A switch drawer test circuit and a test device

Abstract

A switch drawer test circuit, which includes a voltage transformation component, a voltage output component, a closing and opening simulation unit, and a test component; the voltage transformation component is used to access alternating current to output multiple paths of direct current voltages for switch drawer testing; the voltage output component is connected to the voltage transformation component and is used to indicate, display, and supply multiple paths of direct current voltages; the test component is connected to the voltage transformation component and is used to connect the switch drawer to be tested and indicate the fault state of the switch drawer to be tested; and the closing and opening simulation unit is connected to the voltage transformation component and the test component and is used to simulate the closing operation instruction and opening operation instruction of the switch drawer to be tested for off-line testing. It simplifies the cumbersome test process of the switch drawer, saves the manpower and material resources required for testing, and improves the test efficiency.

Description

Technical Field

[0001] The present invention belongs to the field of computer technology, and particularly relates to a switch drawer test circuit and a test device. Background Art

[0002] During the nuclear power plant maintenance process, the maintenance workload of the switchboard is very large, and each switchboard contains multiple switch drawers, all of which need to be tested to determine whether there are any faults.

[0003] Currently, the traditional switch drawer tests are divided into the following two situations:

[0004] In the first situation, during routine maintenance, a functional test needs to be carried out on a certain switch drawer after maintenance to check whether the maintenance is in place. Under this working condition, the entire switchboard is in a normal operating state, and each switch drawer is related to the normal operation of the downstream load. Any operation on the switch drawers in the switchboard may affect other downstream loads. If there is a small mistake during the test of the switch drawer, it is more likely to cause a short circuit or grounding of the DC power supply, which will have an adverse impact or even pose a threat to the entire DC system, and will also cause more switchboards to be threatened. This series of chain reactions will seriously affect the operation of the nuclear power plant and even endanger nuclear safety.

[0005] During routine maintenance, in order to avoid the impact of testing one switch drawer on the entire system, when testing a switch drawer, the switch drawer to be tested is first disconnected from the switchboard, and a single-phase relay protection tester is used alone to supply the required DC control power for the switch drawer. If it is a contactor-type switch drawer, another single-phase relay protection tester is also required to provide another DC power supply. The single-phase relay protection tester here is originally a device for relay protection and is not a device specifically for testing switch drawers. Here, only this device is used to provide DC power to the switch drawer to be tested. After having the power supply, when testing the switch drawer, the first person needs to monitor the operation of the power supply, the second person issues operation step instructions according to the work document, and the third person uses a multimeter to test the corresponding states of each corresponding port of the switch drawer. This kind of switch drawer test requires a large amount of resources. One single-phase relay tester needs to be carried to the site by two people, and generally two of them need to be transported to the site by a trolley. Then, according to the existing drawings, the power supply output by the single-phase relay protection tester and the switch drawer to be tested are connected with test cables. The minimum number of pins that the switch drawer to be tested needs to be connected is twenty, and the definition of each pin is different. If there is a wiring error in any one of the entire process, it may cause the switch drawer to be unavailable, thus affecting the function of the downstream equipment in the system and also affecting the maintenance schedule.

[0006] In the second case, during the major overhaul of the shutdown unit, it is necessary to test all the switch drawers of the entire distribution panel. In this case, the entire distribution panel is stopped. First, the switch drawer to be tested is disconnected from the distribution panel, and then it is tested one by one according to the daily maintenance method. The most prominent problem in testing the switch drawers during the major overhaul is the large workload, tight construction period, and heavy tasks. A small mistake will affect the overhaul quality of the entire distribution panel, and even affect the major overhaul period and the unit status.

[0007] Therefore, in the traditional technical solution, there are problems of excessive resource occupation and low test efficiency in the test of switch drawers during nuclear power plant maintenance. Summary of the Invention

[0008] The purpose of the present invention is to provide a switch drawer test circuit and a test device, aiming to solve the problems of excessive resource occupation and low test efficiency in the test of switch drawers during nuclear power plant maintenance in the traditional technical solution.

[0009] In the first aspect, an embodiment of the present disclosure provides a switch drawer test circuit, which includes a voltage transformation component, a voltage output component, a closing and opening simulation unit, and a test component; the voltage transformation component is used to access alternating current to output multiple paths of direct current voltage for switch drawer testing; the voltage output component is connected to the voltage transformation component and is used to indicate, display, and supply multiple paths of direct current voltage; the test component is connected to the voltage transformation component and is used to connect the switch drawer to be tested and indicate the state of the switch drawer to be tested; and the closing and opening simulation unit is connected to the voltage transformation component and the test component and is used to simulate the closing operation instruction and the opening operation instruction of the switch drawer to be tested to perform an offline test on the switch drawer to be tested. A dedicated test circuit for switch drawers is provided, which simplifies the cumbersome test process of switch drawers, saves the human and material resources required for testing, and improves the test efficiency.

[0010] Combined with the first aspect, in the first implementation manner of the first aspect, the voltage transformation component includes a fuse, a power switch, a power conversion module, a first resistor for current limiting, and a power indicator light; the live wire of the alternating current is connected to the first end of the fuse; the second end of the fuse is connected to the first input end of the power switch; the neutral wire of the alternating current is connected to the second input end of the power switch; the output end of the power switch is connected to the input end of the power conversion module; the output end of the power conversion module includes a first direct current loop output end, a second direct current loop output end, a third direct current loop output end, and a fourth direct current loop output end; the positive pole of the fourth direct current loop output end is connected to the first end of the first resistor; the second end of the first resistor is connected to the positive pole of the power indicator light; the negative pole of the power indicator light is connected to the negative pole of the fourth direct current loop output end. Four kinds of direct current power supplies required for switch drawer testing are provided.

[0011] Combined with the first implementation manner of the first aspect, in the second implementation manner of the first aspect, the voltage output component includes an output switch, a relay, a reverse absorption diode, a first voltmeter, a second voltmeter, a third voltmeter, a first DC socket, a second DC socket, a third DC socket, a first DC indication circuit, a second DC indication circuit, and a third DC indication circuit; the positive pole of the output end of the second DC circuit is connected to the first end of the output switch; the second end of the output switch is connected to the negative pole of the reverse absorption diode and the first end of the relay; the negative pole of the output end of the second DC circuit is connected to the positive pole of the reverse absorption diode and the second end of the relay; the output end of the first DC circuit is connected to the first DC socket through the first set of normally open contacts of the relay; the first DC socket is connected to the input end of the first DC indication circuit; the first voltmeter is connected in parallel between the two poles of the first DC socket; the output end of the second DC circuit is connected to the second DC socket through the second set of normally open contacts of the relay; the second DC socket is connected to the input end of the second DC indication circuit; the first voltmeter is connected in parallel between the two poles of the second DC socket; the output end of the third DC circuit is connected to the third DC socket through the third set of normally open contacts of the relay; the third DC socket is connected to the input end of the third DC indication circuit; the first voltmeter is connected in parallel between the two poles of the third DC socket. Monitor three of the DC voltages used for testing the switch drawer, indicate whether they are normal, and display the relevant voltage values. At the same time, these three DC voltages can be used by external electrical equipment.

[0012] Combined with the first implementation manner of the first aspect, in the third implementation manner of the first aspect, the closing and opening simulation unit includes a closing button, a closing indication circuit, an opening indication circuit, and an opening button with two sets of interlocking normally open contacts; the positive pole of the output end of the second DC circuit is connected to the first end of the closing button and the first end of the first set of normally open contacts of the opening button; the second end of the closing button is connected to the input end of the closing indication circuit; the second end of the first set of normally open contacts of the opening button is connected to the input end of the opening indication circuit; the negative pole of the output end of the second DC circuit is connected to the output end of the closing indication circuit and the output end of the opening indication circuit. It can simulate the normal opening and closing operations of the switch drawer without disconnecting the switch drawer, and testing operations can also be carried out during its operation without affecting the normal operation of other parts.

[0013] Combined with the third implementation manner of the first aspect, in the fourth implementation manner of the first aspect, the test component includes a first diode, a second diode, a third diode, a fourth diode, a closing state indication circuit, a tripping state indication circuit, a fault state indication circuit, an unavailable state indication circuit, a standby state indication circuit, a test female plug, and a connection male plug that matches the test female plug; the positive pole of the fourth DC circuit output terminal is connected to the positive poles of the first diode, the second diode, the third diode, and the fourth diode; the negative pole of the fourth DC circuit output terminal is connected to the output terminals of the closing state indication circuit, the tripping state indication circuit, the fault state indication circuit, the unavailable state indication circuit, and the standby state indication circuit; the pin side of the test female plug is connected to the voltage transformation component, the closing and tripping simulation unit, and the test component; the slot side of the test female plug is connected to the plug side of the connection male plug; the pin side of the connection male plug is used to connect different functional types of switch drawers to be tested. The wiring connection between this circuit and the switch drawer to be tested is realized through plug-ins, eliminating the cumbersome link of wiring according to the drawing, and the plugging is more efficient and accurate; the indication circuit directly indicates whether there is a fault in the switch drawer to be tested and in which aspect there is a fault, which is very intuitive.

[0014] Combined with the fourth implementation manner of the first aspect, in the fifth implementation manner of the first aspect, when the switch drawer to be tested is a circuit breaker type switch drawer, the first connection method is adopted between the pin side of the connection male plug and the switch drawer to be tested. Different connection methods are adopted between the pin side of the connection male plug and the switch drawer to be tested, which can meet different functional types of switch drawers to be tested.

[0015] Combined with the fourth implementation manner of the first aspect, in the sixth implementation manner of the first aspect, when the switch drawer to be tested is a contactor type switch drawer, the second connection method is adopted between the pin side of the connection male plug and the switch drawer to be tested. Different connection methods are adopted between the pin side of the connection male plug and the switch drawer to be tested, which can meet different functional types of switch drawers to be tested.

[0016] Combined with the fourth implementation manner of the first aspect, in the seventh implementation manner of the first aspect, when the switch drawer to be tested is a reversible contactor type switch drawer, the third connection method is adopted between the pin side of the connection male plug and the switch drawer to be tested. Different connection methods are adopted between the pin side of the connection male plug and the switch drawer to be tested, which can meet different functional types of switch drawers to be tested.

[0017] In the second aspect, the embodiments of the present disclosure provide a switch drawer test device, including a box body and an AC power input socket arranged on the box body, and the switch drawer test device includes the switch drawer test circuit according to any one of the first aspect or the first to seventh implementation manners of the first aspect. The test device is convenient to carry and use more conveniently.

[0018] Combined with the second aspect, in the first implementation manner of the second aspect, one side of the box body is set as an operation panel; a status indicator light, operation buttons, and various interfaces are arranged on the operation panel. It provides more convenient conditions for the single-person operation and testing of the switch drawer. The centralized placement of these components facilitates observation and operation.

[0019] The above-mentioned switch drawer test circuit and test equipment provide working power for the voltage output component, switching-on and -off simulation unit, and test component through the voltage transformation component. Through the voltage output component, the working state of the test power supply can be monitored in real time to see if it meets the requirements, and various DC power supplies can also be provided for external devices. Through the switching-on and -off simulation unit, the real switching-on and -off operations of the switch drawer can be simulated to achieve off-line testing. Through the test component, precise and rapid connection with the switch drawer to be tested can be achieved, so that the single-person completion of the switch drawer test work can be realized, and the problems of cumbersome wiring and easy error during each test are avoided, saving human and material resources and improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 Structural schematic diagram of the switch drawer test circuit provided by an embodiment of the present disclosure;

[0022] Figure 2 For Figure 1 Example circuit schematic diagram of the voltage transformation component, voltage output component, and switching-on and -off simulation unit in the switch drawer test circuit shown;

[0023] Figure 3 For Figure 1 Example circuit schematic diagram of the voltage transformation component and test component in the switch drawer test circuit shown;

[0024] Figure 4 For Figure 3 Structural schematic diagram of the test female plug in the test component of the switch drawer test circuit shown;

[0025] Figure 5 For Figure 3 One of the structural schematic diagrams of the connecting male plug in the test component of the switch drawer test circuit shown;

[0026] Figure 6 For Figure 3One of the schematic structural diagrams of the connection of the male plug in the test component of the switch drawer test circuit shown;

[0027] Figure 7 is Figure 3 One of the schematic structural diagrams of the connection of the male plug in the test component of the switch drawer test circuit shown;

[0028] Figure 8 The schematic structural diagram of the switch drawer test device provided by an embodiment of the present disclosure. Specific embodiments

[0029] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to 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.

[0030] Figure 1 The schematic structural diagram of the switch drawer test circuit provided by an embodiment of the present invention is shown. For the convenience of description, only the parts related to this embodiment are shown and are described in detail as follows:

[0031] A switch drawer test circuit includes a voltage transformation component 100, a voltage output component 200, a closing and opening simulation unit 300, and a test component 400; the voltage transformation component 100 is used to access alternating current to output multiple direct current voltages for testing the switch F0 drawer; the voltage output component 200 is connected to the voltage transformation component 100 and is used to indicate, display and supply multiple direct current voltages; the test component 400 is connected to the voltage transformation component 100 and is used to connect the switch drawer to be tested and indicate the state of the switch drawer to be tested; and the closing and opening simulation unit 300 is connected to the voltage transformation component 100 and the test component 400 and is used to simulate the closing operation instruction and the opening operation instruction of the switch drawer to be tested to perform an offline test on the switch drawer to be tested.

[0032] Specifically, the voltage conversion component 100 converts the input AC 220V power supply into four different DC voltage sources to provide working power supplies for the voltage output component 200, the opening and closing simulation unit 300, and the test component 400; the voltage output component 200 provides working indicators and voltage value monitoring for three of the DC voltage sources, enabling real-time observation of whether the output of the working power supply is normal during the switch drawer test work and facilitating the use of these three DC voltage sources by external devices; the opening and closing simulation unit 300 can simulate the opening and closing operation instructions of the switch drawer, avoiding interference with the normal operation of the switch drawer during the test work and providing sufficient conditions for the offline test of the switch drawer; the test component 400 is connected to the switch drawer to be tested and conducts relevant test work on the switch drawer through the opening and closing simulation unit 300. The test component 400 can real-time indicate the fault status of the switch drawer to be tested, which is convenient and intuitive; these parts together constitute the switch drawer test circuit, simplifying the test process, saving the human and material resources required for the test, enabling a single person to complete the test work, and greatly improving the test efficiency.

[0033] As Figure 2 and Figure 3 shown, in one embodiment, the voltage conversion component 100 includes a fuse FU, a power switch F, a power conversion module D, a first resistor R1 for current limiting, and a power indicator D1; the live wire of the alternating current is connected to the first end of the fuse FU; the second end of the fuse FU is connected to the first input terminal of the power switch F; the neutral wire of the alternating current is connected to the second input terminal of the power switch F; the output terminal of the power switch F is connected to the input terminal of the power conversion module D; the output terminal of the power conversion module D includes a first DC loop output terminal, a second DC loop output terminal, a third DC loop output terminal, and a fourth DC loop output terminal; the positive pole of the fourth DC loop output terminal is connected to the first end of the first resistor R1; the second end of the first resistor R1 is connected to the positive pole of the power indicator D1; the negative pole of the power indicator D1 is connected to the negative pole of the fourth DC loop output terminal. Four DC power supplies required for the switch drawer test are provided.

[0034] Specifically, the function of the power conversion module D is to convert 220V alternating current into four DC outputs. Among them, the first DC loop outputs a DC 110V voltage source, the second DC loop outputs a DC 48V voltage source, the third DC loop outputs a DC 24V voltage source, and the first DC loop outputs a DC 5V voltage source. The power conversion module D can be a high-frequency switching power supply module or a power supply composed of a power frequency transformer, a rectifier bridge, and filter capacitors.

[0035] As Figure 2As shown, in one embodiment, the voltage output component 200 includes an output switch F0, a relay K, a reverse absorption diode D16, a first voltmeter V1, a second voltmeter V2, a third voltmeter V3, a first DC socket E1, a second DC socket E2, a third DC socket E3, a first DC indication circuit, a second DC indication circuit, and a third DC indication circuit; the positive pole of the output end of the second DC circuit is connected to the first end of the output switch F0; the second end of the output switch F0 is connected to the negative pole of the reverse absorption diode D16 and the first end of the relay K; the negative pole of the output end of the second DC circuit is connected to the positive pole of the reverse absorption diode D16 and the second end of the relay K; the output end of the first DC circuit is connected to the first DC socket E1 through the first set of normally open contacts of the relay K; the first DC socket E1 is connected to the input end of the first DC indication circuit; the first voltmeter V1 is connected in parallel between the two poles of the first DC socket E1; the output end of the second DC circuit is connected to the second DC socket E2 through the second set of normally open contacts of the relay K; the second DC socket E2 is connected to the input end of the second DC indication circuit; the first voltmeter V1 is connected in parallel between the two poles of the second DC socket E2; the output end of the third DC circuit is connected to the third DC socket E3 through the third set of normally open contacts of the relay K; the third DC socket E3 is connected to the input end of the third DC indication circuit; the first voltmeter V1 is connected in parallel between the two poles of the third DC socket E3. Monitor three of the DC voltages used for testing the switch drawer, indicate whether they are normal, and display the relevant voltage values. At the same time, these three DC voltages can be used by external electrical equipment.

[0036] Specifically, the output switch F0 is a self-locking switch, which controls the energization of the relay K coil, thereby controlling the working state of the voltage output component 200 through the normally open contacts of the relay K; among them, the first DC socket E1, the second DC socket E2, and the third DC socket E3 are used to provide external DC output interfaces for convenient external connection and use.

[0037] As Figure 2 shown, in one embodiment, the first DC indication circuit includes a ninth resistor R9 and a ninth light-emitting diode D9; the positive pole of the first DC socket E1 is connected to the first end of the ninth resistor R9; the second end of the ninth resistor R9 is connected to the positive pole of the ninth light-emitting diode D9; the negative pole of the ninth light-emitting diode D9 is connected to the negative pole of the first DC socket E1.

[0038] As Figure 2 shown, in one embodiment, the second DC indication circuit includes a tenth resistor R10 and a tenth light-emitting diode D10; the positive pole of the second DC socket E2 is connected to the first end of the tenth resistor R10; the second end of the tenth resistor R10 is connected to the positive pole of the tenth light-emitting diode D10; the negative pole of the tenth light-emitting diode D10 is connected to the negative pole of the second DC socket E2.

[0039] As Figure 2 shown, in one embodiment, the third DC indication circuit includes an eleventh resistor R11 and an eleventh light-emitting diode D11; the positive electrode of the third DC socket E3 is connected to the first end of the eleventh resistor R11; the second end of the eleventh resistor R11 is connected to the positive electrode of the eleventh light-emitting diode D11; the negative electrode of the eleventh light-emitting diode D11 is connected to the negative electrode of the third DC socket E3.

[0040] As Figure 2 shown, in one embodiment, the closing and opening simulation unit 300 includes a closing button F1, a closing indication circuit, an opening indication circuit, and an opening button F2 provided with two groups of interlocking normally open contacts; the positive electrode of the second DC circuit output terminal is connected to the first end of the closing button F1 and the first end of the first group of normally open contacts of the opening button F2; the second end of the closing button F1 is connected to the input terminal of the closing indication circuit; the second end of the first group of normally open contacts of the opening button F2 is connected to the input terminal of the opening indication circuit; the negative electrode of the second DC circuit output terminal is connected to the output terminals of the closing indication circuit and the opening indication circuit. It can simulate the normal opening and closing operations of the switch drawer without having to disconnect the switch drawer, and test operations can also be carried out during its operation without affecting the normal operation of other parts.

[0041] As Figure 2 shown, in one embodiment, the closing indication circuit includes a second resistor R2 and a second light-emitting diode D2; the second end of the closing button F1 is connected to the first end of the second resistor R2; the second end of the second resistor R2 is connected to the positive electrode of the second light-emitting diode D2; the negative electrode of the second light-emitting diode D2 is connected to the negative electrode of the second DC circuit output terminal; the second light-emitting diode D2 serves as a simulated closing indicator light.

[0042] As Figure 2 shown, in one embodiment, the opening indication circuit includes a third resistor R3 and a third light-emitting diode D3; the first end of the first group of normally open contacts of the opening button F2 is connected to the first end of the third resistor R3; the second end of the third resistor R3 is connected to the positive electrode of the third light-emitting diode D3; the negative electrode of the third light-emitting diode D3 is connected to the negative electrode of the second DC circuit output terminal; the third light-emitting diode D3 serves as a simulated opening indicator light.

[0043] As Figure 3As shown, in one embodiment, the test component 400 includes a first diode D12, a second diode D13, a third diode D14, a fourth diode D15, a closing state indication circuit, a tripping state indication circuit, a fault state indication circuit, an unavailable state indication circuit, a standby state indication circuit, a test female socket A1, and a connection male plug A2 that matches the test female socket A1; the positive pole of the fourth DC circuit output terminal is connected to the positive poles of the first diode D12, the second diode D13, the third diode D14, and the fourth diode D15; the negative pole of the fourth DC circuit output terminal is connected to the output terminals of the closing state indication circuit, the tripping state indication circuit, the fault state indication circuit, the unavailable state indication circuit, and the standby state indication circuit; the pin side of the test female socket A1 is connected to the voltage transformation component 100, the closing and tripping simulation unit 300, and the test component 400; the slot side of the test female socket A1 is connected to the plug side of the connection male plug A2; the pin side of the connection male plug A2 is used to connect the switch drawers to be tested of different functional types.

[0044] As Figure 3 shown, in one embodiment, the closing state indication circuit includes a fourth resistor R4 and a fourth light-emitting diode D4; the fifth pin of the test female socket A1 is connected to the second end of the fourth resistor R4; the first end of the fourth resistor R4 is connected to the positive pole of the fourth light-emitting diode D4; the negative pole of the fourth light-emitting diode D4 is connected to the negative pole of the fourth DC circuit output terminal; the fourth light-emitting diode D4 serves as the closing state indicator light.

[0045] As Figure 3 shown, in one embodiment, the tripping state indication circuit includes a fifth resistor R5 and a fifth light-emitting diode D5; the sixth pin of the test female socket A1 is connected to the second end of the fifth resistor R5; the first end of the fifth resistor R5 is connected to the positive pole of the fifth light-emitting diode D5; the negative pole of the fifth light-emitting diode D5 is connected to the negative pole of the fourth DC circuit output terminal; the fifth light-emitting diode D5 serves as the tripping state indicator light.

[0046] As Figure 3 shown, in one embodiment, the fault state indication circuit includes a sixth resistor R6 and a sixth light-emitting diode D6; the seventh pin of the test female socket A1 is connected to the second end of the sixth resistor R6; the first end of the sixth resistor R6 is connected to the positive pole of the sixth light-emitting diode D6; the negative pole of the sixth light-emitting diode D6 is connected to the negative pole of the fourth DC circuit output terminal; the sixth light-emitting diode D6 serves as the fault state indicator light.

[0047] As Figure 3As shown, in one embodiment, the unavailable state indication circuit includes a seventh resistor R7 and a seventh light-emitting diode D7; the fourteenth pin of the test female plug A1 is connected to the second end of the seventh resistor R7; the first end of the seventh resistor R7 is connected to the positive electrode of the seventh light-emitting diode D7; the negative electrode of the seventh light-emitting diode D7 is connected to the negative electrode of the fourth DC circuit output terminal; the seventh light-emitting diode D7 serves as the unavailable state indicator light.

[0048] As Figure 3 shown, in one embodiment, the standby state indication circuit includes an eighth resistor R8 and an eighth light-emitting diode D8; the sixteenth pin of the test female plug A1 is connected to the second end of the eighth resistor R8; the first end of the eighth resistor R8 is connected to the positive electrode of the eighth light-emitting diode D8; the negative electrode of the eighth light-emitting diode D8 is connected to the negative electrode of the fourth DC circuit output terminal; the eighth light-emitting diode D8 serves as the standby state indicator light.

[0049] As Figure 4 shown, in one embodiment, the first pin of the test female plug A1 is connected to the negative electrode of the second DC circuit output terminal; the second pin of the test female plug A1 is connected to the second end of the closing button F1; the third pin of the test female plug A1 is connected to the second end of the first set of normally open contacts of the opening button F2; the fourth pin of the test female plug A1 is connected to the negative electrode of the first diode D12; the fifth pin of the test female plug A1 is connected to the input terminal of the closing state indication circuit; the sixth pin of the test female plug A1 is connected to the input terminal of the opening state indication circuit; the seventh pin of the test female plug A1 is connected to the input terminal of the fault state indication circuit; the eighth pin of the test female plug A1 is connected to the negative electrode of the second diode D13; the ninth pin of the test female plug A1 is connected to the first end of the second set of normally open contacts of the opening button F2; the tenth pin of the test female plug A1 is connected to the second end of the second set of normally open contacts of the opening button F2; the thirteenth pin of the test female plug A1 is connected to the negative electrode of the third diode D14; the fourteenth pin of the test female plug A1 is connected to the input terminal of the unavailable state indication circuit; the fifteenth pin of the test female plug A1 is connected to the negative electrode of the fourth diode D15; the sixteenth pin of the test female plug A1 is connected to the input terminal of the standby state indication circuit; the seventeenth pin of the test female plug A1 is connected to the positive electrode of the second DC circuit output terminal; the eighteenth pin of the test female plug A1 is connected to the negative electrode of the second DC circuit output terminal; the twenty-fourth pin of the test female plug A1 is connected to the positive electrode of the first DC circuit output terminal; the twenty-sixth pin of the test female plug A1 is connected to the negative electrode of the first DC circuit output terminal.

[0050] It should be noted that the circuit breaker type switch drawer referred to in this disclosure is a switch drawer that can perform tripping remotely, requires on-site execution for closing, and sends the switch status to the remote port; the contactor type switch drawer is a switch drawer that can perform opening and closing remotely and sends the switch status to the remote port; the reversible contactor type switch drawer is a switch drawer that can perform opening and closing remotely, sends the switch status to the remote port, and the power output can be phase-changed.

[0051] As Figure 5 shown, in one of the embodiments, when the switch drawer to be tested is a circuit breaker type switch drawer, the pin side of the male plug A2 is connected to the switch drawer to be tested by a first connection method. Different connection methods between the pin side of the male plug A2 and the switch drawer to be tested can meet different functional types of switch drawers to be tested.

[0052] Specifically, the first connection method is as follows: the fourth pin of the male plug A2 is used to connect the external indication common end of the switch drawer to be tested; the fifth pin of the male plug A2 is used to connect the external indication closing end of the switch drawer to be tested; the sixth pin of the male plug A2 is used to connect the external indication tripping end of the switch drawer to be tested; the seventh pin of the male plug A2 is used to connect the first end of the fault signal of the switch drawer to be tested; the eighth pin of the male plug A2 is used to connect the second end of the fault signal of the switch drawer to be tested; the ninth pin of the male plug A2 is used to connect the first end of the external command tripping of the switch drawer to be tested; the tenth pin of the male plug A2 is used to connect the second end of the external command tripping of the switch drawer to be tested; the seventeenth pin of the male plug A2 is used to connect the positive terminal of DC48V of the switch drawer to be tested; the eighteenth pin of the male plug A2 is used to connect the negative terminal of DC48V of the switch drawer to be tested; the positive terminal of DC110V of the switch drawer to be tested is connected to the twenty-fourth pin of the male plug A2; the negative terminal of DC110V of the switch drawer to be tested is connected to the twenty-sixth pin of the male plug A2; the first end of the leakage CT port of the switch drawer to be tested is connected to the second end of the leakage CT port of the switch drawer to be tested through a short-circuit resistor to avoid the action of the leakage detection protection of the switch drawer.

[0053] As Figure 6 shown, in one of the embodiments, when the switch drawer to be tested is a contactor type switch drawer, the pin side of the male plug A2 is connected to the switch drawer to be tested by a second connection method. Different connection methods between the pin side of the male plug A2 and the switch drawer to be tested can meet different functional types of switch drawers to be tested.

[0054] Specifically, the second connection method is as follows: The first pin of the male plug A2 is used to connect the DCS command common terminal of the switch drawer to be tested; the second pin of the male plug A2 is used to connect the DCS operation command terminal of the switch drawer to be tested; the third pin of the male plug A2 is used to connect the DCS stop command terminal of the switch drawer to be tested; the fourth pin of the male plug A2 is used to connect the DCS command common terminal of the switch drawer to be tested; the fifth pin of the male plug A2 is used to connect the DCS operation command terminal of the switch drawer to be tested; the sixth pin of the male plug A2 is used to connect the DCS stop command terminal of the switch drawer to be tested; the seventh pin of the male plug A2 is used to connect the first end of the fault signal of the switch drawer to be tested; the eighth pin of the male plug A2 is used to connect the second end of the fault signal of the switch drawer to be tested; the twenty-fourth pin of the male plug A2 is used to connect the DC110V positive terminal of the switch drawer to be tested; the twenty-sixth pin of the male plug A2 is used to connect the DC110V negative terminal of the switch drawer to be tested; the thirteenth pin of the male plug A2 is used to connect the unavailable common terminal of the switch drawer to be tested; the fourteenth pin of the male plug A2 is used to connect the unavailable signal terminal of the switch drawer to be tested; the fifteenth pin of the male plug A2 is used to connect the first end of the contactor status signal of the switch drawer to be tested; the sixteenth pin of the male plug A2 is used to connect the second end of the contactor status signal of the switch drawer to be tested; the seventeenth pin of the male plug A2 is used to connect the DC48V positive terminal of the switch drawer to be tested; the eighteenth pin of the male plug A2 is used to connect the DC48V negative terminal of the switch drawer to be tested; the first end of the leakage CT port of the switch drawer to be tested is connected to the second end of the leakage CT port of the switch drawer to be tested through a shorting resistor.

[0055] As Figure 7 shown, in one embodiment, when the switch drawer to be tested is a reversible contactor type switch drawer, the third connection method is adopted between the pin side of the male plug A2 and the switch drawer to be tested. Different connection methods between the pin side of the male plug A2 and the switch drawer to be tested can meet different functional types of switch drawers to be tested.

[0056] Specifically, the third connection method is as follows: The first pin of the male plug A2 is used to connect the DCS command common end of the switch drawer to be tested; the second pin of the male plug A2 is used to connect the DCS command valve opening end of the switch drawer to be tested; the third pin of the male plug A2 is used to connect the DCS command valve closing end of the switch drawer to be tested; the seventh pin of the male plug A2 is used to connect the first end of the fault signal of the switch drawer to be tested; the eighth pin of the male plug A2 is used to connect the second end of the fault signal of the switch drawer to be tested; the twenty-fourth pin of the male plug A2 is used to connect the DC110V positive end of the switch drawer to be tested; the twenty-sixth pin of the male plug A2 is used to connect the DC110V negative end of the switch drawer to be tested; the thirteenth pin of the male plug A2 is used to connect the unavailable end of the switch drawer to be tested; the fourteenth pin of the male plug A2 is used to connect the unavailable end of the switch drawer to be tested; the seventeenth pin of the male plug A2 is used to connect the DC48V positive end of the switch drawer to be tested; the eighteenth pin of the male plug A2 is used to connect the DC48V negative end of the switch drawer to be tested; the fourth pin of the male plug A2 is used to connect the common end of the switch drawer to be tested; the fifth pin of the male plug A2 is used to connect the valve opening indication end of the switch drawer to be tested; the sixth pin of the male plug A2 is used to connect the valve closing indication end of the switch drawer to be tested.

[0057] As Figure 8 shown, in one embodiment, the switch drawer testing device includes a box body C and an AC power input socket B provided on the box body C, and also includes any one of the switch drawer testing circuits provided by the embodiments of the present disclosure.

[0058] Specifically, the box body C is used to carry the switch drawer testing circuit, and the components in the switch drawer testing circuit are installed inside or on the surface of the box body C. The AC power input interface is used to conveniently access 220V alternating current as the input power of the voltage transformation component 100.

[0059] As Figure 8 shown, in one embodiment, one side of the box body C is set as an operation panel; status indicator lights, operation buttons and various interfaces are provided on the operation panel. It provides more convenient conditions for a single person to operate the test work of the switch drawer. The centralized placement of these components is convenient for observation and operation.

[0060] This switch drawer offline test equipment is compact and easy to carry and move during operation. The user only needs to operate the machine simulation switch to see the various states of the tested switch drawer from the indicator light on the panel. The present invention designs a variety of connection male plugs A2 with corresponding functional interfaces for a variety of switch drawers. Different types of connection male plugs A2 can be used to connect to different types of switch drawers through this test equipment to test different switch drawers. This machine is an offline test of the switch drawer. The entire test process achieves zero contact with the system, avoiding potential impact on the system.

[0061] In one embodiment, according to the functional type of each switch drawer to be tested, the corresponding connection mode is selected between the connecting male plug A2 and each switch drawer to be tested. Once connected, the connecting male plug A2 is fixed to each switch drawer to be tested, and only one wiring is required. After that, the plugging and unplugging of the switch drawer can be realized by plugging and unplugging the connecting male plug A2 and the test female plug A1. This operation mode avoids the wiring and disconnection between the connecting male plug A2 and each switch drawer to be tested during testing, which can significantly improve the test efficiency and reduce the occurrence of wiring errors.

[0062] In one embodiment, the specific method of using the present disclosure is as follows:

[0063] First, connect the present invention to a 220V power supply through the AC power input socket B. The power reaches the power switch F through the fuse FU. When the power switch F is closed, the AC power enters the power conversion module D. At this time, the power conversion module D outputs 5V, 24V, 48V and 110V DC voltages. The 5V positive polarity voltage is limited by the first resistor R1 and forms a loop through the power indicator D1. The power indicator D1 is lit and the whole machine enters a ready state.

[0064] There are two functions available for this machine:

[0065] The first function is to output DC voltage to the outside:

[0066] Press the output switch F0, the 48V positive polarity voltage flows to the coil of relay K through the output switch F0, and then returns to the negative pole of 48V. The coil of relay K is electrically excited, and all its normally open contacts in the circuit are connected.

[0067] In the first path, 110V DC is output to the first DC socket E1, through which the external 110V DC power supply can be used; at the same time, the 110V positive polarity voltage flows through the ninth light-emitting diode D9 via the ninth resistor R9, and the 110V DC output indicator light is lit.

[0068] The second path: The DC 48V is output to the second DC socket E2, and the external can use the 48V DC power supply through this socket. At the same time, the 48V positive voltage flows through the tenth light-emitting diode D10 via the tenth resistor R10, and the DC 48V output indicator light is lit.

[0069] The third path: The DC 24V is output to the third DC socket E3, and the external can use the 24V DC power supply through this socket. At the same time, the 24V positive voltage flows through the eleventh light-emitting diode D11 after being limited by the eleventh resistor R11, and the 24V output indicator light D11 is lit.

[0070] The second function: Perform an offline test on the switch drawer:

[0071] I. Circuit breaker type switch drawer test: Select the connection male plug A2 of the first connection method. Since this type of connection method is for offline use and the CT circuit cannot be connected to the circuit, resulting in the switch leakage detection protection action, the CT connection port needs to be short-circuited with a resistor RX. Connect the pin side of the selected corresponding connection male plug A2 to the corresponding port of the circuit breaker type switch drawer, and connect the plug side of the connection male plug A2 to the slot side of the test female plug A1.

[0072] After the entire test circuit is connected:

[0073] 1.1. Close the switch: Close the circuit breaker type switch drawer. According to the working conditions of this type of switch drawer, at this time, the external indication of closing has been sent out from the external indication common terminal and the external indication closing terminal of this switch drawer. At this time, these two ports should be in a conducting state. According to Figure 3 It can be obtained that the 5V positive power supply passes through the first diode D12, via the external indication common terminal, the external indication closing terminal, and the fourth resistor R4, and then through the fourth light-emitting diode D4 back to the 5V negative terminal. At this time, the fourth light-emitting diode D4 is lit, indicating that the closing function of the measured switch drawer is normal.

[0074] 1.2. Open the switch: Simulate an external command to open the switch. Press the open button F2, and the ninth and tenth pins of the test female plug A1 are short-circuited. Through the connection male plug A2, its corresponding ninth and tenth pins are also short-circuited, thus realizing the opening operation of the circuit breaker type switch drawer. According to the working conditions requirements of this type of switch drawer, the external indication of opening has been sent out from the external indication common terminal and the external indication opening terminal of this switch drawer. At this time, the fourth and sixth pins of the test female plug A1 and the connection male plug A2 are in a conducting state. According to Figure 3 It can be obtained that the 5V positive power supply passes through the first diode D12, via the fourth and sixth pins of the test female plug A1 and the connection male plug A2 and the fifth resistor R5, and then through the fifth light-emitting diode D5 back to the 5V negative terminal. At this time, the opening indicator light, that is, the fifth light-emitting diode D5, is lit, indicating that the opening function of the measured switch drawer is normal.

[0075] 1.3. Fault, close the circuit breaker type switch drawer, manually press the test button to trip the circuit breaker type switch drawer to simulate a fault. According to the requirements of this type of switch under this condition, when the external indication common terminal and the external indication tripping terminal of the switch drawer issue a tripping command, the two fault signal terminals of the switch drawer will also issue fault signals simultaneously. At this time, there should be a conductive state between the test female plug A1 and the seventh and eighth pins connecting the male plug A2. According to Figure 3 It can be concluded that the 5V positive power supply passes through the second diode D13, through the test female plug A1, the seventh and eighth pins connecting the male plug A2, and the sixth resistor R6, and returns to the 5V negative through the sixth light-emitting diode D6. When the fifth light-emitting diode D5 is lit and the sixth light-emitting diode D6 is also lit, it indicates that the fault indication of the tested switch drawer is normal.

[0076] For the tests of the circuit breaker type switch drawer in the above three states, if the indication is correct under the corresponding working conditions, it indicates that the tested switch drawer is normal; if there is a situation where no indication is issued, corresponding inspections need to be carried out on this switch drawer.

[0077] II. Contactor type switch drawer test. Select the second connection method between the male plug A2 and the switch drawer to be tested. Since this type of connection is for off-line use and the CT circuit of the switch drawer cannot be connected to the circuit, resulting in the leakage detection protection of the switch drawer to act, it is necessary to connect the two leakage CT ports of the switch drawer to be tested with a short-circuit resistor.

[0078] 2.1. Simulate closing. Press the closing button F1 to simulate closing. The 48V DC power will be sent to the second pin of the test female plug A1 through the closing button F1, and then to the second pin of the male plug A2. According to the requirements of this type of contactor type switch under this condition, the closing command has been sent to the DCS operation command terminal, and the internal contactor of this switch drawer realizes the closing operation. According to the working conditions of this type of switch, the DCS command common terminal and the DCS operation indication terminal of the tested switch drawer issue a closing indication command. At this time, there should be a conductive state between the fourth and fifth pins connecting the male plug A2. According to Figure 3 It can be concluded that the 5V positive power supply passes through the first diode D12, through the DCS command common terminal, the DCS operation indication terminal, and the fourth resistor R4, and returns to the 5V negative through the fourth closing indication light-emitting diode D4. At this time, the fourth closing indication light-emitting diode D4 is lit, indicating that the closing function of the tested switch drawer is normal.

[0079] 2.2. Simulate opening the switch. Press the opening button F2 to simulate opening the switch. 48V DC power will be sent through the opening button F2 to the third pin of the test female socket A1, and then to the third pin of the connected male socket A2. According to the requirements of this type of operating condition of the contactor-type switch drawer, the opening command has been sent to the DCS stop command terminal. The internal contactor of this switch drawer realizes the opening operation. According to the requirements of this type of switch and this type of operating condition, the DCS command common terminal and the DCS stop indication terminal send out the opening indication instruction. At this time, the DCS command common terminal and the DCS stop indication terminal should be in a conducting state. According to Figure 3 it can be concluded that the 5V positive-polarity power supply passes through the first diode D12, through the conduction between the fourth and sixth pins of the test female socket A1 and the fifth resistor R5, and returns to the 5V negative pole through the closing indication fifth light-emitting diode D5. At this time, the opening indication fifth light-emitting diode D5 is lit, indicating that the opening function of the measured switch drawer is normal.

[0080] 2.3. Fault. Close the contactor in the switch drawer and manually press the test button of the thermal relay K to simulate an overcurrent fault. According to the requirements of this type of operating condition of the switch drawer, when the DCS command common terminal and the DCS stop indication terminal send out the opening instruction, the fault signal terminal will also send out a fault signal at the same time. At this time, the two ports of the fault signal should be in a conducting state. According to Figure 3 it can be concluded that the 5V positive-polarity power supply passes through the second diode D13, through the seventh and eighth pins of the test female socket A1 and the sixth resistor R6, and returns to the 5V negative pole through the fault indication sixth light-emitting diode D6. When the opening indication fifth light-emitting diode D5 is lit, the fault indication sixth light-emitting diode D6 is also lit, indicating that the test of the fault indication is normal. At this time, perform a reset operation on the thermal relay K. According to this situation, the two ports of the fault signal will also stop sending out the fault signal at the same time. At this time, the two ports of the fault signal should be in an open state. According to Figure 3 it can be concluded that the 5V positive-polarity power supply cannot return to the 5V negative pole through the sixth light-emitting diode D6, and the fault indication sixth light-emitting diode D6 cannot be lit, indicating that the fault reset operation is normal.

[0081] For the tests of the contactor-type switch drawer in the above several states, each time the indicator light that is required to be lit must be lit under the corresponding operating conditions. If there is a situation where no indication is sent out, the corresponding inspection of this switch drawer is required.

[0082] III. Test of the reversible contactor-type switch drawer. Select the third connection method between the male socket A2 and the switch drawer to be tested.

[0083] 3.1. Simulate valve opening. Press the closing button F1 to simulate closing (the function is the same as valve opening). 48V DC power will be sent to the second pin of the test female plug A1 through the closing button F1, and then to the second pin of the connecting male plug A2. According to the requirements of this type of reversible contactor switch under this working condition, the valve opening command has been sent to the DCS command valve opening end of the switch. The internal contactor of this switch realizes the valve opening operation. According to the working condition of this type of switch, the common end and the valve opening indication end of the tested switch drawer send out a valve opening indication command. At this time, the common end and the valve opening indication end of the tested switch drawer should be in a conducting state. According to Figure 3 it can be obtained that the 5V positive power supply passes through the first diode D12, through the fourth pin, the fifth pin of the test female plug A1 and the fourth resistor R4, and returns to the 5V negative through the fourth light-emitting diode D4 of the valve opening indication. At this time, the fourth light-emitting diode D4 of the valve opening indication is lit, indicating that the valve opening function of the tested switch drawer is normal.

[0084] 3.2. Simulate valve closing. Press the opening button F2 to simulate opening (the function is the same as valve closing). 48V DC power will be sent to the third pin of the test female plug A1 through the opening button F2, and then to the third pin of the connecting male plug A2. According to the requirements of this type of reversible contactor switch under this working condition, the valve closing command has been sent to the DCS command valve closing end of the tested switch drawer. The internal contactor of this switch realizes the valve closing operation. According to the working condition of this type of switch, the common end and the valve closing indication end of the tested switch drawer send out a valve closing indication command. At this time, the common end and the valve closing indication end of the tested switch drawer should be in a conducting state. According to Figure 3 it can be obtained that the 5V positive power supply passes through the first diode D12, through the fourth pin, the sixth pin of the test female plug A1 and the fifth resistor R5, and returns to the 5V negative through the fifth light-emitting diode D5 of the valve closing indication. At this time, the fifth light-emitting diode D5 of the valve closing indication is lit, indicating that the valve closing function of the tested switch drawer is normal.

[0085] 3.3. Fault. Manually press the test button of the thermal relay K to simulate an overcurrent fault. According to the requirements of this type of switch under this working condition, the two ports of the fault signal of the tested switch drawer will send out a fault signal. At this time, the two ports of the fault signal of the tested switch drawer should be in a conducting state. According to Figure 3 it can be obtained that the 5V positive power supply passes through the second diode D13, through the seventh pin, the eighth pin of the test female plug A1 and the sixth resistor R6, and returns to the 5V negative through the sixth light-emitting diode D6 of the fault indication. When the fifth light-emitting diode D5 of the opening indication is lit, the sixth light-emitting diode D6 of the fault indication is also lit, indicating that the fault indication of the tested switch drawer is normal. At this time, perform a reset operation on the thermal relay K. According to this situation, the two ports of the fault signal of the tested switch drawer will also stop sending out a fault signal at the same time. At this time, the two ports of the fault signal of the tested switch drawer should be in an open state. According to Figure 3It can be concluded that the 5V positive power supply cannot return to the 5V negative through the sixth light-emitting diode D6, indicating that the sixth light-emitting diode D6 cannot be lit, and the fault reset operation is normal.

[0086] Just turn off the power supply after the entire test is completed.

[0087] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A switch drawer test circuit, characterized in that, Comprising: A voltage transformation component for accessing alternating current to output multiple paths of direct current voltage for testing; A voltage output component connected to the voltage transformation component for indicating, displaying, and supplying the multiple paths of direct current voltage; A testing component connected to the voltage transformation component for connecting a switch drawer to be tested and indicating the state of the switch drawer to be tested; And A closing and opening simulation unit connected to the voltage transformation component and the testing component for simulating a closing operation instruction and an opening operation instruction of the switch drawer to be tested to perform an off-line test on the switch drawer to be tested; The voltage transformation component includes a fuse, a power switch, a power conversion module, a first resistor for current limiting, and a power indicator light; The live wire of the alternating current is connected to the first end of the fuse; the second end of the fuse is connected to the first input terminal of the power switch; the neutral wire of the alternating current is connected to the second input terminal of the power switch; the output terminal of the power switch is connected to the input terminal of the power conversion module; the output terminal of the power conversion module includes a first direct current loop output terminal, a second direct current loop output terminal, a third direct current loop output terminal, and a fourth direct current loop output terminal; the positive pole of the fourth direct current loop output terminal is connected to the first end of the first resistor; the second end of the first resistor is connected to the positive pole of the power indicator light; the negative pole of the power indicator light is connected to the negative pole of the fourth direct current loop output terminal; The voltage output component includes an output switch, a relay, a reverse absorption diode, a first voltmeter, a second voltmeter, a third voltmeter, a first direct current socket, a second direct current socket, a third direct current socket, a first direct current indication loop, a second direct current indication loop, and a third direct current indication loop; The positive pole of the second direct current loop output terminal is connected to the first end of the output switch; the second end of the output switch is connected to the negative pole of the reverse absorption diode and the first end of the relay; the negative pole of the second direct current loop output terminal is connected to the positive pole of the reverse absorption diode and the second end of the relay; The first direct current loop output terminal is connected to the first direct current socket through the first set of normally open contacts of the relay; the first direct current socket is connected to the input end of the first direct current indication loop; the first voltmeter is connected in parallel between the two poles of the first direct current socket; The second direct current loop output terminal is connected to the second direct current socket through the second set of normally open contacts of the relay; the second direct current socket is connected to the input end of the second direct current indication loop; the first voltmeter is connected in parallel between the two poles of the second direct current socket; The third direct current loop output terminal is connected to the third direct current socket through the third set of normally open contacts of the relay; the third direct current socket is connected to the input end of the third direct current indication loop; the first voltmeter is connected in parallel between the two poles of the third direct current socket; wherein, the output switch is a self-locking switch.

2. The switch drawer test circuit according to claim 1, wherein The closing and opening simulation unit includes a closing button, a closing indication loop, an opening indication loop, and an opening button provided with two sets of interlocking normally open contacts; The positive pole of the second DC circuit output terminal is connected to the first end of the closing button and the first end of the first set of normally open contacts of the opening button; the second end of the closing button is connected to the input terminal of the closing indication circuit; the second end of the first set of normally open contacts of the opening button is connected to the input terminal of the opening indication circuit; the negative pole of the second DC circuit output terminal is connected to the output terminals of the closing indication circuit and the opening indication circuit.

3. The switch drawer test circuit according to claim 2, wherein, The test component includes a first diode, a second diode, a third diode, a fourth diode, a closing state indication circuit, an opening state indication circuit, a fault state indication circuit, an unavailable state indication circuit, a standby state indication circuit, a test female plug, and a connection male plug that matches the test female plug; The positive pole of the fourth DC circuit output terminal is connected to the positive poles of the first diode, the second diode, the third diode, and the fourth diode; the negative pole of the fourth DC circuit output terminal is connected to the output terminals of the closing state indication circuit, the opening state indication circuit, the fault state indication circuit, the unavailable state indication circuit, and the standby state indication circuit; the pin side of the test female plug is connected to the voltage transformation component, the closing and opening simulation unit, and the test component; the slot side of the test female plug is connected to the plug side of the connection male plug; the pin side of the connection male plug is used to connect switch drawers to be tested with different functional types.

4. The switch drawer test circuit according to claim 3, wherein When the switch drawer to be tested is a circuit breaker type switch drawer, the pin side of the connection male plug and the switch drawer to be tested adopt a first connection method: The fourth pin of the connection male plug is used to connect the external indication common terminal of the switch drawer to be tested; the fifth pin of the connection male plug is used to connect the external indication closing terminal of the switch drawer to be tested; the sixth pin of the connection male plug is used to connect the external indication opening terminal of the switch drawer to be tested; the seventh pin of the connection male plug is used to connect the first end of the fault signal of the switch drawer to be tested; the eighth pin of the connection male plug is used to connect the second end of the fault signal of the switch drawer to be tested; the ninth pin of the connection male plug is used to connect the first end of the external command opening of the switch drawer to be tested; the tenth pin of the connection male plug is used to connect the second end of the external command opening of the switch drawer to be tested; the seventeenth pin of the connection male plug is used to connect the DC48V positive terminal of the switch drawer to be tested; the eighteenth pin of the connection male plug is used to connect the DC48V negative terminal of the switch drawer to be tested; the first end of the leakage CT port of the switch drawer to be tested is connected to the second end of the leakage CT port of the switch drawer to be tested through a short-circuit resistor to avoid the leakage detection protection action of the switch drawer.

5. The switch drawer test circuit according to claim 3, wherein When the switch drawer to be tested is a contactor type switch drawer, the pin side of the connection male plug and the switch drawer to be tested adopt a second connection method: The first pin of the connecting male plug is used to connect the DCS command common terminal of the switch drawer to be tested; the second pin of the connecting male plug is used to connect the DCS operation command terminal of the switch drawer to be tested; the third pin of the connecting male plug is used to connect the DCS stop command terminal of the switch drawer to be tested; The fourth pin of the connecting male plug is used to connect the DCS command common terminal of the switch drawer to be tested; the fifth pin of the connecting male plug is used to connect the DCS operation command terminal of the switch drawer to be tested; the sixth pin of the connecting male plug is used to connect the DCS stop command terminal of the switch drawer to be tested; the seventh pin of the connecting male plug is used to connect the first end of the fault signal of the switch drawer to be tested; the eighth pin of the connecting male plug is used to connect the second end of the fault signal of the switch drawer to be tested; the twenty-fourth pin of the connecting male plug is used to connect the DC110V positive terminal of the switch drawer to be tested; the twenty-sixth pin of the connecting male plug is used to connect the DC110V negative terminal of the switch drawer to be tested; the thirteenth pin of the connecting male plug is used to connect the unavailable common terminal of the switch drawer to be tested; the fourteenth pin of the connecting male plug is used to connect the unavailable signal terminal of the switch drawer to be tested; the fifteenth pin of the connecting male plug is used to connect the first end of the contactor status signal of the switch drawer to be tested; the sixteenth pin of the connecting male plug is used to connect the second end of the contactor status signal of the switch drawer to be tested; the seventeenth pin of the connecting male plug is used to connect the DC48V positive terminal of the switch drawer to be tested; the eighteenth pin of the connecting male plug is used to connect the DC48V negative terminal of the switch drawer to be tested; the first end of the leakage CT port of the switch drawer to be tested is connected to the second end of the leakage CT port of the switch drawer to be tested through a shorting resistor.

6. The switch drawer test circuit according to claim 3, wherein, When the switch drawer to be tested is a reversible contactor type switch drawer, the third connection method is adopted between the pin side of the connecting male plug and the switch drawer to be tested: The first pin of the connecting male plug is used to connect the DCS command common terminal of the switch drawer to be tested; the second pin of the connecting male plug is used to connect the DCS command valve opening terminal of the switch drawer to be tested; the third pin of the connecting male plug is used to connect the DCS command valve closing terminal of the switch drawer to be tested; the seventh pin of the connecting male plug is used to connect the first end of the fault signal of the switch drawer to be tested; the eighth pin of the connecting male plug is used to connect the second end of the fault signal of the switch drawer to be tested; the twenty-fourth pin of the connecting male plug is used to connect the DC110V positive terminal of the switch drawer to be tested; the twenty-sixth pin of the connecting male plug is used to connect the DC110V negative terminal of the switch drawer to be tested; the thirteenth pin of the connecting male plug is used to connect the unavailable terminal of the switch drawer to be tested; the fourteenth pin of the connecting male plug is used to connect the unavailable terminal of the switch drawer to be tested; the seventeenth pin of the connecting male plug is used to connect the DC48V positive terminal of the switch drawer to be tested; the eighteenth pin of the connecting male plug is used to connect the DC48V negative terminal of the switch drawer to be tested; the fourth pin of the connecting male plug is used to connect the common terminal of the switch drawer to be tested; the fifth pin of the connecting male plug is used to connect the valve opening indication terminal of the switch drawer to be tested; the sixth pin of the connecting male plug is used to connect the valve closing indication terminal of the switch drawer to be tested.

7. A switch drawer testing device, comprising a box body and an AC power input socket provided on the box body, characterized in that, The switch drawer test device includes the switch drawer test circuit according to any one of claims 1 to 6.

8. The switch drawer testing device according to claim 7, wherein, One side of the box body is provided with an operation panel; status indicator lights, operation buttons and various interfaces are arranged on the operation panel.

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