Portable distribution network circuit breaker experiment tool device

Abstract

The invention discloses a portable distribution network circuit breaker experiment tool device which comprises a box body, a box cover and an operation panel, the operation panel is arranged on the inner side of the box body, a power interface is arranged on the outer side of a test box, a cable storage bin is arranged on a test tool, sundries such as detection lines can be placed in order, and the sundries can be conveniently taken at any time during work; the power converter, the opening and closing pulse receiving circuit, the opening and closing signal holding circuit and the closing and opening position signal loop are arranged in the box body, and whether the circuit breaker can achieve rapid and reliable opening and closing operation under the normal operation condition or not is checked through the opening and closing signal receiving loop through the opening and closing receiving loop; the portable distribution network circuit breaker experiment tool device is simple in structure, novel in design and suitable for operation experiments under different voltage grades.

Description

Technical Field

[0001] The invention relates to the technical field of circuit breaker testing, and in particular to a portable distribution network circuit breaker testing tooling device. Technical Background

[0002] GIS (Gas Insulated Switchgear) is composed of circuit breakers, disconnectors, grounding switches, transformers, lightning arresters, busbars, connectors and outgoing line terminals. The circuit breakers of GIS need to reliably break various fault currents and load currents. Therefore, they need to be subjected to multiple operation tests before leaving the factory. The circuit breaker transmission test is to ensure that the circuit breaker can quickly and reliably cut off the current when needed and effectively protect the power system. The normal transmission test can ensure that the circuit breaker works normally under normal operating conditions and avoid unnecessary failures in the power system. At the same time, the circuit breaker transmission test is also helpful to detect the transmission mechanism and control To detect the failure of the control system and repair and maintain it in time to ensure the normal operation of the power system. When the circuit breaker is tested for relay protection, it is necessary to connect the primary part on both sides of the circuit breaker and simulate the addition of current for testing. Due to the lack of special wiring devices or experimental auxiliary devices, at present, the relay protection personnel generally climb the insulating ladder to clamp the test wires to the wire parts on both sides of the circuit breaker for hanging the wires. Since the existing pole-mounted equipment is produced by different manufacturers, the models are relatively complex, and the operating voltage levels of various manufacturers are different. The traditional inspection method is time-consuming and labor-intensive, and it is easy to cause errors in the inspection results. It is impossible to determine whether the secondary terminals are open or closed when a fault occurs, and whether there is a refusal to operate.

[0003] Therefore, it is necessary to develop a portable distribution network circuit breaker experimental tooling device, which can not only detect circuit breakers of different models and voltage levels, but also simplify the inspection process of circuit breakers, thereby shortening the protection debugging time and improving work efficiency. Summary of the invention

[0004] The present invention aims at solving the above problems and provides a portable distribution network circuit breaker test tooling device with a reasonable structure, which can be applied to terminals with various operating voltages. It can perform relay protection transmission experiments on control terminals of different manufacturers without changing the lines or replacing the equipment. It can perform opening and closing operations and protection transmission tests on circuit breakers, which not only improves the efficiency but also ensures the accuracy of the test results.

[0005] In order to achieve the above effects, the technical solution adopted by the present invention is as follows:

[0006] A portable distribution network circuit breaker experimental tooling device, comprising a box body, a box cover and an operation panel, wherein the top of the box body is rotatably connected to the box cover through a hinge, the top of the box body is provided with an operation panel, the front side of the box body is rotatably connected to a handle through a rotating shaft, a power interface is provided on the left side outside the box body, a power converter and a power module are provided on the left side inside the box body, and a circuit system is provided in the middle position inside the box body;

[0007] The circuit system includes an opening and closing pulse receiving circuit, an opening and closing signal holding circuit, and an opening and closing position signal loop. The power converter is connected to the opening and closing pulse receiving circuit, the output end of the opening and closing pulse receiving circuit is connected to the opening and closing signal holding circuit, and the output end of the opening and closing signal holding circuit is connected to the opening and closing position signal loop.

[0008] Preferably, a power switch is provided in the upper left corner of the surface of the operation panel, a voltage selection knob is provided below the power switch, a closing light is provided below the voltage selection knob, an opening light is provided in parallel on the right side of the closing light, and the middle of the operation panel is a wiring terminal area, which is divided into a current wiring area and a control wiring area, six current wiring terminals are arranged horizontally in the current wiring area, and five control wiring terminals are arranged in sequence from right to left in the control wiring area.

[0009] Preferably, the closing and opening pulse receiving circuit includes: a conversion switch, a 110V closing relay, a 110V opening relay, a 220V closing relay and a 220V opening relay, the input end of the conversion switch includes four contacts, including a first contact, a second contact, a third contact and a fourth contact, the output end of the conversion switch includes four contacts, a fifth contact, a sixth contact, a seventh contact and an eighth contact, the first contact and the fifth contact of the conversion switch control the 110V closing relay, the second contact and the sixth contact control the 110V opening relay, the third contact and the seventh contact of the conversion switch control the 220V closing relay, and the fourth contact and the eighth contact control the 220V opening relay.

[0010] Preferably, the closing and opening holding circuit is divided into a closing holding circuit and an opening protection circuit, including six normally open contacts and two normally closed contacts. The closing holding circuit includes a first normally open contact, a third normally open contact, a fifth normally open contact, a normally closed contact and a closing holding relay. The opening protection circuit includes a second normally open contact, a fourth normally open contact, a sixth normally open contact, a fifth normally closed contact and an opening holding relay. The three normally open contacts in the holding circuit are connected in parallel, the normally open contact and the normally closed contact are connected in series, and the fifth normally closed contact and the sixth normally closed contact are in an electrical interlocking relationship.

[0011] Preferably, the closing / opening position signal circuit comprises: a control box power supply terminal, an opening contact, a closing contact and a control box common terminal, and the opening contact is connected in parallel with the closing contact.

[0012] Preferably, a cable storage compartment for storing cables is provided inside the box body near the right side, and the cable storage compartment is provided with an opening on the right side surface of the box body. The power interface is an AC220V aviation plug.

[0013] Preferably, the power converter is connected to a voltage selection knob, the power switch is arranged in series on an input circuit of the power converter, and the voltage selection knob adopts a 3-speed 2-stage LW26 series switching switch.

[0014] Preferably, the open contact and the closed contact are arranged in parallel, and when the open contact is closed, the open light on the control panel lights up to indicate the open position, and when the closed contact is closed, the closed light on the control panel lights up to indicate the closed position.

[0015] Preferably, the outer side of the handle is provided with an anti-slip cover, and the surface of the anti-slip cover is provided with a plurality of anti-slip grooves, and two diodes are connected in series on the output circuit of the power module.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In the portable distribution network circuit breaker experimental tooling device of the present invention, the box cover and the box body are rotatably fixed by hinges, so that when the box cover is opened, the box cover has a support and only needs to be flipped at a certain angle without removing the box cover, thereby avoiding the problem of pulling the connecting wires inside the box body when opening the box cover.

[0018] 2. The portable distribution network circuit breaker experimental tooling device of the present invention can select different voltage levels through the voltage selection knob. There is no need to manually replace the 110V or 220V relay, which omits the wiring process during the test and avoids many wiring problems. It reduces the problems caused by frequent replacement of relays or loosening of the relay base interface and poor contact, thereby improving the experimental effect and experimental safety.

[0019] 3. The power switch and indicator light are installed on the operation panel of the tooling test box, which is convenient for the test personnel to observe. Placing the interconnected circuits in the tooling test box helps to make the surface of the tooling test box neat and the display intuitive. A handle with anti-slip grooves is set on the box body for easy carrying. This arrangement is easy to operate and saves space. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 This is a structural diagram of a portable distribution network circuit breaker experimental tooling proposed by the present invention;

[0022] Figure 2 A schematic diagram of the interior of a portable distribution network circuit breaker experimental tool box proposed for the invention;

[0023] Figure 3 A schematic diagram of the circuit system in a portable distribution network circuit breaker experimental tooling proposed for the invention;

[0024] Figure 4 The circuit diagram of the opening and closing pulse receiving circuit proposed by the present invention;

[0025] Figure 5 This is a circuit diagram for maintaining the opening and closing signals proposed by the present invention.

[0026] In the figure:

[0027] 1. Box body; 2. Box cover; 3. Operation panel; 4. Power interface; 5. Handle; 6. Power converter; 7. Circuit system; 71. Opening and closing pulse receiving circuit; 711. Transfer switch; 712. 110V closing relay; 713. 110V opening relay; 714. 220V closing relay; 715. 220V opening relay; 72. Opening and closing signal holding circuit; 721. Normally open contact; 722. Normally closed contact; 723 , opening holding relay; 724, closing holding relay; 73, closing and opening position signal circuit; 731, control box power supply terminal; 732, opening contact; 733, closing contact; 734, control box common terminal; 8, power switch; 9, voltage selection knob; 10, closing light; 11, opening light; 12, circuit wiring area; 13, control wiring area; 14, circuit wiring terminals; 15, control wiring terminals; 16, cable storage compartment; 17, power module. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can usually be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0029] Example 1

[0030] A portable distribution network circuit breaker experimental tooling device, comprising a box body 1, a box cover 2 and an operation panel 3, wherein the top of the box body 1 is rotatably connected to the box cover 2 through a hinge, the top of the box body 1 is provided with an operation panel 3, the front side of the box body 1 is rotatably connected to a handle 5 through a rotating shaft, a power interface 4 is provided on the left side of the outer wall of the box body 1, a power converter 6 and a power module 17 are provided on the left side inside the box body 1, and a circuit system 7 is provided in the middle position inside the box body 1;

[0031] The circuit system 7 includes an opening and closing pulse receiving circuit 71, an opening and closing signal holding circuit 72, and an opening and closing position signal circuit 73. The power converter 6 is connected to the opening and closing pulse receiving circuit 71, the output end of the opening and closing pulse receiving circuit 71 is connected to the opening and closing signal holding circuit 72, and the output end of the opening and closing signal holding circuit 72 is connected to the opening and closing position signal circuit 73.

[0032] like Figure 1 As shown, the top of the box body 1 is connected to a box cover 2 by a hinge, which is convenient for opening and closing. The design of the box cover 2 ensures the sealing of the device, thereby protecting the internal components from the influence of the external environment. An operation panel 3 is provided on the top of the box body 1 for executing a specific test process. The front side of the box body 1 is connected to a handle by a rotating shaft for easy carrying. A power interface 4 is provided on the outside of the box body 1, which is connected to a power converter 6 and a circuit system 7 to ensure the normal operation of the device. The power module 17 is a backup power supply to provide working power for the device.

[0033] Furthermore, a power switch 8 is provided at the upper left corner of the surface of the operation panel 3, a voltage selection knob 9 is provided below the power switch 8, a closing light 10 is provided below the voltage selection knob 9, and an opening light 11 is provided in parallel on the right side of the closing light 10. The middle of the operation panel 3 is a wiring terminal area, which is divided into a current wiring area 12 and a control wiring area 13. The current wiring area 12 is horizontally provided with six current wiring terminals 14, and the control wiring area 13 is sequentially provided with five control wiring terminals 15 from right to left.

[0034] The power switch 8 is located at the upper left corner of the surface of the operation panel 3 and is used to control the power on and off. The voltage selection knob 9 is located below the power switch 8. A 3-speed 2-stage LW26 series switch is used to select different voltage levels. The closing light 10 and the opening light 11, the closing light 10 is located below the voltage selection knob 9, and the opening light 11 is arranged in parallel on the right side of the closing light 10, for indicating the closing and opening status of the circuit breaker. The terminal area, the middle part of the operation panel 3 is the terminal area, which is divided into a current wiring area 12 and a control wiring area 13. The current terminal is horizontally provided with six current wiring terminals 14, and the control terminal is sequentially provided with five control wiring terminals 15 from right to left, which is convenient for switching back and forth between terminals of various voltage levels.

[0035] Furthermore, the closing and opening pulse receiving circuit includes: a conversion switch 711, a 110V closing relay 712, a 110V opening relay 713, a 220V closing relay 714 and a 220V opening relay 715. The input end of the conversion switch 711 includes four contacts, including a first contact, a second contact, a third contact and a fourth contact. The output end of the conversion switch 711 includes four contacts, a fifth contact, a sixth contact, a seventh contact and an eighth contact. The first contact and the fifth contact of the conversion switch 711 control the 110V closing relay 712, the second contact and the sixth contact control the 110V opening relay 713, the third contact and the seventh contact of the conversion switch 711 control the 220V closing relay 714, and the fourth contact and the eighth contact control the 220V opening relay 715.

[0036] like Figure 4 As shown, in this embodiment, the input end of the conversion switch 711 includes a first contact, a second contact, a third contact and a fourth contact, wherein the first contact and the third contact are the first input end, and the second contact and the fourth contact are the second input end; the output end of the conversion switch 711 includes a fifth contact, a sixth contact, a seventh contact and an eighth contact, the first contact and the fifth contact of the conversion switch 711 control the 110V closing relay, the second contact and the sixth contact control the 110V opening relay, the third contact and the seventh contact of the conversion switch 711 control the 220V closing relay, and the fourth contact and the eighth contact control the 220V opening relay.

[0037] The closing and opening signal receiving circuit 71 of the present invention adopts a common plug-in intermediate relay. For terminals with various operating voltages, there is no need to change the circuit or replace the equipment. Only the relay "coil" needs to be plugged in to meet the requirements of relay protection experiments for terminals of various voltage levels. It can be applicable to terminals with various operating voltages, and relay protection transmission experiments can be performed on control terminals of different manufacturers without changing the circuit or replacing the equipment.

[0038] The closing and opening holding circuit 72 is divided into a closing holding circuit and an opening protection circuit, including six normally open contacts 721 and two normally closed contacts 722. The closing holding circuit includes a first normally open contact, a third normally open contact, a fifth normally open contact, a normally closed contact and a closing holding relay 723. The opening protection circuit includes a second normally open contact, a fourth normally open contact, a sixth normally open contact, a fifth normally closed contact and an opening holding relay 724. The three normally open contacts 721 in the holding circuit are connected in parallel, the normally open contact 721 and the normally closed contact 722 are connected in series, and the fifth normally closed contact and the sixth normally closed contact are in an electrical interlocking relationship.

[0039] In the closing holding circuit, when the closing holding relay 723 is actuated, the sixth normally closed contact is closed to ensure the continuation of the closing operation, and the fifth normally closed contact must be disconnected to prevent the false triggering of the opening operation. In the opening protection circuit, when the opening holding relay 724 is actuated, the fifth normally closed contact is closed to ensure the continuation of the opening operation. At this time, the sixth normally closed contact must be disconnected to prevent the false triggering of the closing operation.

[0040] The closing and opening signal holding circuit 72 is reliable and practical. It adopts 220V AC power to hold the closing and opening instantaneous signal. It is separated from the closing and opening signal judgment receiving circuit and has nothing to do with the operating voltage of the control box. It meets the requirements of terminal relay protection experiments of various voltage levels and combines a comprehensive comparison of economy and practicality.

[0041] The closing / opening position signal circuit 73 comprises: a control box power supply terminal 731 , an opening contact 732 , a closing contact 733 and a control box common terminal 734 , wherein the opening contact 732 is connected in parallel with the closing contact 733 .

[0042] In an embodiment of the present invention, the closing / opening position signal circuit 73 includes: a control box power supply terminal 731, an opening contact 732, a closing contact 733 and a control box common terminal 734. The control box power supply terminal 731 forms a circuit with the control box common terminal 734 through the opening contact 732 and the closing contact 733. The opening contact 732 and the closing contact 733 are arranged in parallel. When the opening contact is closed, the opening light on the control operation panel 3 lights up to display the opening position; when the opening holding relay coil is not energized, the closing contact is closed, the closing light on the operation panel 3 lights up to display the closing position, the opening contact 732 is the normally open contact of the opening holding relay, and the closing contact 733 is the normally closed contact of the opening holding relay.

[0043] Furthermore, a cable storage compartment 16 for storing cables is arranged near the right side inside the box 1. The cable storage compartment 16 is provided with an opening on the right side of the box 1, and a cable storage compartment 16 is designed on the far right to facilitate the storage of test cables.

[0044] The power converter 6 is connected to the voltage selection knob 9, the power switch 8 is arranged in series on the input line of the power converter 6, and the voltage selection knob 9 adopts a 3-speed 2-stage LW26 series switching switch.

[0045] The power interface 4 is an AC220V aviation plug. The power interface 4 is arranged on the outside of the box body 1. The AC220V aviation plug is adopted to ensure the stability and safety of the connection. The power converter 6 is responsible for converting the external power into a voltage suitable for the internal circuit and is connected to the voltage selection knob 9 to adapt to different voltage requirements.

[0046] like Figure 1 As shown, in the embodiment of the present invention, the AC220V power supply is introduced on the left side of the box 1 through an aviation plug, and a power switch 8 can control the on and off, and the voltage selection knob 9 uses a 3-speed 2-stage LW26 series switch, and the 110V and 220V relay signal receiving circuits are switched by the conversion switch. When the switch is at the 0 o'clock position, the device does not work, and the closing light 10 and the opening light 11 indicate the current closing and opening working status.

[0047] Furthermore, the outer side of the handle 5 is provided with an anti-slip cover, and the surface of the anti-slip cover is provided with a plurality of anti-slip grooves. The outer side of the handle 5 is provided with an anti-slip cover, and the surface of the anti-slip cover is provided with a plurality of anti-slip grooves. By providing an anti-slip cover on the outer side of the handle 5, the staff can use it more comfortably.

[0048] Two diodes are connected in series on the output line of the power module 17, the cathode of the first diode is connected to the input end of the switching switch, and the cathode of the second diode is connected to the second input end of the switching switch. By connecting two diodes in series on the output line of the power module 17 and connecting them to the input end and the second input end of the switching switch respectively, the circuit can be effectively protected, the unidirectional conduction of the power supply can be ensured, and the stability and safety of the system can be improved.

[0049] Working principle: When in use, insert the AC220V aviation plug into the power socket, turn on the power switch 8, select the appropriate voltage gear through the voltage selection knob 9, connect the current terminal 14 of the distribution network circuit breaker to be tested to the current wiring area 12, and the control terminal 15 to the control wiring area 13, send the opening and closing signal through the opening and closing pulse receiving circuit 71, observe the status of the closing light 10 and the opening light 11, confirm whether the opening and closing action of the circuit breaker is normal, record the experimental data, and analyze it.

[0050] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A portable distribution network circuit breaker test tool device, comprising a box body (1), a box cover (2) and an operation panel (3), characterized in that: The top of the box (1) is rotatably connected to a box cover (2) via a hinge, the top of the box (1) is provided with an operation panel (3), the front side of the box (1) is rotatably connected to a handle (5) via a rotating shaft, a power interface (4) is provided on the left side outside the box (1), a power converter (6) and a power module (17) are provided on the left side inside the box (1), and a circuit system (7) is provided in the middle of the box (1); The circuit system (7) comprises an opening and closing pulse receiving circuit (71), an opening and closing signal holding circuit (72), and a closing and opening position signal circuit (73); the power converter (6) is connected to the opening and closing pulse receiving circuit (71); the output end of the opening and closing pulse receiving circuit (71) is connected to the opening and closing signal holding circuit (72); and the output end of the opening and closing signal holding circuit (72) is connected to the closing and opening position signal circuit (73).

2. A portable distribution network circuit breaker test tooling device according to claim 1, characterized in that: A power switch (8) is provided at the upper left corner of the surface of the operation panel (3), a voltage selection knob (9) is provided below the power switch (8), a closing lamp (10) is provided below the voltage selection knob (9), and an opening lamp (11) is provided in parallel on the right side of the closing lamp (10). The middle of the operation panel (3) is a wiring terminal area, which is divided into a current wiring area (12) and a control wiring area (13). Six current wiring terminals (14) are arranged horizontally in the current wiring area (12), and five control wiring terminals (15) are arranged in sequence from right to left in the control wiring area (13).

3. A portable distribution network circuit breaker test tooling device according to claim 1, characterized in that: The closing and opening pulse receiving circuit comprises: a conversion switch (711), a 110V closing relay (712), a 110V opening relay (713), a 220V closing relay (714) and a 220V opening relay (715); the input end of the conversion switch (711) comprises four contacts, including a first contact, a second contact, a third contact and a fourth contact; the output end of the conversion switch (711) comprises four contacts, including a fifth contact, a sixth contact, a seventh contact and an eighth contact; the first contact and the fifth contact of the conversion switch (711) control the 110V closing relay (712), the second contact and the sixth contact control the 110V opening relay (713); the third contact and the seventh contact of the conversion switch (711) control the 220V closing relay (714), and the fourth contact and the eighth contact control the 220V opening relay (715).

4. A portable distribution network circuit breaker test tooling device according to claim 1, characterized in that: The closing and opening holding circuit (72) is divided into a closing holding circuit and an opening protection circuit, and includes six normally open contacts (721) and two normally closed contacts (722). The closing holding circuit includes a first normally open contact, a third normally open contact, a fifth normally open contact, a normally closed contact and a closing holding relay (723). The opening protection circuit includes a second normally open contact, a fourth normally open contact, a sixth normally open contact, a fifth normally closed contact and an opening holding relay (724). The three normally open contacts (721) in the holding circuit are connected in parallel, the normally open contact (721) and the normally closed contact (722) are connected in series, and the fifth normally closed contact and the sixth normally closed contact are in an electrical interlocking relationship.

5. A portable distribution network circuit breaker test tooling device according to claim 1, characterized in that: The closing / opening position signal circuit (73) comprises: a control box power supply terminal (731), an opening contact (732), a closing contact (733) and a control box common terminal (734); the opening contact (732) and the closing contact (733) are connected in parallel.

6. A portable distribution network circuit breaker test tooling device according to claim 1, characterized in that: A cable storage compartment (16) for storing cables is arranged near the right side of the box body (1), and the cable storage compartment (16) is provided with an opening on the right side of the box body (1). The power interface (4) is an AC220V aviation plug.

7. A portable distribution network circuit breaker test tooling device according to claim 2, characterized in that: The power converter (6) is connected to a voltage selection knob (9), the power switch (8) is arranged in series on an input line of the power converter (6), and the voltage selection knob (9) is a 3-speed 2-stage LW26 series switch.

8. A portable distribution network circuit breaker test tooling device according to claim 5, characterized in that: The open position contact (732) and the closed position contact (733) are arranged in parallel. When the open position contact (732) is closed, the open position light (11) on the control panel lights up, indicating the open position. When the closed position contact (733) is closed, the closed position light (10) on the control panel lights up, indicating the closed position.

9. A portable distribution network circuit breaker test tooling device according to claim 1, characterized in that: The outer side of the handle (5) is provided with an anti-slip cover, and the surface of the anti-slip cover is provided with a plurality of anti-slip grooves. Two diodes are connected in series on the output circuit of the power module (17).

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