire the tripping outlet pressure plate.

[0146] This device receives the backup node signals of the transformer protection device tripping each switch through the hard contact expansion circuit, expands multiple trip contacts, and then the trip output circuit executes the tripping of these trip contacts on the small power supply line, thereby realizing the interlocking function of the small power supply. It can be understood that hard contact expansion refers to increasing the number of input and output points of the circuit through physical connection. After the expansion, more external devices can be connected, so that the power equipment can be controlled more accurately. The backup node signals of the transformer protection device refer to some contact signals reserved in the transformer protection device. These contact signals are usually not used for normal protection functions, but can be used to expand other protection functions or interlock with other devices.

[0147] It can be understood that the main reason for using the backup node signal of the transformer protection device in the present device is that these existing signals can be used without installing new sensors or signal sources for the small power supply interlocking function. By connecting the backup node signal to the small power supply interlocking output expansion device, the interlocking function of the small power supply grid-connected line can be realized.

[0148] When the transformer protection device detects a fault or abnormal situation, its standby node will generate a standby node signal, which is transmitted to the hard contact expansion circuit, and the heavy relay of the hard contact expansion circuit generates a corresponding trip pulse, which is transmitted to the trip outlet circuit to trip the small power supply line. The small power supply joint cutting function is realized, thereby improving the stability and safety of the power system. In this embodiment, the heavy relay is an electrical relay, and its function is to trigger the action of other protection devices or operating mechanisms through the contacts of the relay when the protection device is actuated, thereby realizing the function of the protection device. In the small power supply joint cutting outlet expansion device, the function of the heavy relay is to convert the standby node signal of the transformer protection device into a trip contact signal, thereby realizing the tripping control of the small power supply line. This device can ensure that the power grid can quickly and accurately realize the joint cutting function of the small power supply grid-connected line when a fault occurs, thereby improving the stability and reliability of the power grid.

[0149] For example, Figure 6 As shown, the substation is a conventional substation with a voltage level of 220kV. The high-voltage side of the transformer is connected in a double busbar connection with a bus voltage of 220kV, the medium-voltage side is connected in a double busbar connection with a bus voltage of 110kV, and the low-voltage side is connected in a single busbar segmented connection with a bus voltage of 35kV.

[0150] The operation mode of the medium and low voltage sides is split operation, small power source 1 is connected to the medium voltage side section I bus, small power source 2 is connected to the medium voltage side section II bus, small power source 3 is connected to the low voltage side section I bus, and small power source 4 is connected to the low voltage side section II bus.

[0151] To ensure the reliable operation of the device, it should be set up according to the following steps.

[0152] S1: Set the joint cut main outlet pressure plate: S1-1: put the small power source 1 joint cutting total outlet pressure plate of the #1 main transformer joint cutting device into operation, S1-2: put the small power source 2 joint cutting total outlet pressure plate of the #2 main transformer joint cutting device into operation, S1-3: put the small power source 3 joint cutting total outlet pressure plate of the #1 main transformer joint cutting device into operation, S1-4: put the small power source 4 joint cutting total outlet pressure plate of the #2 main transformer joint cutting device into operation.

[0153] S2: Set the joint cut outlet pressure plate: S2-1: Put into operation the pressure plate at the outlet of small power source 1 at the medium voltage side outlet of the #1 main transformer interlocking device, S2-2: Put into operation the pressure plate at the outlet of small power source 3 at the low voltage side outlet of the #1 main transformer interlocking device, S2-3: Put into operation the pressure plate at the outlet of small power source 2 at the medium voltage side outlet of the #2 main transformer interlocking device, S2-4: Put into operation the pressure plate at the outlet of small power source 4 at the low voltage side outlet of the #2 main transformer interlocking device.

[0154] S3: Set the device control word (the control words of #1 and #2 main transformer interlocking devices are the same): S3-1: The control word of "transformer medium-voltage side system connection" is set to 2, S3-2: The control word of "transformer low-voltage side system connection" is set to 1, S3-3: The control word of "line 1 grid-connected mode" is set to 1, S3-4: The control word of "line 2 grid-connected mode" is set to 1, S3-5: The control word of "line 3 grid-connected mode" is set to 2, S3-6: The control word of "line 4 grid-connected mode" is set to 2.

[0155] After the setting is completed, the display screen of the #1 main transformer interlocking device is as follows Figure 5 As shown, the display screen of the #2 main transformer interlocking device is as follows Figure 7 shown.

[0156] When an internal fault occurs in the #1 main transformer, the #1 main transformer protection device will be activated. According to the preset logic, the #1 main transformer should be connected to the small power source 1 and the small power source 3, and the small power source 2 and the small power source 4 should not be disconnected. The #1 main transformer connection device will be activated in the following order: S1: Figure 2 The contacts of the middle switch output and the low switch output of the middle #1 main transformer protection device are closed, and the heavy-duty relays ZJ11 to ZJ15 and ZJ31 to ZJ35 are energized. S2: the heavy-duty relay contacts ZJ11-1, ZJ11-2, ZJ12-1, ZJ12-2, ZJ31-1, ZJ31-2, ZJ32-1, and ZJ32-2 are closed. Figure 8 As shown, S3: the outlet on the medium voltage side of the #1 main transformer is connected to the branch where the small power source 1 is located, and the outlet on the low voltage side of the #1 main transformer is connected to the branch where the small power source 3 is located, and the small power sources 1 and 3 are cut off.

[0157] Although contacts ZJ12-1 and ZJ32-1 are closed, small power sources 2 and 4 will not be cut off because the outlet pressure plate of small power source 2 on the medium voltage side outlet of the #1 main transformer interlocking device and the outlet pressure plate of small power source 4 on the low voltage side outlet of the #1 main transformer interlocking device are not put into operation.

[0158] For example, Fig. 9 As shown, the substation voltage level is 220kV and it is a conventional substation. The substation wiring form and small power grid connection method are the same as Figure 6 The operation modes of the medium and low voltage sides are both parallel operation, and the #2 main transformer is out of operation.

[0159] To ensure the reliable operation of the device, it should be set up according to the following steps.

[0160] S1: Set the joint cut main outlet pressure plate: S1-1: Put the small power source 1 joint cutting main outlet pressure plate of the #1 main transformer joint cutting device into operation. S1-2: Put the small power source 3 joint cutting main outlet pressure plate of the #1 main transformer joint cutting device into operation.

[0161] S2: Set the joint cut outlet pressure plate: S2-1: Put into operation the pressure plate for the medium-voltage side outlet of the #1 main transformer interlocking device to cut off the outlet of small power source 1, S2-2: Put into operation the pressure plate for the medium-bus outlet of the #1 main transformer interlocking device to cut off the outlet of small power source 1, S2-3: Put into operation the pressure plate for the medium-voltage side outlet of the #1 main transformer interlocking device to cut off the outlet of small power source 2, S2-4: Put into operation the pressure plate for the medium-bus outlet of the #1 main transformer interlocking device to cut off the outlet of small power source 2, S2-5: Put into operation the pressure plate for the low-voltage side outlet of the #1 main transformer interlocking device to cut off the outlet of small power source 3, S2-6: Put into operation the pressure plate for the low-section outlet of the #1 main transformer interlocking device to cut off the outlet of small power source 3, S2-7: Put into operation the pressure plate for the low-voltage side outlet of the #1 main transformer interlocking device to cut off the outlet of small power source 4, S2-8: Put into operation the pressure plate for the low-section outlet of the #1 main transformer interlocking device to cut off the outlet of small power source 4.

[0162] S3: Set the device control word (the control word of the #1 and #2 main transformer interlocking device is the same): S3-1: The control word of "transformer medium voltage side system connection" is set to 2, S3-2: The control word of "transformer low voltage side system connection" is set to 1, S3-3: The control word of "line 1 grid connection mode" is set to 1, S3-4: The control word of "line 2 grid connection mode" is set to 1, S3-5: The control word of "line 3 grid connection mode" is set to 2, S3-6: The control word of "line 4 grid connection mode" is set to 2.

[0163] After the setting is completed, the display screen of the #1 main transformer interlocking device is as follows Fig.10 shown.

[0164] When an internal fault occurs in the #1 main transformer, the #1 main transformer protection device will be activated. According to the preset logic, the #1 main transformer should be connected to the small power source 1, small power source 2, small power source 3, and small power source 4. The #1 main transformer connection device will be activated in the following order: S1: Figure 2 The middle #1 main transformer protection device trips the middle switch outlet contact, the middle busbar outlet contact, the low switch outlet contact, and the low section outlet contact are closed. Heavy-duty relays ZJ11 to ZJ15, ZJ21 to ZJ25, ZJ31 to ZJ35, and ZJ41 to ZJ45 are energized.

[0165] S2: The heavy-duty relay contacts ZJ11-1, ZJ11-2, ZJ12-1, ZJ12-2, ZJ21-1, ZJ21-2, ZJ22-1, ZJ22-2, ZJ31-1, ZJ31-2, ZJ32-1, ZJ32-2, ZJ41-1, ZJ41-2, ZJ42-1, and ZJ42-2 are closed. Fig.11 shown.

[0166] S3: The outlet of the medium voltage side of #1 main transformer is connected to the branch where the small power source 1 is located, the outlet of the bus tie in #1 main transformer is connected to the branch where the small power source 1 is located, the outlet of the medium voltage side of #1 main transformer is connected to the branch where the small power source 2 is located, the outlet of the bus tie in #1 main transformer is connected to the branch where the small power source 2 is located, the outlet of the low voltage side of #1 main transformer is connected to the branch where the small power source 3 is located, the outlet of the low section of #1 main transformer is connected to the branch where the small power source 3 is located, the outlet of the low voltage side of #1 main transformer is connected to the branch where the small power source 4 is located, and the outlet of the low section of #1 main transformer is connected to the branch where the small power source 4 is located. Small power sources 1, 2, 3, and 4 are all cut off.

[0167] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The advantages of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A small power grid-connected line switching device, characterized in that: The device includes a hard contact expansion circuit and a trip outlet circuit; The hard contact extension circuit includes a first hard contact extension branch, a second hard contact extension branch, a third hard contact extension branch, a fourth hard contact extension branch, a fifth hard contact extension branch and a sixth hard contact extension branch connected in parallel with each other; The first hard-contact extension branch is connected in series with a mid-trip switch outlet of a transformer protection device, the second hard-contact extension branch is connected in series with a mid-trip busbar outlet of a transformer protection device, the third hard-contact extension branch is connected in series with a low-trip switch outlet of a transformer protection device, the fourth hard-contact extension branch is connected in series with a low-trip sectional outlet of a transformer protection device, the fifth hard-contact extension branch is connected in series with a first standby outlet of a transformer protection device, and the sixth hard-contact extension branch is connected in series with a second standby outlet of a transformer protection device; Four heavy-duty relays are connected in series in each hard-contact extension branch of the hard-contact extension circuit; The heavy-duty relays connected in series in each hard-contact extension branch have two normally open contacts; The tripping exit circuit includes eight grid-connected lines; Each grid-connected line is connected in series with a basic tripping circuit; the basic tripping circuit includes six basic tripping branches connected in parallel; each of the six basic tripping branches is connected in series with a pressure plate switch, and each of the six basic tripping branches is also connected in series with a normally open contact of a heavy-duty relay; For each grid-connected line, one end of the grid-connected line is used for the access of small power sources, and the other end is used for access to the grid through a circuit breaker; The transformer protection device is electrically connected to the mid-trip switch outlet, the mid-trip busbar outlet, the low-trip switch outlet, the low-trip section outlet, the first spare outlet, the second spare outlet and each circuit breaker.

2. The device according to claim 1, characterized in that The first hard contact extension branch is connected in series with a heavy-duty relay ZJ11, a heavy-duty relay ZJ12, a heavy-duty relay ZJ13, and a heavy-duty relay ZJ14; The second hard contact extension branch is connected in series with a heavy-duty relay ZJ21, a heavy-duty relay ZJ22, a heavy-duty relay ZJ23, and a heavy-duty relay ZJ24; The third hard contact extension branch is connected in series with a heavy-duty relay ZJ31, a heavy-duty relay ZJ32, a heavy-duty relay ZJ33, and a heavy-duty relay ZJ34; The fourth hard contact extension branch is connected in series with a heavy-duty relay ZJ41, a heavy-duty relay ZJ42, a heavy-duty relay ZJ43, and a heavy-duty relay ZJ44; The fifth hard contact extension branch is connected in series with a heavy-duty relay ZJ51, a heavy-duty relay ZJ52, a heavy-duty relay ZJ53, and a heavy-duty relay ZJ54; The sixth hard contact extension branch is connected in series with a heavy-duty relay ZJ61, a heavy-duty relay ZJ62, a heavy-duty relay ZJ63, and a heavy-duty relay ZJ64.

3. The device according to claim 2, characterized in that The hard contact expansion circuit is powered by a DC110V power supply.

4. The device according to claim 2, characterized in that The first grid-connected line includes: a first basic tripping circuit and a pressure plate switch 1CLP1, the first basic tripping circuit and the pressure plate switch 1CLP1 are connected in series; The second grid-connected line includes: a second basic tripping circuit and a pressure plate switch 1CLP2, the second basic tripping circuit and the pressure plate switch 1CLP2 are connected in series; The third grid-connected line includes: a third basic tripping circuit and a pressure plate switch 1CLP3, the third basic tripping circuit and the pressure plate switch 1CLP3 are connected in series; The fourth grid-connected line includes: a fourth basic tripping circuit and a pressure plate switch 1CLP4, the fourth basic tripping circuit and the pressure plate switch 1CLP4 are connected in series; The fifth grid-connected line includes: a fifth basic tripping circuit and a pressure plate switch 1CLP5, the fifth basic tripping circuit and the pressure plate switch 1CLP5 are connected in series; The sixth grid-connected line includes: a sixth basic tripping circuit and a pressure plate switch 1CLP6, the sixth basic tripping circuit and the pressure plate switch 1CLP6 are connected in series; The seventh grid-connected line includes: a seventh basic tripping circuit and a pressure plate switch 1CLP7, the seventh basic tripping circuit and the pressure plate switch 1CLP7 are connected in series; The eighth grid-connected line includes: an eighth basic tripping circuit and a pressure plate switch 1CLP8, and the eighth basic tripping circuit and the pressure plate switch 1CLP8 are connected in series.

5. The device according to claim 4, characterized in that The first basic tripping circuit includes a first basic tripping branch, a second basic tripping branch, a third basic tripping branch, a fourth basic tripping branch, a fifth basic tripping branch and a sixth basic tripping branch, and the first basic tripping branch, the second basic tripping branch, the third basic tripping branch, the fourth basic tripping branch, the fifth basic tripping branch and the sixth basic tripping branch are connected in parallel and in series with the pressure plate switch 1CLP1; The second basic tripping circuit includes a seventh basic tripping branch, an eighth basic tripping branch, a ninth basic tripping branch, a tenth basic tripping branch, an eleventh basic tripping branch and a twelfth basic tripping branch, and the seventh basic tripping branch, the eighth basic tripping branch, the ninth basic tripping branch, the tenth basic tripping branch, the eleventh basic tripping branch and the twelfth basic tripping branch are connected in parallel and then connected in series with the pressure plate switch 1CLP2; The third basic tripping circuit includes a thirteenth basic tripping branch, a fourteenth basic tripping branch, a fifteenth basic tripping branch, a sixteenth basic tripping branch, a seventeenth basic tripping branch and an eighteenth basic tripping branch, and the thirteenth basic tripping branch, the fourteenth basic tripping branch, the fifteenth basic tripping branch, the sixteenth basic tripping branch, the seventeenth basic tripping branch and the eighteenth basic tripping branch are connected in parallel and in series with the pressure plate switch 1CLP3; The fourth basic tripping circuit includes a nineteenth basic tripping branch, a twentieth basic tripping branch, a twenty-first basic tripping branch, a twenty-second basic tripping branch, a twenty-third basic tripping branch and a twenty-fourth basic tripping branch, and the nineteenth basic tripping branch, the twentieth basic tripping branch, the twenty-first basic tripping branch, the twenty-second basic tripping branch, the twenty-third basic tripping branch and the twenty-fourth basic tripping branch are connected in parallel and in series with the pressure plate switch 1CLP4; The fifth basic tripping circuit includes a twenty-fifth basic tripping branch, a twenty-sixth basic tripping branch, a twenty-seventh basic tripping branch, a twenty-eighth basic tripping branch, a twenty-ninth basic tripping branch and a thirtieth basic tripping branch, and the twenty-fifth basic tripping branch, the twenty-sixth basic tripping branch, the twenty-seventh basic tripping branch, the twenty-eighth basic tripping branch, the twenty-ninth basic tripping branch and the thirtieth basic tripping branch are connected in parallel and then connected in series with the pressure plate switch 1CLP5; The sixth basic tripping circuit includes a thirty-first basic tripping branch, a thirty-second basic tripping branch, a thirty-third basic tripping branch, a thirty-fourth basic tripping branch, a thirty-fifth basic tripping branch and a thirty-sixth basic tripping branch, and the thirty-first basic tripping branch, the thirty-second basic tripping branch, the thirty-third basic tripping branch, the thirty-fourth basic tripping branch, the thirty-fifth basic tripping branch and the thirty-sixth basic tripping branch are connected in parallel and in series with the pressure plate switch 1CLP6; The seventh basic tripping circuit includes a thirty-seventh basic tripping branch, a thirty-eighth basic tripping branch, a thirty-ninth basic tripping branch, a fortieth basic tripping branch, a forty-first basic tripping branch and a forty-second basic tripping branch, and the thirty-seventh basic tripping branch, the thirty-eighth basic tripping branch, the thirty-ninth basic tripping branch, the fortieth basic tripping branch, the forty-first basic tripping branch and the forty-second basic tripping branch are connected in parallel and in series with the pressure plate switch 1CLP7; The eighth basic tripping circuit includes the forty-third basic tripping branch, the forty-fourth basic tripping branch, the forty-fifth basic tripping branch, the forty-sixth basic tripping branch, the forty-seventh basic tripping branch and the forty-eighth basic tripping branch. The forty-third basic tripping branch, the forty-fourth basic tripping branch, the forty-fifth basic tripping branch, the forty-sixth basic tripping branch, the forty-seventh basic tripping branch and the forty-eighth basic tripping branch are connected in parallel and connected in series with the pressure plate switch 1CLP8.

6. The device according to claim 4, characterized in that In the first grid-connected line: The first basic tripping branch includes a first contact ZJ11-1 of a heavy-duty relay ZJ11 and a pressure plate switch 1CLP1-1, a first end of the first contact ZJ11-1 of the heavy-duty relay ZJ11 is connected to the pressure plate switch 1CLP1, and a second end of the first contact ZJ11-1 of the heavy-duty relay ZJ11 is connected to a first end of the pressure plate switch 1CLP1-1; The second basic tripping branch includes a first contact ZJ21-1 of a heavy relay ZJ21 and a pressure plate switch 1CLP1-2, wherein a first end of the first contact ZJ21-1 of the heavy relay ZJ21 is connected to the pressure plate switch 1CLP1, and a second end of the first contact ZJ21-1 of the heavy relay ZJ21 is connected to a first end of the pressure plate switch 1CLP1-2; The third basic tripping branch includes a first contact ZJ31-1 of a heavy relay ZJ31 and a pressure plate switch 1CLP1-3, wherein a first end of the first contact ZJ31-1 of the heavy relay ZJ31 is connected to the pressure plate switch 1CLP1, and a second end of the first contact ZJ31-1 of the heavy relay ZJ31 is connected to a first end of the pressure plate switch 1CLP1-3; The fourth basic tripping branch includes a first contact ZJ41-1 of a heavy relay ZJ41 and a pressure plate switch 1CLP1-4, a first end of the first contact ZJ41-1 of the heavy relay ZJ41 is connected to the pressure plate switch 1CLP1, and a second end of the first contact ZJ41-1 of the heavy relay ZJ41 is connected to a first end of the pressure plate switch 1CLP1-4; The fifth basic tripping branch includes a first contact ZJ51-1 of a heavy relay ZJ51 and a pressure plate switch 1CLP1-5, a first end of the first contact ZJ51-1 of the heavy relay ZJ51 is connected to the pressure plate switch 1CLP1, and a second end of the first contact ZJ51-1 of the heavy relay ZJ51 is connected to a first end of the pressure plate switch 1CLP1-5; The sixth basic tripping branch includes the first contact ZJ61-1 of the heavy relay ZJ61 and the pressure plate switch 1CLP1-6, the first end of the first contact ZJ61-1 of the heavy relay ZJ61 is connected to the pressure plate switch 1CLP1, and the second end of the first contact ZJ61-1 of the heavy relay ZJ61 is connected to the first end of the pressure plate switch 1CLP1-6; In the second grid-connected line: The seventh basic tripping branch includes the second contact ZJ11-2 of the heavy relay ZJ11 and the pressure plate switch 1CLP2-1, the first end of the second contact ZJ11-2 of the heavy relay ZJ11 is connected to the pressure plate switch 1CLP2, and the second end of the second contact ZJ11-2 of the heavy relay ZJ11 is connected to the first end of the pressure plate switch 1CLP2-1; The eighth basic tripping branch includes the second contact ZJ21-2 of the heavy relay ZJ21 and the pressure plate switch 1CLP2-2, the first end of the second contact ZJ21-2 of the heavy relay ZJ21 is connected to the pressure plate switch 1CLP2, and the second end of the second contact ZJ21-2 of the heavy relay ZJ21 is connected to the first end of the pressure plate switch 1CLP2-2; The ninth basic tripping branch includes the second contact ZJ31-2 of the heavy relay ZJ31 and the pressure plate switch 1CLP2-3, the first end of the second contact ZJ31-2 of the heavy relay ZJ31 is connected to the pressure plate switch 1CLP2, and the second end of the second contact ZJ31-2 of the heavy relay ZJ31 is connected to the first end of the pressure plate switch 1CLP2-3; The tenth basic tripping branch includes the second contact ZJ41-2 of the heavy relay ZJ41 and the pressure plate switch 1CLP2-4, the first end of the second contact ZJ41-2 of the heavy relay ZJ41 is connected to the pressure plate switch 1CLP2, and the second end of the second contact ZJ41-2 of the heavy relay ZJ41 is connected to the first end of the pressure plate switch 1CLP2-4; The eleventh basic tripping branch includes the second contact ZJ51-2 of the heavy relay ZJ51 and the pressure plate switch 1CLP2-5, the first end of the second contact ZJ51-2 of the heavy relay ZJ51 is connected to the pressure plate switch 1CLP2, and the second end of the second contact ZJ51-2 of the heavy relay ZJ51 is connected to the first end of the pressure plate switch 1CLP2-5; The twelfth basic tripping branch includes the second contact ZJ61-2 of the heavy relay ZJ61 and the pressure plate switch 1CLP2-6, the first end of the second contact ZJ61-2 of the heavy relay ZJ61 is connected to the pressure plate switch 1CLP2, and the second end of the second contact ZJ61-2 of the heavy relay ZJ61 is connected to the first end of the pressure plate switch 1CLP2-6; In the third grid-connected line: The thirteenth basic tripping branch includes a first contact ZJ12-1 of a heavy-duty relay ZJ12 and a pressure plate switch 1CLP3-1, wherein a first end of the first contact ZJ12-1 of the heavy-duty relay ZJ12 is connected to the pressure plate switch 1CLP3, and a second end of the first contact ZJ12-1 of the heavy-duty relay ZJ12 is connected to a first end of the pressure plate switch 1CLP3-1; The fourteenth basic tripping branch includes a first contact ZJ22-1 of a heavy-duty relay ZJ22 and a pressure plate switch 1CLP3-2, wherein a first end of the first contact ZJ22-1 of the heavy-duty relay ZJ22 is connected to the pressure plate switch 1CLP3, and a second end of the first contact ZJ22-1 of the heavy-duty relay ZJ22 is connected to a first end of the pressure plate switch 1CLP3-2; The fifteenth basic tripping branch includes a first contact ZJ32-1 of a heavy-duty relay ZJ32 and a pressure plate switch 1CLP3-3, wherein a first end of the first contact ZJ32-1 of the heavy-duty relay ZJ32 is connected to the pressure plate switch 1CLP3, and a second end of the first contact ZJ32-1 of the heavy-duty relay ZJ32 is connected to a first end of the pressure plate switch 1CLP3-3; The sixteenth basic tripping branch includes a first contact ZJ42-1 of a heavy-duty relay ZJ42 and a pressure plate switch 1CLP3-4, wherein a first end of the first contact ZJ42-1 of the heavy-duty relay ZJ42 is connected to the pressure plate switch 1CLP3, and a second end of the first contact ZJ42-1 of the heavy-duty relay ZJ42 is connected to a first end of the pressure plate switch 1CLP3-4; The seventeenth basic tripping branch includes a first contact ZJ52-1 of a heavy-duty relay ZJ52 and a pressure plate switch 1CLP3-5, wherein a first end of the first contact ZJ52-1 of the heavy-duty relay ZJ52 is connected to the pressure plate switch 1CLP3, and a second end of the first contact ZJ52-1 of the heavy-duty relay ZJ52 is connected to a first end of the pressure plate switch 1CLP3-5; The eighteenth basic tripping branch includes the first contact ZJ62-1 of the heavy relay ZJ62 and the pressure plate switch 1CLP3-6, the first end of the first contact ZJ62-1 of the heavy relay ZJ62 is connected to the pressure plate switch 1CLP3, and the second end of the first contact ZJ62-1 of the heavy relay ZJ62 is connected to the first end of the pressure plate switch 1CLP3-6; In the fourth grid-connected line: The nineteenth basic tripping branch includes the second contact ZJ12-2 of the heavy relay ZJ12 and the pressure plate switch 1CLP4-1, the first end of the second contact ZJ12-2 of the heavy relay ZJ12 is connected to the pressure plate switch 1CLP4, and the second end of the second contact ZJ12-2 of the heavy relay ZJ12 is connected to the first end of the pressure plate switch 1CLP4-1; The twentieth basic tripping branch includes the second contact ZJ22-2 of the heavy relay ZJ22 and the pressure plate switch 1CLP4-2, the first end of the second contact ZJ22-2 of the heavy relay ZJ22 is connected to the pressure plate switch 1CLP4, and the second end of the second contact ZJ22-2 of the heavy relay ZJ22 is connected to the first end of the pressure plate switch 1CLP4-2; The twenty-first basic tripping branch includes the second contact ZJ32-2 of the heavy relay ZJ32 and the pressure plate switch 1CLP4-3, the first end of the second contact ZJ32-2 of the heavy relay ZJ32 is connected to the pressure plate switch 1CLP4, and the second end of the second contact ZJ32-2 of the heavy relay ZJ32 is connected to the first end of the pressure plate switch 1CLP4-3; The twenty-second basic tripping branch includes the second contact ZJ42-2 of the heavy relay ZJ42 and the pressure plate switch 1CLP4-4, the first end of the second contact ZJ42-2 of the heavy relay ZJ42 is connected to the pressure plate switch 1CLP4, and the second end of the second contact ZJ42-2 of the heavy relay ZJ42 is connected to the first end of the pressure plate switch 1CLP4-4; The twenty-third basic tripping branch includes the second contact ZJ52-2 of the heavy relay ZJ52 and the pressure plate switch 1CLP4-5, the first end of the second contact ZJ52-2 of the heavy relay ZJ52 is connected to the pressure plate switch 1CLP4, and the second end of the second contact ZJ52-2 of the heavy relay ZJ52 is connected to the first end of the pressure plate switch 1CLP4-5; The twenty-fourth basic tripping branch includes the second contact ZJ62-2 of the heavy relay ZJ62 and the pressure plate switch 1CLP4-6, the first end of the second contact ZJ62-2 of the heavy relay ZJ62 is connected to the pressure plate switch 1CLP4, and the second end of the second contact ZJ62-2 of the heavy relay ZJ62 is connected to the first end of the pressure plate switch 1CLP4-6; In the fifth grid-connected line: The twenty-fifth basic tripping branch includes the first contact ZJ13-1 of the heavy relay ZJ13 and the pressure plate switch 1CLP5-1, the first end of the first contact ZJ13-1 of the heavy relay ZJ13 is connected to the pressure plate switch 1CLP5, and the second end of the first contact ZJ13-1 of the heavy relay ZJ13 is connected to the first end of the pressure plate switch 1CLP5-1; The twenty-sixth basic tripping branch includes the first contact ZJ23-1 of the heavy relay ZJ23 and the pressure plate switch 1CLP5-2, the first end of the first contact ZJ23-1 of the heavy relay ZJ23 is connected to the pressure plate switch 1CLP5, and the second end of the first contact ZJ23-1 of the heavy relay ZJ23 is connected to the first end of the pressure plate switch 1CLP5-2; The twenty-seventh basic tripping branch includes the first contact ZJ33-1 of the heavy relay ZJ33 and the pressure plate switch 1CLP5-3, the first end of the first contact ZJ33-1 of the heavy relay ZJ33 is connected to the pressure plate switch 1CLP5, and the second end of the first contact ZJ33-1 of the heavy relay ZJ33 is connected to the first end of the pressure plate switch 1CLP5-3; The twenty-eighth basic tripping branch includes a first contact ZJ43-1 of a heavy-duty relay ZJ43 and a pressure plate switch 1CLP5-4, wherein a first end of the first contact ZJ43-1 of the heavy-duty relay ZJ43 is connected to the pressure plate switch 1CLP5, and a second end of the first contact ZJ43-1 of the heavy-duty relay ZJ43 is connected to a first end of the pressure plate switch 1CLP5-4; The twenty-ninth basic tripping branch includes a first contact ZJ53-1 of a heavy-duty relay ZJ53 and a pressure plate switch 1CLP5-5, wherein a first end of the first contact ZJ53-1 of the heavy-duty relay ZJ53 is connected to the pressure plate switch 1CLP5, and a second end of the first contact ZJ53-1 of the heavy-duty relay ZJ53 is connected to a first end of the pressure plate switch 1CLP5-5; The thirtieth basic tripping branch includes the first contact ZJ63-1 of the heavy relay ZJ63 and the pressure plate switch 1CLP5-6, the first end of the first contact ZJ63-1 of the heavy relay ZJ63 is connected to the pressure plate switch 1CLP5, and the second end of the first contact ZJ63-1 of the heavy relay ZJ63 is connected to the first end of the pressure plate switch 1CLP5-6; In the sixth grid-connected line: The thirty-first basic tripping branch includes the second contact ZJ13-2 of the heavy relay ZJ13 and the pressure plate switch 1CLP6-1, the first end of the second contact ZJ13-2 of the heavy relay ZJ13 is connected to the pressure plate switch 1CLP6, and the second end of the second contact ZJ13-2 of the heavy relay ZJ13 is connected to the first end of the pressure plate switch 1CLP6-1; The thirty-second basic tripping branch includes the second contact ZJ23-2 of the heavy relay ZJ23 and the pressure plate switch 1CLP6-2, the first end of the second contact ZJ23-2 of the heavy relay ZJ23 is connected to the pressure plate switch 1CLP6, and the second end of the second contact ZJ23-2 of the heavy relay ZJ23 is connected to the first end of the pressure plate switch 1CLP6-2; The thirty-third basic tripping branch includes the second contact ZJ33-2 of the heavy relay ZJ33 and the pressure plate switch 1CLP6-3, the first end of the second contact ZJ33-2 of the heavy relay ZJ33 is connected to the pressure plate switch 1CLP6, and the second end of the second contact ZJ33-2 of the heavy relay ZJ33 is connected to the first end of the pressure plate switch 1CLP6-3; The thirty-fourth basic tripping branch includes the second contact ZJ43-2 of the heavy relay ZJ43 and the pressure plate switch 1CLP6-4, the first end of the second contact ZJ43-2 of the heavy relay ZJ43 is connected to the pressure plate switch 1CLP6, and the second end of the second contact ZJ43-2 of the heavy relay ZJ43 is connected to the first end of the pressure plate switch 1CLP6-4; The thirty-fifth basic tripping branch includes the second contact ZJ53-2 of the heavy relay ZJ53 and the pressure plate switch 1CLP6-5, the first end of the second contact ZJ53-2 of the heavy relay ZJ53 is connected to the pressure plate switch 1CLP6, and the second end of the second contact ZJ53-2 of the heavy relay ZJ53 is connected to the first end of the pressure plate switch 1CLP6-5; The thirty-sixth basic tripping branch includes the second contact ZJ63-2 of the heavy relay ZJ63 and the pressure plate switch 1CLP6-6, the first end of the second contact ZJ63-2 of the heavy relay ZJ63 is connected to the pressure plate switch 1CLP6, and the second end of the second contact ZJ63-2 of the heavy relay ZJ63 is connected to the first end of the pressure plate switch 1CLP6-6; In the seventh grid-connected line: The thirty-seventh basic tripping branch includes the first contact ZJ14-1 of the heavy relay ZJ14 and the pressure plate switch 1CLP7-1, the first end of the first contact ZJ14-1 of the heavy relay ZJ14 is connected to the pressure plate switch 1CLP7, and the second end of the first contact ZJ14-1 of the heavy relay ZJ14 is connected to the first end of the pressure plate switch 1CLP7-1; The thirty-eighth basic tripping branch includes the first contact ZJ24-1 of the heavy relay ZJ24 and the pressure plate switch 1CLP7-2, the first end of the first contact ZJ24-1 of the heavy relay ZJ24 is connected to the pressure plate switch 1CLP7, and the second end of the first contact ZJ24-1 of the heavy relay ZJ24 is connected to the first end of the pressure plate switch 1CLP7-2; The thirty-ninth basic tripping branch includes the first contact ZJ34-1 of the heavy relay ZJ34 and the pressure plate switch 1CLP7-3, the first end of the first contact ZJ34-1 of the heavy relay ZJ34 is connected to the pressure plate switch 1CLP7, and the second end of the first contact ZJ34-1 of the heavy relay ZJ34 is connected to the first end of the pressure plate switch 1CLP7-3; The fortieth basic tripping branch includes a first contact ZJ44-1 of a heavy-duty relay ZJ44 and a pressure plate switch 1CLP7-4, wherein a first end of the first contact ZJ44-1 of the heavy-duty relay ZJ44 is connected to the pressure plate switch 1CLP7, and a second end of the first contact ZJ44-1 of the heavy-duty relay ZJ44 is connected to a first end of the pressure plate switch 1CLP7-4; The forty-first basic tripping branch includes the first contact ZJ54-1 of the heavy-duty relay ZJ54 and the pressure plate switch 1CLP7-5, the first end of the first contact ZJ54-1 of the heavy-duty relay ZJ54 is connected to the pressure plate switch 1CLP7, and the second end of the first contact ZJ54-1 of the heavy-duty relay ZJ54 is connected to the first end of the pressure plate switch 1CLP7-5; The forty-second basic tripping branch includes the first contact ZJ64-1 of the heavy relay ZJ64 and the pressure plate switch 1CLP7-6, the first end of the first contact ZJ64-1 of the heavy relay ZJ64 is connected to the pressure plate switch 1CLP7, and the second end of the first contact ZJ64-1 of the heavy relay ZJ64 is connected to the first end of the pressure plate switch 1CLP7-6; In the eighth grid-connected line: The forty-third basic tripping branch includes the second contact ZJ14-2 of the heavy relay ZJ14 and the pressure plate switch 1CLP8-1, the first end of the second contact ZJ14-2 of the heavy relay ZJ14 is connected to the pressure plate switch 1CLP8, and the second end of the second contact ZJ14-2 of the heavy relay ZJ14 is connected to the first end of the pressure plate switch 1CLP8-1; The forty-fourth basic tripping branch includes the second contact ZJ24-2 of the heavy relay ZJ24 and the pressure plate switch 1CLP8-2, the first end of the second contact ZJ24-2 of the heavy relay ZJ24 is connected to the pressure plate switch 1CLP8, and the second end of the second contact ZJ24-2 of the heavy relay ZJ24 is connected to the first end of the pressure plate switch 1CLP8-2; The forty-fifth basic tripping branch includes the second contact ZJ34-2 of the heavy relay ZJ34 and the pressure plate switch 1CLP8-3, the first end of the second contact ZJ34-2 of the heavy relay ZJ34 is connected to the pressure plate switch 1CLP8, and the second end of the second contact ZJ34-2 of the heavy relay ZJ34 is connected to the first end of the pressure plate switch 1CLP8-3; The forty-sixth basic tripping branch includes the second contact ZJ44-2 of the heavy relay ZJ44 and the pressure plate switch 1CLP8-4, the first end of the second contact ZJ44-2 of the heavy relay ZJ44 is connected to the pressure plate switch 1CLP8, and the second end of the second contact ZJ44-2 of the heavy relay ZJ44 is connected to the first end of the pressure plate switch 1CLP8-4; The forty-seventh basic tripping branch includes the second contact ZJ54-2 of the heavy relay ZJ54 and the pressure plate switch 1CLP8-5, the first end of the second contact ZJ54-2 of the heavy relay ZJ54 is connected to the pressure plate switch 1CLP8, and the second end of the second contact ZJ54-2 of the heavy relay ZJ54 is connected to the first end of the pressure plate switch 1CLP8-5; The forty-eighth basic tripping branch includes the second contact ZJ64-2 of the heavy-duty relay ZJ64 and the pressure plate switch 1CLP8-6. The first end of the second contact ZJ64-2 of the heavy-duty relay ZJ64 is connected to the pressure plate switch 1CLP8, and the second end of the second contact ZJ64-2 of the heavy-duty relay ZJ64 is connected to the first end of the pressure plate switch 1CLP8-6.

7. The device according to claim 6, characterized in that The device also includes an operation panel, a platen switch 1CLP1-1, a platen switch 1CLP1-2, a platen switch 1CLP1-3, a platen switch 1CLP1-4, a platen switch 1CLP1-5, a platen switch 1CLP1-6, a platen switch 1CLP2-1, a platen switch 1CLP2-2, a platen switch 1CLP2-3, a platen switch 1CLP2-4, a platen switch 1CLP2-5, a platen switch 1CLP2-6, a platen switch 1CLP3-1, a platen switch 1CLP3-2, a platen switch 1CLP3-3, a platen switch 1CLP3-4, a platen switch 1CLP3-5, a platen switch 1CLP3-6, a platen switch 1CLP4-1, a platen switch 1CLP4-2, a platen switch 1CLP4-3, a platen switch 1CLP4-4, a platen switch 1CLP4-5, a platen switch 1CLP4- 6. Platen switch 1CLP5-1, platen switch 1CLP5-2, platen switch 1CLP5-3, platen switch 1CLP5-4, platen switch 1CLP5-5, platen switch 1CLP5-6, platen switch 1CLP6-1, platen switch 1CLP6-2, platen switch 1CLP6-3, platen switch 1CLP6-4, platen switch 1CLP6-5, platen switch 1CLP6-6, platen switch Switch 1CLP7-1, pressure plate switch 1CLP7-2, pressure plate switch 1CLP7-3, pressure plate switch 1CLP7-4, pressure plate switch 1CLP7-5, pressure plate switch 1CLP7-6, pressure plate switch 1CLP8-1, pressure plate switch 1CLP8-2, pressure plate switch 1CLP8-3, pressure plate switch 1CLP8-4, pressure plate switch 1CLP8-5, and pressure plate switch 1CLP8-6 are all integrated on the operation panel.

8. The device according to claim 7, characterized in that The first hard contact extension branch is also connected in series with a monitoring relay ZJ15, the second hard contact extension branch is also connected in series with a monitoring relay ZJ25, the third hard contact extension branch is also connected in series with a monitoring relay ZJ35, the fourth hard contact extension branch is also connected in series with a monitoring relay ZJ45, the fifth hard contact extension branch is also connected in series with a monitoring relay ZJ55, and the sixth hard contact extension branch is also connected in series with a monitoring relay ZJ65; The device also includes a heavy-duty relay monitoring module and a pressure plate switch monitoring module; The heavy-duty relay monitoring module comprises six relay monitoring branches connected in parallel with each other, and each relay monitoring branch comprises a normally open contact and a light-emitting diode of a monitoring relay connected in series with each other; The pressure plate switch monitoring module includes 48 pressure plate switch monitoring branches connected in parallel with each other, and each pressure plate switch monitoring branch includes a pressure plate switch and a light emitting diode connected in series with each other.

9. The device according to claim 8, characterized in that The heavy-duty relay monitoring module includes: a normally open contact of a monitoring relay ZJ15, a normally open contact of a monitoring relay ZJ25, a normally open contact of a monitoring relay ZJ35, a normally open contact of a monitoring relay ZJ45, a normally open contact of a monitoring relay ZJ55, a normally open contact of a monitoring relay ZJ65, a first light emitting diode, a second light emitting diode, a third light emitting diode, a fourth light emitting diode, a fifth light emitting diode and a sixth light emitting diode; The pressure plate switch monitoring module includes: pressure plate switch 1CLP1-1, pressure plate switch 1CLP1-2, pressure plate switch 1CLP1-3, pressure plate switch 1CLP1-4, pressure plate switch 1CLP1-5, pressure plate switch 1CLP1-6, pressure plate switch 1CLP2-1, pressure plate switch 1CLP2-2, pressure plate switch 1CLP2-3, pressure plate switch 1CLP2-4, pressure plate switch 1CLP2-5, pressure plate switch 1CLP2-6, pressure plate switch 1CLP3-1, pressure plate switch 1CLP3-2, pressure plate switch 1CLP3-3, pressure plate switch 1CLP3-4, pressure plate switch 1CLP3-5, pressure plate switch 1CLP3-6, pressure plate switch 1CLP4-1, pressure plate switch 1CLP4- 2. Press plate switch 1CLP4-3, press plate switch 1CLP4-4, press plate switch 1CLP4-5, press plate switch 1CLP4-6, press plate switch 1CLP5-1, press plate switch 1CLP5-2, press plate switch 1CLP5-3, press plate switch 1CLP5-4, press plate switch 1CLP5-5, press plate switch 1CLP5-6, press plate switch 1CLP6-1, press plate switch 1CLP6-2, press plate switch 1CLP6-3, press plate switch 1CLP6-4, press plate switch 1CLP6-5, press plate switch 1CLP6-6, press plate switch 1CLP7-1, press plate switch 1CLP7-2, press plate switch 1CLP7-3, press plate switch 1CLP7-4, press plate switch 1CLP P7-5, platen switch 1CLP7-6, platen switch 1CLP8-1, platen switch 1CLP8-2, platen switch 1CLP8-3, platen switch 1CLP8-4, platen switch 1CLP8-5, platen switch 1CLP8-6, seventh light emitting diode, eighth light emitting diode, ninth light emitting diode, tenth light emitting diode, eleventh light emitting diode, twelfth light emitting diode, thirteenth light emitting diode, fourteenth light emitting diode, fifteenth light emitting diode, sixteenth light emitting diode, seventeenth light emitting diode, eighteenth light emitting diode, nineteenth light emitting diode, twentieth light emitting diode, twenty-first light emitting diode, twenty-second light emitting diode, twenty-third light emitting diode, twenty-fourth light emitting diode tube, the twenty-fifth light emitting diode, the twenty-sixth light emitting diode, the twenty-seventh light emitting diode, the twenty-eighth light emitting diode, the twenty-ninth light emitting diode, the thirtieth light emitting diode, the thirty-first light emitting diode, the thirty-second light emitting diode, the thirty-third light emitting diode, the thirty-third light emitting diode, the thirty-fourth light emitting diode, the thirty-fifth light emitting diode, the thirty-sixth light emitting diode, the thirty-seventh light emitting diode, the thirty-eighth light emitting diode, the thirty-ninth light emitting diode, the fortyth light emitting diode, the forty-first light emitting diode, the forty-second light emitting diode, the forty-third light emitting diode, the forty-fourth light emitting diode, the forty-fifth light emitting diode, the forty-sixth light emitting diode, the forty-seventh light emitting diode, the forty-eighth light emitting diode,the forty-ninth light emitting diode, the fiftieth light emitting diode, the fifty-first light emitting diode, the fifty-second light emitting diode, the fifty-third light emitting diode, and the fifty-fourth light emitting diode; The first end of the normally open contact of the monitoring relay ZJ15, the first end of the normally open contact of the monitoring relay ZJ25, the first end of the normally open contact of the monitoring relay ZJ35, the first end of the normally open contact of the monitoring relay ZJ45, the first end of the normally open contact of the monitoring relay ZJ55, the first end of the normally open contact of the monitoring relay ZJ65, the third end of the pressure plate switch 1CLP1-1, the third end of the pressure plate switch 1CLP1-2, the third end of the pressure plate switch 1CLP1-3, the third end of the pressure plate switch 1CLP1-4, the third end of the pressure plate switch 1CLP1-5, the third end of the pressure plate switch 1CLP1-6, the third end of the pressure plate switch 1CLP2-1 the third end of the platen switch 1CLP2-2, the third end of the platen switch 1CLP2-3, the third end of the platen switch 1CLP2-4, the third end of the platen switch 1CLP2-5, the third end of the platen switch 1CLP2-6, the third end of the platen switch 1CLP3-1, the third end of the platen switch 1CLP3-2, the third end of the platen switch 1CLP3-3, the third end of the platen switch 1CLP3-4, the third end of the platen switch 1CLP3-5, the third end of the platen switch 1CLP3-6, the third end of the platen switch 1CLP4-1, the third end of the platen switch 1CLP4-2, and the third end of the platen switch 1CLP 4-3, the third end of the pressure plate switch 1CLP4-4, the third end of the pressure plate switch 1CLP4-5, the third end of the pressure plate switch 1CLP4-6, the third end of the pressure plate switch 1CLP5-1, the third end of the pressure plate switch 1CLP5-2, the third end of the pressure plate switch 1CLP5-3, the third end of the pressure plate switch 1CLP5-4, the third end of the pressure plate switch 1CLP5-5, the third end of the pressure plate switch 1CLP5-6, the third end of the pressure plate switch 1CLP6-1, the third end of the pressure plate switch 1CLP6-2, the third end of the pressure plate switch 1CLP6-3, the third end of the pressure plate switch 1CLP6-4, and the third end of the pressure plate switch 1 The third end of CLP6-5, the third end of pressure plate switch 1CLP6-6, the third end of pressure plate switch 1CLP7-1, the third end of pressure plate switch 1CLP7-2, the third end of pressure plate switch 1CLP7-3, the third end of pressure plate switch 1CLP7-4, the third end of pressure plate switch 1CLP7-5, the third end of pressure plate switch 1CLP7-6, the third end of pressure plate switch 1CLP8-1, the third end of pressure plate switch 1CLP8-2, the third end of pressure plate switch 1CLP8-3, the third end of pressure plate switch 1CLP8-4, the third end of pressure plate switch 1CLP8-5, and the third end of pressure plate switch 1CLP8-6 are all connected; The second end of the normally open contact of the monitoring relay ZJ15 is connected to the anode of the first light-emitting diode, the second end of the normally open contact of the monitoring relay ZJ25 is connected to the anode of the second light-emitting diode, the second end of the normally open contact of the monitoring relay ZJ35 is connected to the anode of the third light-emitting diode, the second end of the normally open contact of the monitoring relay ZJ45 is connected to the anode of the fourth light-emitting diode, the second end of the normally open contact of the monitoring relay ZJ55 is connected to the anode of the fifth light-emitting diode, the second end of the normally open contact of the monitoring relay ZJ65 is connected to the anode of the sixth light-emitting diode, the fourth end of the pressure plate switch 1CLP1-1 is connected to the anode of the seventh light-emitting diode, the fourth end of the pressure plate switch 1CLP1-2 is connected to the anode of the eighth light-emitting diode The fourth end of the pressure plate switch 1CLP1-3 is connected to the anode of the ninth light-emitting diode, the fourth end of the pressure plate switch 1CLP1-4 is connected to the anode of the tenth light-emitting diode, the fourth end of the pressure plate switch 1CLP1-5 is connected to the anode of the eleventh light-emitting diode, the fourth end of the pressure plate switch 1CLP1-6 is connected to the anode of the twelfth light-emitting diode, the fourth end of the pressure plate switch 1CLP2-1 is connected to the anode of the thirteenth light-emitting diode, the fourth end of the pressure plate switch 1CLP2-2 is connected to the anode of the fourteenth light-emitting diode, the fourth end of the pressure plate switch 1CLP2-3 is connected to the anode of the fifteenth light-emitting diode, the fourth end of the pressure plate switch 1CLP2-4 is connected to the anode of the sixteenth light-emitting diode, and ...1-2 is connected to the anode of the 15th light-emitting diode. The fourth end of the plate switch 1CLP2-5 is connected to the anode of the seventeenth light-emitting diode, the fourth end of the plate switch 1CLP2-6 is connected to the anode of the eighteenth light-emitting diode, the fourth end of the plate switch 1CLP3-1 is connected to the anode of the nineteenth light-emitting diode, the fourth end of the plate switch 1CLP3-2 is connected to the anode of the twentieth light-emitting diode, the fourth end of the plate switch 1CLP3-3 is connected to the anode of the twenty-first light-emitting diode, the fourth end of the plate switch 1CLP3-4 is connected to the anode of the twenty-second light-emitting diode, the fourth end of the plate switch 1CLP3-5 is connected to the anode of the twenty-third light-emitting diode, the fourth end of the plate switch 1CLP3-6 is connected to the anode of the twenty-fourth light-emitting diode, and the plate The fourth end of the switch 1CLP4-1 is connected to the anode of the twenty-fifth light-emitting diode, the fourth end of the pressure plate switch 1CLP4-2 is connected to the anode of the twenty-sixth light-emitting diode, the fourth end of the pressure plate switch 1CLP4-3 is connected to the anode of the twenty-seventh light-emitting diode, the fourth end of the pressure plate switch 1CLP4-4 is connected to the anode of the twenty-eighth light-emitting diode, the fourth end of the pressure plate switch 1CLP4-5 is connected to the anode of the twenty-ninth light-emitting diode, the fourth end of the pressure plate switch 1CLP4-6 is connected to the anode of the thirtieth light-emitting diode, the fourth end of the pressure plate switch 1CLP5-1 is connected to the anode of the thirty-first light-emitting diode, and the fourth end of the pressure plate switch 1CLP5-2 is connected to the anode of the thirty-second light-emitting diode.The fourth end of the pressure plate switch 1CLP5-3 is connected to the anode of the thirty-third light-emitting diode, the fourth end of the pressure plate switch 1CLP5-4 is connected to the anode of the thirty-fourth light-emitting diode, the fourth end of the pressure plate switch 1CLP5-5 is connected to the anode of the thirty-fifth light-emitting diode, the fourth end of the pressure plate switch 1CLP5-6 is connected to the anode of the thirty-sixth light-emitting diode, the fourth end of the pressure plate switch 1CLP6-1 is connected to the anode of the thirty-seventh light-emitting diode, the fourth end of the pressure plate switch 1CLP6-2 is connected to the anode of the thirty-eighth light-emitting diode, the fourth end of the pressure plate switch 1CLP6-3 is connected to the anode of the thirty-ninth light-emitting diode, the fourth end of the pressure plate switch 1CLP6-4 is connected to the anode of the fortieth light-emitting diode, the fourth end of the pressure plate switch 1CLP6-5 is connected to the anode of the forty-first light-emitting diode, the fourth end of the pressure plate switch 1CLP6-6 is connected to the anode of the forty-second light-emitting diode, and the fourth end of the pressure plate switch 1CLP7-1 is connected to the anode of the forty-third light-emitting diode , the fourth end of the pressure plate switch 1CLP7-2 is connected to the anode of the forty-fourth light-emitting diode, the fourth end of the pressure plate switch 1CLP7-3 is connected to the anode of the forty-fifth light-emitting diode, the fourth end of the pressure plate switch 1CLP7-4 is connected to the anode of the forty-sixth light-emitting diode, the fourth end of the pressure plate switch 1CLP7-5 is connected to the anode of the forty-seventh light-emitting diode, the fourth end of the pressure plate switch 1CLP7-6 is connected to the anode of the forty-eighth light-emitting diode, the fourth end of the pressure plate switch 1CLP8-1 is connected to the anode of the forty-ninth light-emitting diode, the fourth end of the pressure plate switch 1CLP8-2 is connected to the anode of the fiftieth light-emitting diode, the fourth end of the pressure plate switch 1CLP8-3 is connected to the anode of the fifty-first light-emitting diode, the fourth end of the pressure plate switch 1CLP8-4 is connected to the anode of the fifty-second light-emitting diode, the fourth end of the pressure plate switch 1CLP8-5 is connected to the anode of the fifty-third light-emitting diode, and the fourth end of the pressure plate switch 1CLP8-6 is connected to the anode of the first light-emitting diode;, the cathode of the first light emitting diode, the cathode of the second light emitting diode, the cathode of the third light emitting diode, the cathode of the fourth light emitting diode, the cathode of the fifth light emitting diode, the cathode of the sixth light emitting diode, the cathode of the seventh light emitting diode, the cathode of the eighth light emitting diode, the cathode of the ninth light emitting diode, the cathode of the tenth light emitting diode, the cathode of the eleventh light emitting diode, the cathode of the twelfth light emitting diode, the cathode of the thirteenth light emitting diode, the cathode of the fourteenth light emitting diode, the cathode of the fifteenth light emitting diode, the cathode of the sixteenth light emitting diode, the cathode of the seventeenth light emitting diode, the cathode of the eighteenth light emitting diode, the cathode of the nineteenth light emitting diode, the cathode of the twentieth light emitting diode, the cathode of the twenty-first light emitting diode, the cathode of the twenty-second light emitting diode, the cathode of the twenty-third light emitting diode, the cathode of the twenty-fourth light emitting diode, the cathode of the twenty-fifth light emitting diode, the cathode of the twenty-sixth light emitting diode, the cathode of the twenty-seventh light emitting diode, the cathode of the twenty-eighth light emitting diode, the cathode of the twenty-ninth light emitting diode The cathode of the tube, the cathode of the thirtieth light emitting diode, the cathode of the thirty-first light emitting diode, the cathode of the thirty-second light emitting diode, the cathode of the thirty-third light emitting diode, the cathode of the thirty-third light emitting diode, the cathode of the thirty-fourth light emitting diode, the cathode of the thirty-fifth light emitting diode, the cathode of the thirty-sixth light emitting diode, the cathode of the thirty-seventh light emitting diode, the cathode of the thirty-eighth light emitting diode, the cathode of the thirty-ninth light emitting diode, the cathode of the fortieth light emitting diode, the cathode of the forty-first light emitting diode, the cathode of the forty-second light emitting diode, the cathode of the forty-third light emitting diode, the cathode of the forty-fourth light emitting diode, the cathode of the forty-fifth light emitting diode, the cathode of the forty-sixth light emitting diode, the cathode of the forty-seventh light emitting diode, the cathode of the forty-eighth light emitting diode, the cathode of the forty-ninth light emitting diode, the cathode of the fiftieth light emitting diode, the cathode of the fifty-first light emitting diode, the cathode of the fifty-second light emitting diode, the cathode of the fifty-third light emitting diode, and the cathode of the fifty-fourth light emitting diode are all connected.

10. The device according to claim 9, characterized in that The device also includes a main controller, an operation panel is provided with a display screen, and the display screen is connected to the main controller by signal; The device also includes a plurality of photosensitive elements, and the main controller is connected to the photosensitive element signals. The main controller monitors the closed state of the normally open contacts of the heavy relay ZJ15, the normally open contacts of the heavy relay ZJ25, the normally open contacts of the heavy relay ZJ35, the normally open contacts of the heavy relay ZJ45, the normally open contacts of the heavy relay ZJ55 and the normally open contacts of the heavy relay ZJ65 through the photosensitive elements, and monitors the closing state of the pressure plate switch 1CLP1-1, the pressure plate switch 1CLP1-2, the pressure plate switch 1CLP1-3, and the pressure plate switch 1 CLP1-4, pressure plate switch 1CLP1-5, pressure plate switch 1CLP1-6, pressure plate switch 1CLP2-1, pressure plate switch 1CLP2-2, pressure plate switch 1CLP2-3, pressure plate switch 1CLP2-4, pressure plate switch 1CLP2-5, pressure plate switch 1CLP2-6, pressure plate switch 1CLP3-1, pressure plate switch 1CLP3-2, pressure plate switch 1CLP3-3, pressure plate switch 1CLP3-4, pressure plate switch 1CLP3-5, pressure plate switch 1CLP3-6, pressure plate switch 1 CLP4-1、Plate switch 1CLP4-2、Plate switch 1CLP4-3、Plate switch 1CLP4-4、Plate switch 1CLP4-5、Plate switch 1CLP4-6、Plate switch 1CLP5-1、Plate switch 1CLP5-2、Plate switch 1CLP5-3、Plate switch 1CLP5-4、Plate switch 1CLP5-5、Plate switch 1CLP5-6、Plate switch 1CLP6-1、Plate switch 1CLP6-2、Plate switch 1CLP6-3、Plate switch 1 The engaged status of CLP6-4, pressure plate switch 1CLP6-5, pressure plate switch 1CLP6-6, pressure plate switch 1CLP7-1, pressure plate switch 1CLP7-2, pressure plate switch 1CLP7-3, pressure plate switch 1CLP7-4, pressure plate switch 1CLP7-5, pressure plate switch 1CLP7-6, pressure plate switch 1CLP8-1, pressure plate switch 1CLP8-2, pressure plate switch 1CLP8-3, pressure plate switch 1CLP8-4, pressure plate switch 1CLP8-5, and pressure plate switch 1CLP8-6.

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