Wire inlet cabinet control circuit adopting line protection measurement and control device

Abstract

The utility model relates to an incoming line cabinet control circuit adopting a line protection measurement and control device. A plurality of current transformers are arranged on a first power supply incoming line side; connecting the first power supply incoming line side to one side of the air circuit breaker; the other side of the air circuit breaker is connected with a second power supply wire inlet side; a line protection measurement and control device is arranged in the control circuit; under the condition that the line protection measurement and control device performs line protection, the control circuit performs line switching on the first power supply incoming line side and the second power supply incoming line side; the incoming cabinet control circuit is stable in switching and control, and the control circuit is simplified; the technical problems that in an existing incoming cabinet control circuit, a relay circuit is adopted to control power switching of the incoming cabinet control circuit, control of the relay circuit is complex, the number of components is large, and due to the fact that the control circuit is unstable in the switching process, switching fails and even the short circuit phenomenon occurs, and the incoming cabinet circuit is damaged are solved.

Description

Technical Field

[0001] The embodiment of the utility model relates to an incoming line cabinet control circuit, and in particular to an incoming line cabinet control circuit using a line protection measurement and control device. Background Art

[0002] In the existing incoming cabinet control circuit, a relay circuit is used to control the power switching of the incoming cabinet control circuit. The relay circuit control is complex and has many components. The instability of the control circuit during the switching process often leads to switching failure or even short circuit, causing damage to the incoming cabinet circuit. Utility Model Content

[0003] The purpose of the implementation of the present utility model is to provide an incoming cabinet control circuit with stable switching and control, which uses a line protection measurement and control device to replace components and simplifies the control circuit.

[0004] In order to achieve the above objectives, the embodiment of the present invention designs a line cabinet control circuit using a line protection measurement and control device, including:

[0005] First power supply incoming line side;

[0006] Current transformers: a plurality of current transformers are provided on the first power supply incoming line side;

[0007] Air circuit breaker, connecting the first power supply line side to one side of the air circuit breaker;

[0008] A second power supply incoming line side is connected to the second power supply incoming line side on the other side of the air circuit breaker;

[0009] control circuit;

[0010] A line protection and measurement control device is provided in the control circuit; when the line protection and measurement control device performs line protection, the control circuit switches the lines between the first power supply incoming line side and the second power supply incoming line side.

[0011] Furthermore, in the incoming cabinet control circuit of the utility model using the line protection measurement and control device, the first power supply incoming line side is connected to the incoming line side of the knife fuse switch; the outgoing line end of the knife fuse switch is connected to one end of the surge protector; and the other end of the surge protector is grounded.

[0012] Furthermore, in the incoming line cabinet control circuit of the line protection measurement and control device of the present invention, the current transformer further includes:

[0013] The first set of current transformers is connected to the S1 terminal of the first set of current transformers at the 4X13, 4X15, and 4X17 terminals of the line protection and measurement and control device; the S2 terminal of the first set of current transformers is short-circuited and then connected to ground;

[0014] Short-circuit the 4X14, 4X16, and 4X18 terminals of the line protection and control device and connect them to ground.

[0015] The power quality meter is connected to the AL1.I, BL2.I, and CL3.I terminals of the power quality meter at the 4X7, 4X9, and 4X11 terminals of the line protection measurement and control device; the 4X8, 4X10, and 4X12 terminals of the line protection measurement and control device are short-circuited and then grounded.

[0016] An ammeter is connected to the AL1.K, BL2.K, and CL3.K terminals of the power quality meter. The other end of the ammeter is connected to the second set of current transformers. The other end of the second set of current transformers is short-circuited and grounded.

[0017] Furthermore, in the incoming line cabinet control circuit of the utility model using the line protection measurement and control device, the control circuit further includes:

[0018] a first power source;

[0019] A first fuse is connected to a first power source at a first fuse inlet terminal;

[0020] The first normally closed contact of the first intermediate relay is connected to the first normally closed contact input terminal of the first intermediate relay on the first fuse output terminal;

[0021] Second power supply;

[0022] A second fuse is connected to a second power supply at a second fuse inlet terminal;

[0023] The first normally open contact of the first intermediate relay is connected to the first normally open contact input terminal of the first intermediate relay on the second fuse output terminal; the second fuse output terminal is connected to the first intermediate relay coil input terminal; the first intermediate relay coil output terminal is connected to the first neutral line;

[0024] The first normally closed contact output terminal of the first intermediate relay is connected to the first normally open contact output terminal of the first intermediate relay; and then connected to the input terminal of the energy storage circuit of the circuit breaker;

[0025] The outlet terminal of the energy storage circuit of the circuit breaker is connected to the inlet terminal of the second normally open contact of the first intermediate relay and the inlet terminal of the second normally closed contact of the first intermediate relay; the outlet terminal of the second normally open contact of the first intermediate relay is connected to the first neutral line; the outlet terminal of the second normally closed contact of the first intermediate relay is connected to the second neutral line;

[0026] After the first normally closed contact of the first intermediate relay and the first normally open contact of the first intermediate relay are connected, they are connected to the input terminal of the rotary button of the bus coupling cabinet and the first terminal of the transfer switch; the output terminal of the rotary button of the bus coupling cabinet is connected to the third terminal of the transfer switch;

[0027] The fourth terminal of the switch is connected to the input terminal of the start button; the output terminal of the start button is connected to the X6.1 terminal of the circuit breaker and the 1X14 terminal of the line protection measurement and control device respectively;

[0028] The second terminal of the switch is connected to the 1X16 terminal of the line protection measurement and control device;

[0029] Connect the X6.2 terminal of the circuit breaker to the X6.7 terminal of the circuit breaker;

[0030] The X6.8 terminal of the circuit breaker is connected to the incoming terminal of the first normally closed contact of the third intermediate relay;

[0031] The outgoing terminal of the first normally closed contact of the third intermediate relay is connected to the incoming terminal of the second normally closed contact of the first intermediate relay;

[0032] The 1X15 terminal of the line protection and measurement control device is connected to the X6.3 terminal of the circuit breaker and the 1X19 terminal of the line protection and measurement control device; the X6.4 terminal of the circuit breaker is connected to the X6.14 terminal of the circuit breaker; the X6.13 terminal of the circuit breaker is connected to the incoming terminal of the second normally closed contact of the first intermediate relay;

[0033] The outgoing wire terminals of the first normally closed contact of the first intermediate relay are connected to the incoming wire terminals of the trip button; the outgoing wire terminals of the trip button are connected to the X6.3 terminals of the circuit breaker;

[0034] The outgoing wire terminals of the first normally closed contact of the first intermediate relay are respectively connected to the incoming wire terminals of the first contact of the time-delay closing relay; the outgoing wire terminals of the first contact of the time-delay closing relay are connected to the X6.3 terminal of the circuit breaker;

[0035] The first normally closed contact outlet of the first intermediate relay is connected to the 1X18 terminal of the bus coupling cabinet; the 1X19 terminal of the bus coupling cabinet is connected to the X6.3 terminal of the circuit breaker;

[0036] The first normally closed contact output terminal of the first intermediate relay is connected to the X5.5 terminal and the X6.5 terminal of the circuit breaker respectively; the X5.6 terminal and the X6.6 terminal of the circuit breaker are connected to the second intermediate relay coil input terminal and the closing indicator light input terminal; the second intermediate relay coil output terminal and the closing indicator light output terminal are connected to the first normally closed contact input terminal of the first intermediate relay;

[0037] The outgoing line terminal of the first normally closed contact of the first intermediate relay is connected to the incoming line terminal of the first normally open contact of the second intermediate relay and the incoming line terminal of the first normally closed contact of the second intermediate relay respectively; the outgoing line terminal of the first normally open contact of the second intermediate relay and the outgoing line terminal of the first normally closed contact of the second intermediate relay are connected to the closing indicator light and the opening indicator light respectively;

[0038] The first normally closed contact outlets of the first intermediate relay are respectively connected to the reset button inlet; the reset button outlet is connected to the first contact inlet of the time-delay disconnection time relay; the first contact outlet of the time-delay disconnection time relay is connected to the inlet of the yellow light indicator, the inlet of the third intermediate relay coil, and the inlet of the time-delay disconnection time relay coil; the outlets of the yellow light indicator, the outlet of the third intermediate relay coil, and the outlet of the time-delay disconnection time relay coil are all connected to the inlet of the second normally closed contact of the first intermediate relay;

[0039] The outgoing line terminals of the first normally closed contact of the first intermediate relay are respectively connected to the fifth terminal of the bus coupler switch, and the sixth terminal of the bus coupler switch is connected to the X5.9 terminal of the bus coupler circuit breaker; the X5.10 terminal of the bus coupler circuit breaker is connected to the X5.3 terminal of the circuit breaker of the 1# incoming line cabinet; the X5.4 terminal of the circuit breaker of the 1# incoming line cabinet is connected to the incoming line terminal of the delayed closing relay coil; the incoming and outgoing line terminals of the delayed closing relay coil are connected to the incoming line terminal of the second normally closed contact of the first intermediate relay;

[0040] The output terminal of the first normally closed contact of the first intermediate relay is respectively connected to the input terminal of the power quality meter and the 24V power conversion module; the output terminals of the power quality meter and the 24V power conversion module are both connected to the input terminal of the second normally closed contact of the first intermediate relay; the positive and negative poles of the 24V power conversion module are both connected to the X8.3 and X8.4 terminals of the circuit breaker to provide power for the circuit breaker.

[0041] Furthermore, in the incoming line cabinet control circuit using the line protection and measurement and control device of the present invention, the first power supply passing through the third fuse is connected between the 3X15 terminal of the line protection and measurement and control device and the S33.1 terminal, S31.1 terminal, S6.11 terminal, S6.9 terminal and the incoming line terminal of the first contact of the trip button and the fifth terminal of the transfer switch;

[0042] The S33.4 terminal, S31.4 terminal, S6.12 terminal, and S6.10 terminal of the circuit breaker are respectively connected to the 1X04 terminal, 1X05 terminal, 1X07 terminal, and 1X08 terminal of the line protection measurement and control device;

[0043] The first contact outlet of the trip button is connected to the 1X10 terminal of the line protection measurement and control device;

[0044] The sixth terminal of the switch is connected to the 1X12 terminal of the line protection measurement and control device;

[0045] The 3X16 terminal of the line protection and control device is short-circuited with the 1X04-1 terminal, 1X05-1 terminal, 1X07-1 terminal, 1X08-1 terminal, and 1X13 terminal of the line protection and control device and then connected to the neutral line.

[0046] Compared with the prior art, the implementation method of the present invention is as follows: a plurality of current transformers are arranged on the first power incoming line side; the first power incoming line side is connected to one side of the air circuit breaker; the second power incoming line side is connected to the other side of the air circuit breaker; a line protection and measurement and control device is arranged in the control circuit; under the line protection and measurement and control device, the control circuit switches the lines between the first power incoming line side and the second power incoming line side; stable switching and control are achieved, and the line protection and measurement and control device is used to replace components and simplify the incoming cabinet control circuit of the control circuit; the problem that in the existing incoming cabinet control circuit, a relay circuit is used to control the power switching of the incoming cabinet control circuit, the relay circuit control is complex, and there are many components, and there is often a switching failure or even a short circuit due to the instability of the control circuit during the switching process, causing damage to the incoming cabinet circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 This is a schematic diagram of the main circuit structure of the utility model;

[0048] Figure 2 This is a schematic diagram of the connection circuit of the first current transformer structure of the present utility model;

[0049] Figure 3 This is a schematic diagram of the connection circuit of the first current transformer structure of the present utility model;

[0050] Figure 4 is a schematic diagram of the control circuit of the present utility model;

[0051] Figure 5 This is a schematic diagram of the control circuit between the air circuit breaker and the line protection measurement and control device of the present invention. DETAILED DESCRIPTION

[0052] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will appreciate that many technical details are provided in various embodiments of the present invention to facilitate a better understanding of the present application. However, even without these technical details and the various variations and modifications based on the following embodiments, the technical solutions claimed in the claims of this application can be achieved.

[0053] The embodiment of the present utility model relates to a line cabinet control circuit using a line protection measurement and control device, such as Figure 1-Figure 5 Shown, including:

[0054] The first power supply line side 2L1 to 2L3 and 2N serve as the first power supply in this embodiment;

[0055] Several current transformers 2TA1-2TA6 are provided on the first power supply incoming line side 2L1-2L3, 2N; the current transformers 2TA1-2TA6 are used to measure the current of the incoming line cabinet control circuit using the line protection measurement and control device in this embodiment.

[0056] Connect the first power supply incoming line side 2L1~2L3, 2N to one side of the air circuit breaker 2QF; the air circuit breaker 2QF is used to control the connection and disconnection of the incoming line cabinet control circuit using the line protection measurement and control device in this example;

[0057] The other side of the air circuit breaker 2QF is connected to the second power supply line side 2L21-2L3, 2N, which serves as the second power supply in this embodiment and switches with the first power supply line side 2L1-2L3, 2N.

[0058] The control circuit of the incoming line cabinet control circuit of the line protection and measurement control device in this embodiment is used to switch the lines of the first power incoming line side 2L1~2L3, 2N and the second power incoming line side 2L21~2L3, 2N after connecting the line protection and measurement control device 2n.

[0059] A line protection, measurement, and control device 2n is provided in the control circuit. Under line protection provided by the line protection, measurement, and control device 2n switches the lines between the first power supply incoming line side 2L1-2L3, 2N and the second power supply incoming line side 2L21-2L3, 2N. The line protection, measurement, and control device 2n primarily stabilizes the control circuit and simplifies its functionality. In this embodiment, the incoming cabinet control circuit employing the line protection, measurement, and control device replaces components in the relay circuit, achieving stable switching and control. This simplifies the incoming cabinet control circuit by replacing components with the line protection, measurement, and control device. This solves the technical problem that existing incoming cabinet control circuits, which all use relay circuits to control power switching in the incoming cabinet control circuit, suffer from complex relay circuit control and numerous components, and often suffer from switching failures or even short circuits due to instability in the control circuit during switching, resulting in damage to the incoming cabinet circuit.

[0060] In order to achieve the above technical effects, in the incoming line cabinet control circuit of the line protection measurement and control device in this embodiment, as shown in FIG. Figure 1-Figure 5As shown, the first power supply incoming line side 2L1-2L3, 2N is connected to the incoming line side of the knife-fuse switch QS; the outgoing line end of the knife-fuse switch QS is connected to one end of the surge protector SPD; the other end of the surge protector SPD is grounded. The knife-fuse switch QS functions as a manual closing and opening switch. The surge protector SPD is used to protect the incoming line cabinet control circuit of the line protection measurement and control device in this embodiment.

[0061] In order to achieve the above technical effects, in the incoming line cabinet control circuit of the line protection measurement and control device in this embodiment, as shown in FIG. Figure 1-Figure 5 As shown, the current transformers 2TA1-2TA6 also include:

[0062] The S1 end of the first group of current transformers 2TA1-2TA3 is connected to the 4X13, 4X15 and 4X17 terminals of the line protection and measurement and control device 2n; the S2 end of the first group of current transformers 2TA1-2TA3 is short-circuited and grounded; the first group of current transformers 2TA1-2TA3 is used to measure the current of the incoming cabinet control circuit of the line protection and measurement and control device in this embodiment when using the first power incoming line side 2L1~2L3, 2N.

[0063] Short-circuit the 4X14, 4X16, and 4X18 terminals of the line protection and control device 2n and connect them to ground.

[0064] The 4X7, 4X9, and 4X11 terminals of the line protection and measurement and control device 2n are connected to the AL1.I, BL2.I, and CL3.I terminals of the power quality meter 2PM; the 4X8, 4X10, and 4X12 terminals of the line protection and measurement and control device 2n are short-circuited and grounded; the power quality meter 2PM is used to measure and display information such as power and power factor.

[0065] Connect one end of ammeters 2PA1-2PA3 to terminals AL1.K, BL2.K, and CL3.K of power quality meter 2PM. Connect the other ends of ammeters 2PA1-2PA3 to the second set of current transformers 2TA4-2TA6. Short-circuit the other ends of the second set of current transformers 2TA4-2TA6 and ground them. Ammeters 2PA1-2PA are used to measure the current in the incoming cabinet control circuit of the line protection and measurement and control device in this embodiment when using the second power incoming line side 2L21-2L3, 2N.

[0066] In order to achieve the above technical effects, in the incoming line cabinet control circuit of the line protection measurement and control device in this embodiment, as shown in FIG. Figure 1-Figure 5 As shown, the control circuit further includes:

[0067] The first power supply 2L1 is used as the first control power supply in the incoming cabinet control circuit of the line protection measurement and control device in this embodiment;

[0068] The first power supply 2L1 is connected to the line inlet of the first fuse 2FU1; the first fuse 2FU1 is used to protect the control circuit from short circuit;

[0069] Connect the first normally closed contact 2KA1-1 input terminal of the first intermediate relay to the output terminal of the first fuse 2FU1;

[0070] Second power supply 1L;

[0071] The second fuse 2FU2 is connected to the second power supply 2L2 at the line inlet terminal of the second fuse 2FU2;

[0072] The outgoing terminal of the second fuse 2FU2 is connected to the incoming terminal of the first normally open contact 2KA1-2 of the first intermediate relay; the outgoing terminal of the second fuse 2FU2 is connected to the incoming terminal of the first intermediate relay coil 2KA1; the outgoing terminal of the first intermediate relay coil 2KA1 is connected to the first neutral line 1N;

[0073] The output terminal of the first normally closed contact 2KA1-1 of the first intermediate relay is connected to the output terminal of the first normally open contact 2KA1-2 of the first intermediate relay; then the input terminal of the energy storage circuit of the circuit breaker 2QF is connected; through the protection of the first normally closed contact 2KA1-1 of the first intermediate relay and the first normally open contact 2KA1-2 of the first intermediate relay, the control power switching between the first power supply 2L1 and the second power supply 1L is realized during the power switching process.

[0074] The outgoing line end of the energy storage circuit of the circuit breaker 2QF is connected to the incoming line end of the second normally open contact 2KA1-3 of the first intermediate relay and the incoming line end of the second normally closed contact 2KA1-4 of the first intermediate relay; the outgoing line end of the second normally open contact 2KA1-3 of the first intermediate relay is connected to the first neutral line 1N; the outgoing line end of the second normally closed contact 2KA1-4 of the first intermediate relay is connected to the second neutral line 2N; the energy storage circuit of the circuit breaker 2QF is mainly used to store energy in the motor compression spring, and when the circuit breaker 2QF is separated, the circuit breaker 2QF can be separated better and faster.

[0075] After the outgoing terminals of the first normally closed contact 2KA1-1 of the first intermediate relay and the first normally open contact 2KA1-2 of the first intermediate relay are connected, they are connected to the incoming terminal of the main coupling cabinet rotary button 3SA1 and the first terminal of the switching switch 2SA; the outgoing terminal of the main coupling cabinet rotary button 3SA1 is connected to the third terminal of the switching switch 2SA; the switching switch 2SA realizes switching between local and remote operation.

[0076] The fourth terminal of switch 2SA is connected to the incoming line terminal of start button 2SF. The outgoing line terminal of start button 2SF is connected to terminal X6.1 of circuit breaker 2QF and terminal 1X14 of line protection and control device 2n, respectively. Closing start button 2SF manually closes circuit breaker 2QF. Closing terminals 1X14 and 1X16 of line protection and control device 2n remotely closes circuit breaker 2QF.

[0077] The second terminal of the switch 2SA is connected to the 1X16 terminal of the line protection measurement and control device 2n;

[0078] Connect the X6.2 terminal of circuit breaker 2QF to the X6.7 terminal of circuit breaker 2QF;

[0079] The X6.8 terminal of the circuit breaker 2QF is connected to the incoming terminal of the first normally closed contact 2KA3-1 of the third intermediate relay;

[0080] The outgoing terminal of the first normally closed contact 2KA3-1 of the third intermediate relay is connected to the incoming terminal of the second normally closed contact 2KA1-4 of the first intermediate relay;

[0081] The 1X15 terminal of the line protection and measurement and control device 2n is connected to the X6.3 terminal of the circuit breaker 2QF and the 1X19 terminal of the line protection and measurement and control device 2n; the X6.4 terminal of the circuit breaker 2QF is connected to the X6.14 terminal of the circuit breaker 2QF; the X6.13 terminal of the circuit breaker 2QF is connected to the incoming terminal of the second normally closed contact 2KA1-4 of the first intermediate relay; the 1X15 terminal of the line protection and measurement and control device 2n and the 1X16 terminal of the line protection and measurement and control device 2n are closed to realize the remote automatic tripping of the circuit breaker 2QF.

[0082] The outgoing terminals of the first normally closed contact 2KA1-1 of the first intermediate relay are respectively connected to the incoming terminals of the trip button 2SS; the outgoing terminals of the trip button 2SS are connected to the X6.3 terminals of the circuit breaker 2QF; the trip button 2SS realizes the remote manual tripping of the circuit breaker 2QF.

[0083] The outgoing terminals of the first normally closed contact 2KA1-1 of the first intermediate relay are respectively connected to the incoming terminals of the first contact of the time-delay closing relay 2KT1-1; the outgoing terminals of the first contact of the time-delay closing relay 2KT1-1 are connected to the X6.3 terminals of the circuit breaker 2QF; the time-delay closing relay 2KT1-1 realizes the rapid paralleling and releasing of the circuit breaker 2QF.

[0084] The outgoing terminals of the first normally closed contact 2KA1-1 of the first intermediate relay are respectively connected to the 1X18 terminals of the busbar cabinet 3n; the 1X19 terminals of the busbar cabinet 3n are connected to the X6.3 terminals of the circuit breaker 2QF; the above circuit realizes remote control of the busbar cabinet 3n.

[0085] The outgoing terminals of the first normally closed contact 2KA1-1 of the first intermediate relay are connected to the X5.5 terminal and the X6.5 terminal of the circuit breaker 2QF respectively; the X5.6 terminal and the X6.6 terminal of the circuit breaker 2QF are connected to the incoming terminal of the coil 2KA2 of the second intermediate relay and the incoming terminal of the closing indicator light 2HW; the outgoing terminals of the coil 2KA2 of the second intermediate relay and the outgoing terminals of the closing indicator light 2HW are connected to the incoming terminal of the second normally closed contact 2KA1-4 of the first intermediate relay;

[0086] The outgoing line end of the first normally closed contact 2KA1-1 of the first intermediate relay is respectively connected to the incoming line end of the first normally open contact 2KA2-1 of the second intermediate relay and the incoming line end of the first normally closed contact 2KA2-2 of the second intermediate relay; the outgoing line end of the first normally open contact 2KA2-1 of the second intermediate relay and the outgoing line end of the first normally closed contact 2KA2-2 of the second intermediate relay are respectively connected to the closing indicator light 2HR and the opening indicator light 2HG; the closing indicator light 2HR and the opening indicator light 2HG realize closing indication and opening indication.

[0087] The outgoing terminals of the first normally closed contact 2KA1-1 of the first intermediate relay are respectively connected to the incoming terminals of the reset button 2SB; the outgoing terminal of the reset button 2SB is connected to the incoming terminal of the first contact 2KT2-1 of the delayed disconnection time relay; the outgoing terminal of the first contact 2KT2-1 of the delayed disconnection time relay is connected to the incoming terminal of the yellow light indicator 2HY, the incoming terminal of the third intermediate relay coil 2KA3 and the incoming terminal of the delayed disconnection time relay coil 2KT2; the outgoing terminals of the yellow light indicator 2HY, the outgoing terminals of the third intermediate relay coil 2KA3 and the outgoing terminals of the delayed disconnection time relay coil 2KT2 are all connected to the incoming terminal of the second normally closed contact 2KA1-4 of the first intermediate relay; the yellow light indicator 2HY of the above circuit realizes fault indication, and the connection of the reset button 2SB can realize the resetting of the circuit.

[0088] The outgoing terminals of the first normally closed contact 2KA1-1 of the first intermediate relay are respectively connected to the fifth terminal of the busbar switch 3SA3, and the sixth terminal of the busbar switch 3SA3 is connected to the X5.9 terminal of the busbar circuit breaker 3QF; the X5.10 terminal of the busbar circuit breaker 3QF is connected to the X5.3 terminal of the circuit breaker 1QF of the 1# incoming line cabinet; the X5.4 terminal of the circuit breaker 1QF of the 1# incoming line cabinet is connected to the incoming terminal of the delayed closing relay coil 2KT1; the incoming and outgoing terminals of the delayed closing relay coil 2KT1 are connected to the incoming terminal of the second normally closed contact 2KA1-4 of the first intermediate relay; the above circuit realizes the rapid parallelization of the circuit.

[0089] The output terminals of the first normally closed contact 2KA1-1 of the first intermediate relay are respectively connected to the input terminals of the power quality meter 2PM and the 24V power conversion module AD; the output terminals of the power quality meter 2PM and the 24V power conversion module AD are both connected to the input terminals of the second normally closed contact 2KA1-4 of the first intermediate relay; the positive and negative poles of the 24V power conversion module AD are both connected to the X8.3 and X8.4 terminals of the circuit breaker 2QF, providing power for the circuit breaker 2QF.

[0090] In order to achieve the above technical effects, in the incoming line cabinet control circuit of the line protection measurement and control device in this embodiment, as shown in FIG. Figure 1-Figure 5 As shown, the first power supply 2L1 passing through the third fuse FU3 is connected to the 3X15 terminal of the line protection and control device 2n, the S33.1 terminal, the S31.1 terminal, the S6.11 terminal, the S6.9 terminal of the circuit breaker 2QF, the first contact 2SS-1 of the trip button, and the fifth terminal of the transfer switch 2SA;

[0091] The S33.4, S31.4, S6.12 and S6.10 terminals of the circuit breaker 2QF are respectively connected to the 1X04, 1X05, 1X07 and 1X08 terminals of the line protection and control device 2n;

[0092] The outgoing terminal of the first contact 2SS-1 of the trip button is connected to the 1X10 terminal of the line protection and control device 2n;

[0093] The sixth terminal of the switch 2SA is connected to the 1X12 terminal of the line protection and measurement and control device 2n;

[0094] The 3X16 terminal of the line protection and measurement and control device 2n is short-circuited with the 1X04-1 terminal, 1X05-1 terminal, 1X07-1 terminal, 1X08-1 terminal, and 1X13 terminal of the line protection and measurement and control device 2n and then connected to the neutral line 2N.

[0095] The 3X15 terminal of the line protection measurement and control device 2n provides power to the line protection measurement and control device 2n;

[0096] The S33.1 terminal of the circuit breaker 2QF and the S33.4 terminal of the circuit breaker 2QF are the circuit breaker working positions. After being connected, the line protection measurement and control device 2n can receive the working status of the circuit breaker 2QF.

[0097] The S6.11 terminal of the circuit breaker 2QF and the S6.12 terminal of the circuit breaker 2QF are the circuit breaker closing position after connection; the line protection measurement and control device 2n can receive the circuit breaker closing position working status of the circuit breaker 2QF.

[0098] The S31.1 terminal of the circuit breaker 2QF and the S31.4 terminal of the circuit breaker 2QF are the circuit breaker test working positions. After connection, the line protection measurement and control device 2n can receive it, and the circuit breaker 2QF is in the circuit breaker test working state.

[0099] The S6.10 terminal of the circuit breaker 2QF and the S6.9 terminal of the circuit breaker 2QF are in the circuit breaker open position. After the connection, the line protection measurement and control device 2n can receive that the circuit breaker 2QF is in the working state of the circuit breaker open position.

[0100] The first contact 2SS-1 of the trip button is in the manual tripping and locking state. After the connection, the line protection measurement and control device 2n can receive it, and the circuit breaker 2QF is in the circuit breaker manual tripping and locking state.

[0101] After the sixth terminal of the transfer switch 2SA is connected to the fifth terminal of the transfer switch 2SA, it is in the manual remote control position. After the connection, the line protection measurement and control device 2n can receive it and control the circuit breaker 2QF to be in a remote working state.

[0102] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A line cabinet control circuit using a line protection measurement and control device, characterized in that: include: First power supply line side (2L1-2L3, 2N); Current transformers (2TA1-2TA6), a plurality of which are provided on the first power supply line side (2L1-2L3, 2N); An air circuit breaker (2QF), connecting the first power supply line side (2L1-2L3, 2N) to one side of the air circuit breaker (2QF); A second power supply incoming line side (2L21-2L3, 2N) is connected to the second power supply incoming line side (2L21-2L3, 2N) on the other side of the air circuit breaker (2QF); control circuit; A line protection measurement and control device (2n) is provided in the control circuit; when the line protection measurement and control device (2n) performs line protection, the control circuit switches the lines of the first power supply incoming line side (2L1-2L3, 2N) and the second power supply incoming line side (2L21-2L3, 2N).

2. The incoming line cabinet control circuit using the line protection measurement and control device according to claim 1 is characterized in that: The first power supply incoming line side (2L1-2L3, 2N) is connected to the incoming line side of the knife fuse switch (QS); the outgoing line end of the knife fuse switch (QS) is connected to one end of a surge protector (SPD); and the other end of the surge protector (SPD) is grounded.

3. The incoming line cabinet control circuit using the line protection measurement and control device according to claim 1 is characterized in that: The current transformer (2TA1-2TA6) further includes: A first group of current transformers (2TA1-2TA3) is connected to the S1 terminals of the first group of current transformers (2TA1-2TA3) at the 4X13 terminals, the 4X15 terminals, and the 4X17 terminals of the line protection and measurement and control device (2n); and the S2 terminals of the first group of current transformers (2TA1-2TA3) are short-circuited and then grounded; The 4X14 terminal, the 4X16 terminal, and the 4X18 terminal of the line protection measurement and control device (2n) are short-circuited and then grounded; The power quality meter (2PM) is connected to the AL1.I terminal, BL2.I terminal, and CL3.I terminal of the power quality meter (2PM) at the 4X7 terminal, 4X9 terminal, and 4X11 terminal of the line protection measurement and control device (2n); and the 4X8 terminal, 4X10 terminal, and 4X12 terminal of the line protection measurement and control device (2n) are short-circuited and then grounded; An ammeter (2PA1-2PA3) is connected to the AL1.K, BL2.K, and CL3.K terminals of the power quality meter (2PM) at one end of the ammeter (2PA1-2PA3); the other end of the ammeter (2PA1-2PA3) is connected to a second set of current transformers (2TA4-2TA6); and the other end of the second set of current transformers (2TA4-2TA6) is short-circuited and grounded.

4. The incoming line cabinet control circuit using the line protection measurement and control device according to claim 1, characterized in that: The control circuit further includes: a first power supply (2L1); A first fuse (2FU1), the first power source (2L1) being connected to an inlet terminal of the first fuse (2FU1); The first normally closed contact (2KA1-1) of the first intermediate relay is connected to the first normally closed contact (2KA1-1) input terminal of the first intermediate relay on the output terminal of the first fuse (2FU1); Second power supply (1L); A second fuse (2FU2), the second power supply (2L2) being connected to an inlet terminal of the second fuse (2FU2); The first normally open contact (2KA1-2) of the first intermediate relay is connected to the first normally open contact (2KA1-2) input terminal of the first intermediate relay on the output terminal of the second fuse (2FU2); the output terminal of the second fuse (2FU2) is connected to the input terminal of the first intermediate relay coil (2KA1); the output terminal of the first intermediate relay coil (2KA1) is connected to the first neutral line (1N); The output terminal of the first normally closed contact (2KA1-1) of the first intermediate relay is connected to the output terminal of the first normally open contact (2KA1-2) of the first intermediate relay; and then connected to the input terminal of the energy storage circuit of the circuit breaker (2QF); The outlet terminal of the energy storage circuit of the circuit breaker (2QF) is connected to the inlet terminal of the second normally open contact (2KA1-3) of the first intermediate relay and the inlet terminal of the second normally closed contact (2KA1-4) of the first intermediate relay; the outlet terminal of the second normally open contact (2KA1-3) of the first intermediate relay is connected to the first neutral line (1N); the outlet terminal of the second normally closed contact (2KA1-4) of the first intermediate relay is connected to the second neutral line (2N); After the outgoing terminals of the first normally closed contact (2KA1-1) of the first intermediate relay and the first normally open contact (2KA1-2) of the first intermediate relay are connected, they are connected to the incoming terminal of the rotary button (3SA1) of the bus coupling cabinet and the first terminal of the switching switch (2SA); the outgoing terminal of the rotary button (3SA1) of the bus coupling cabinet is connected to the third terminal of the switching switch (2SA); The fourth terminal of the switch (2SA) is connected to the incoming terminal of the start button (2SF); the outgoing terminal of the start button (2SF) is respectively connected to the X6.1 terminal of the circuit breaker (2QF) and the 1X14 terminal of the line protection measurement and control device (2n); The second terminal of the switching switch (2SA) is connected to the 1X16 terminal of the line protection measurement and control device (2n); The X6.2 terminal of the circuit breaker (2QF) is connected to the X6.7 terminal of the circuit breaker (2QF); The X6.8 terminal of the circuit breaker (2QF) is connected to the incoming terminal of the first normally closed contact (2KA3-1) of the third intermediate relay; The outgoing terminal of the first normally closed contact (2KA3-1) of the third intermediate relay is connected to the incoming terminal of the second normally closed contact (2KA1-4) of the first intermediate relay; The 1X15 terminal of the line protection measurement and control device (2n) is connected to the X6.3 terminal of the circuit breaker (2QF) and the 1X19 terminal of the line protection measurement and control device (2n); the X6.4 terminal of the circuit breaker (2QF) is connected to the X6.14 terminal of the circuit breaker (2QF); the X6.13 terminal of the circuit breaker (2QF) is connected to the incoming line terminal of the second normally closed contact (2KA1-4) of the first intermediate relay; The outgoing terminals of the first normally closed contact (2KA1-1) of the first intermediate relay are respectively connected to the incoming terminals of the trip button (2SS); the outgoing terminals of the trip button (2SS) are connected to the X6.3 terminals of the circuit breaker (2QF); The outgoing terminals of the first normally closed contact (2KA1-1) of the first intermediate relay are respectively connected to the incoming terminals of the first contact of the time-delay closing relay (2KT1-1); the outgoing terminals of the first contact of the time-delay closing relay (2KT1-1) are connected to the X6.3 terminals of the circuit breaker (2QF); The outgoing terminals of the first normally closed contact (2KA1-1) of the first intermediate relay are respectively connected to the 1X18 terminals of the bus coupling cabinet (3n); the 1X19 terminals of the bus coupling cabinet (3n) are connected to the X6.3 terminals of the circuit breaker (2QF); The outgoing line end of the first normally closed contact (2KA1-1) of the first intermediate relay is connected to the X5.5 terminal and the X6.5 terminal of the circuit breaker (2QF) respectively; the X5.6 terminal and the X6.6 terminal of the circuit breaker (2QF) are connected to the incoming line end of the second intermediate relay coil (2KA2) and the incoming line end of the closing indicator light (2HW); the outgoing line end of the second intermediate relay coil (2KA2) and the outgoing line end of the closing indicator light (2HW) are connected to the incoming line end of the second normally closed contact (2KA1-4) of the first intermediate relay; The outgoing line end of the first normally closed contact (2KA1-1) of the first intermediate relay is connected to the incoming line end of the first normally open contact (2KA2-1) of the second intermediate relay and the incoming line end of the first normally closed contact (2KA2-2) of the second intermediate relay respectively; the outgoing line end of the first normally open contact (2KA2-1) of the second intermediate relay and the outgoing line end of the first normally closed contact (2KA2-2) of the second intermediate relay are connected to the closing indicator light (2HR) and the opening indicator light (2HG) respectively; The output terminals of the first normally closed contact (2KA1-1) of the first intermediate relay are respectively connected to the input terminals of the reset button (2SB); the output terminal of the reset button (2SB) is connected to the input terminal of the first contact (2KT2-1) of the time-delayed disconnection time relay; the output terminal of the first contact (2KT2-1) of the time-delayed disconnection time relay is connected to the input terminal of the yellow light indicator (2HY), the input terminal of the third intermediate relay coil (2KA3), and the input terminal of the time-delayed disconnection time relay coil (2KT2); the output terminals of the yellow light indicator (2HY), the output terminal of the third intermediate relay coil (2KA3), and the output terminal of the time-delayed disconnection time relay coil (2KT2) are all connected to the input terminal of the second normally closed contact (2KA1-4) of the first intermediate relay; The outgoing terminals of the first normally closed contact (2KA1-1) of the first intermediate relay are respectively connected to the fifth terminal of the bus coupling switch (3SA3); the sixth terminal of the bus coupling switch (3SA3) is connected to the X5.9 terminal of the bus coupling circuit breaker (3QF); the X5.10 terminal of the bus coupling circuit breaker (3QF) is connected to the X5.3 terminal of the circuit breaker (1QF) of the 1# incoming line cabinet; the X5.4 terminal of the circuit breaker (1QF) of the 1# incoming line cabinet is connected to the incoming terminal of the delayed closing relay coil (2KT1); the incoming and outgoing terminals of the delayed closing relay coil (2KT1) are connected to the incoming terminal of the second normally closed contact (2KA1-4) of the first intermediate relay; The output end of the first normally closed contact (2KA1-1) of the first intermediate relay is respectively connected to the input end of the power quality meter (2PM) and the 24V power conversion module (AD); the output ends of the power quality meter (2PM) and the 24V power conversion module (AD) are both connected to the input end of the second normally closed contact (2KA1-4) of the first intermediate relay; the positive and negative poles of the 24V power conversion module (AD) are both connected to the X8.3 and X8.4 terminals of the circuit breaker (2QF) to provide power for the circuit breaker (2QF).

5. The incoming line cabinet control circuit using the line protection measurement and control device according to claim 4, characterized in that: A first power supply (2L1) passing through a third fuse (FU3) is connected to the 3X15 terminal of the line protection and measurement control device (2n), the S33.1 terminal, the S31.1 terminal, the S6.11 terminal, the S6.9 terminal, the first contact (2SS-1) of the trip button, and the fifth terminal of the switch (2SA); The S33.4 terminal, S31.4 terminal, S6.12 terminal, and S6.10 terminal of the circuit breaker (2QF) are respectively connected to the 1X04 terminal, 1X05 terminal, 1X07 terminal, and 1X08 terminal of the line protection measurement and control device (2n); The outgoing terminal of the first contact (2SS-1) of the trip button is connected to the 1X10 terminal of the line protection measurement and control device (2n); The sixth terminal of the switch (2SA) is connected to the 1X12 terminal of the line protection measurement and control device (2n); The 3X16 terminal of the line protection measurement and control device (2n) is short-circuited with the 1X04-1 terminal, 1X05-1 terminal, 1X07-1 terminal, 1X08-1 terminal, and 1X13 terminal of the line protection measurement and control device (2n) and then connected to the neutral line (2N).

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