Simulation circuit breaker test device for maintenance

Abstract

The invention discloses a simulation circuit breaker test device for maintenance, and relates to the technical field of relay protection debugging and maintenance. In a relay protection debugging or maintenance process, a transmission circuit breaker needs to be operated or protected for many times. The simulation circuit breaker control system comprises a simulation circuit breaker control module, an input module, an output module, a communication module, an aviation plug interface, a battery module and a mobile control terminal, the simulation circuit breaker control module adopts a double-coil latching relay to simulate an opening and closing coil of a three-phase circuit breaker, and the simulation circuit breaker control module comprises two groups of control loops; a high-voltage circuit breaker can be replaced for verification of a protection function, a secondary circuit and the like, and two groups of control circuits lead out wires through aviation plug interfaces. The device can replace a high-voltage circuit breaker to carry out repeated protection function and secondary loop verification in a maintenance process, so that frequent operation of the high-voltage circuit breaker in an actual maintenance process is avoided, the action frequency of the high-voltage circuit breaker is remarkably reduced, and the maintenance quality and reliability of equipment are improved.

Description

Technical Field

[0001] The invention relates to the technical field of relay protection debugging and maintenance, and in particular to a simulated circuit breaker test device for maintenance. Background Art

[0002] According to statistical analysis, in recent years, high-voltage circuit breakers, especially GIS equipment abnormal events, accounted for as high as 61.5% of equipment operation-related failures. Foreign objects and hidden danger components were affected by mechanical vibrations during equipment operation, resulting in an increased probability of sudden abnormal failures.

[0003] According to the characteristics of relay protection commissioning and maintenance, the circuit breaker needs to be operated or protected multiple times during the commissioning or maintenance process, and the number of circuit breaker actions needs to be optimized. To this end, a simulated circuit breaker test device is proposed, which can replace the high-voltage circuit breaker to verify the protection function and secondary circuit during the maintenance process. After the maintenance test is completed, the high-voltage circuit breaker is driven with the least number of times to ensure the normal operation of the equipment.

[0004] The use of this simulated circuit breaker test device can significantly reduce the number of operations of high-voltage circuit breakers, which is beneficial to improving the maintenance quality of high-voltage circuit breakers, especially GIS equipment. Summary of the invention

[0005] The technical problem to be solved and the technical task proposed by the present invention are to improve and perfect the existing technical solutions, and provide a simulated circuit breaker test device for maintenance, so as to reduce the number of actions of high-voltage circuit breakers and improve the maintenance quality of high-voltage circuit breakers. To this end, the present invention adopts the following technical solutions.

[0006] A simulated circuit breaker test device for maintenance comprises a simulated circuit breaker control module, an aviation plug interface and a battery module. The simulated circuit breaker control module adopts a double-coil self-holding relay to simulate the opening and closing coils of a three-phase circuit breaker, and comprises two groups of control circuits including an opening relay, a closing relay, an intermediate relay and its extended contacts. The first group of control circuits comprises A, B, and C three-phase closing and opening, and the second group of control circuits comprises A, B, and C three-phase opening. The first group of control circuits leads out wiring by connecting to a first aviation plug interface, and the second group of control circuits leads out wiring by connecting to a second aviation plug interface. The first group of control circuits and the second control circuits are connected with opening and closing control buttons and opening and closing indicator lights. The opening and closing control buttons comprise an opening button and a closing button, and the opening and closing indicator lights comprise an opening indicator light and a closing indicator light. The battery module is connected to the simulated circuit breaker control module to provide power. During the maintenance process, it can replace the high-voltage circuit breaker to perform multiple protection function and secondary circuit verifications, thereby avoiding frequent operation of the high-voltage circuit breaker during the actual maintenance process, significantly reducing the number of actions of the high-voltage circuit breaker, and reducing mechanical wear and potential failure risks caused by operation, thereby improving the maintenance quality and reliability of high-voltage circuit breakers, especially GIS equipment.

[0007] As a preferred technical means: the simulated circuit breaker control module is connected with an input module and an output module, the input module and the output module are connected to a communication module, the communication module is connected to a mobile control terminal by wireless means, the input module is used to collect the open and close position status of the simulated circuit breaker, and transmit the status information to the mobile control terminal through the communication module, the communication module receives the opening and closing commands issued by the mobile control terminal and transmits the opening and closing commands to the output module, and the output module outputs the opening and closing commands to the simulated circuit breaker control module. Through the input module, the output module, the communication module and the mobile control terminal, the operator can remotely monitor the open and close position status of the simulated circuit breaker and obtain the status information in real time, which improves the flexibility and convenience of operation, especially in complex or difficult-to-access maintenance environments.

[0008] As a preferred technical means: the first group of control circuits are connected to the first aviation plug interface to lead out the wiring, including the first group of control power positive KM1+, the first group of control power negative KM1-, A phase closing HA, B phase closing HB, C phase closing HC, the first group of A phase opening TA1, the first group of B phase opening TB1, and the first group of C phase opening TC1; the second group of control circuits are connected to the second aviation plug interface to lead out the wiring, including the second group of control power positive KM2+, the second group of control power negative KM2-, the second group of A phase opening TA2, the second group of B phase opening TB2, and the second group of C phase opening TC2. By leading out the wiring through the aviation plug interface, the modularization and standardization of the connection interface between the group control loop and the high-voltage circuit breaker are realized, which helps to simplify the installation and debugging process, reduce maintenance costs, and improve the reliability and stability of the system. The aviation plug interface has the characteristics of quick connection and disconnection, which makes the connection between the control loop and the high-voltage circuit breaker quick and convenient, reducing downtime. The aviation plug interface usually has good insulation performance and protection level, which can effectively prevent electrical short circuits and electric shock accidents. In addition, through clear wiring identification, it can ensure that operators can accurately identify and avoid misoperation when connecting and disconnecting the control loop.

[0009] As the preferred technical means: the manual closing process starts the intermediate relay ZJ1 through the closing button closing method or the mobile terminal remote closing method. The extended contacts of ZJ1 are used to start the opening and closing coils KA1, KB1, KC1 and KA2, KB2, KC2 of the first and second control circuits to simulate the closing of the circuit breaker, and display the status through the closing indicator light and input module, and transmit the displayed status to the mobile terminal at the same time. The manual closing process is effectively realized, and the operator can flexibly choose the on-site closing button operation and remote mobile terminal operation method according to the actual situation, which improves the convenience and flexibility of the operation. The opening and closing coils of the control circuit are started through the extended contacts of the intermediate relay ZJ1, and the reliable transmission and execution of the signal are realized. The closing indicator light and input module can display the status of the circuit breaker in real time, so that the operator can intuitively understand the current status of the circuit breaker. At the same time, the status information is transmitted to the mobile terminal, realizing remote monitoring and status feedback.

[0010] As the preferred technical means: the manual opening process starts the intermediate relay ZJ2 through the opening button opening mode or the mobile terminal remote opening mode. The extended contacts of ZJ2 are used to start the opening and closing coils KA1, KB1, KC1 and KA2, KB2, KC2 of the first and second control circuits to realize the separation of the simulated circuit breaker, and display the status through the opening indicator light and input module, and transmit the displayed status to the mobile terminal at the same time. The manual opening process is effectively realized. The operator can flexibly choose the mode of on-site opening button operation and remote mobile terminal operation according to the actual situation, which improves the convenience and flexibility of operation. The opening and closing coils of the control circuit are directly started through the extended contacts of the intermediate relay ZJ1, which ensures the rapid execution of the opening operation and reduces the operation delay. The opening indicator light and input module can display the status of the circuit breaker in real time, so that the operator can understand the result of the opening operation in real time. At the same time, the status information is transmitted to the mobile terminal, realizing remote real-time monitoring of the status. The remote opening operation reduces the direct contact between the operator and the high-voltage equipment, and reduces the safety risks such as electric shock.

[0011] As the preferred technical means: the protection closing process is realized through the closing circuit HA, HB, HC by two sets of dual protection, and the closing coils KA1, KB1, KC1 and KA2, KB2, KC2 of the first control circuit and the second control circuit are started to simulate the simultaneous closing of the two control circuits of the circuit breaker. The protection closing process is effectively realized, and more accurate reclosing coordination can be achieved through the dual protection configuration. When the first set of protection is activated, the second set of protection can lock its reclosing function to prevent misoperation, thereby ensuring the accuracy and reliability of the reclosing. After a system failure, the reclosing can quickly restore power supply, reduce the power outage time and scope, thereby greatly improving the reliability of power supply and helping to maintain the stable operation of the system.

[0012] As the preferred technical means: the protection opening process starts the corresponding opening and closing coils KA1, KB1, KC1 and KA2, KB2, KC2 through the opening circuits TA1, TB1, TC1 and TA2, TB2, TC2 of the first control circuit and the second control circuit respectively through two sets of dual protection, and the state of the simulated circuit breaker is displayed through the control indication circuit of the first control circuit and the second control circuit respectively. The protection opening process is effectively realized. Through the dual protection configuration, the correct opening of the circuit breaker can be ensured. Through two independent protection systems, the opening circuits of the circuit breaker can be controlled respectively, and more accurate protection actions can be achieved. Even if one of the protection systems is interfered or misjudged, the other system can accurately judge and perform the opening operation to ensure the safe operation of the power system. The dual protection configuration and control circuit design enable faster detection and positioning of the fault point when a fault occurs. By comparing the state and indication information of the two control circuits, it can quickly determine whether the fault is caused by the protection system, the control circuit or the circuit breaker itself, so as to take corresponding measures to repair it.

[0013] As a preferred technical means: the opening and closing indicator lights of the first group of control circuits include HDA1 and LDA1 connected to KA1, HDB1 and LDB1 connected to KB1, and HDC1 and LDC1 connected to KC1, and the opening and closing indicator lights of the second group of control circuits include HDA2 and LDA2 connected to KA2, HDB2 and LDB2 connected to KB2, and HDC2 and LDC2 connected to KC2. The opening and closing indicator lights can intuitively display the current status of the circuit breaker, so that the operator can quickly understand the status of the circuit breaker and make correct decisions.

[0014] As the preferred technical means: the simulated circuit breaker control module and battery module are arranged in the chassis, the front panel of the chassis is provided with a power button, a running indicator light, an opening button and a closing button, the opening and closing indicator lights of the first group of control circuits are arranged in the first indication area on the front of the chassis, the opening and closing indicator lights of the second group of control circuits are arranged in the second indication area on the front of the chassis, and the first aviation plug interface and the second aviation plug interface are arranged on the back of the chassis. The compact structure makes the equipment easier to carry, install and deploy, and the operator can quickly and intuitively perform various operations, which improves the convenience and intuitiveness of the operation.

[0015] Beneficial effects: During the maintenance process, it can replace the high-voltage circuit breaker to perform multiple protection function and secondary circuit verifications, thereby avoiding frequent operation of the high-voltage circuit breaker during the actual maintenance process, significantly reducing the number of actions of the high-voltage circuit breaker, and reducing the mechanical wear and potential failure risks caused by operation, thereby improving the maintenance quality and reliability of high-voltage circuit breakers, especially GIS equipment. Operators can remotely monitor the open and closed position status of the simulated circuit breaker and obtain status information in real time, which improves the flexibility and convenience of operation, especially in complex or inaccessible maintenance environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the first set of control circuit electrical schematics in the present invention.

[0017] Figure 2 This is a schematic diagram of the connection principle of the first group of control circuit opening and closing indicator lights in the present invention.

[0018] Figure 3 This is the electrical schematic diagram of the second control circuit of the present invention.

[0019] Figure 4 This is a schematic diagram of the connection principle of the second group of control circuit opening and closing indicator lights of the present invention.

[0020] Figure 5 It is a schematic diagram of the communication principle between the simulated circuit breaker and the mobile terminal in the present invention.

[0021] Figure 6 It is the electrical schematic diagram of the input module in the present invention.

[0022] Figure 7 It is the electrical schematic diagram of the output module in the present invention.

[0023] Figure 8 It is a front schematic diagram of the simulated circuit breaker test device in the present invention.

[0024] Fig. 9 It is a schematic diagram of the back side of the simulated circuit breaker test device in the present invention.

[0025] Fig.10 This is a schematic diagram of the first aviation plug interface in the present invention.

[0026] Fig.11 It is a schematic diagram of the second aviation plug interface in the present invention.

[0027] Figure 8 , 9 Middle: 1. Power button; 2. Operation indicator light; 3. First indication area of ​​control circuit; 4. Second indication area of ​​control circuit; 5. Closing button; 6. Opening button; 7. Chassis; 8. First aviation plug interface; 9. Second aviation plug interface. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings.

[0029] like Figure 1-4 As shown, a simulated circuit breaker test device for maintenance includes a simulated circuit breaker control module, an aviation plug interface and a battery module. The simulated circuit breaker control module uses a double-coil self-holding relay to simulate the opening and closing coils of a three-phase circuit breaker, including two groups of control circuits including an opening relay, a closing relay, an intermediate relay and its extended contacts. The first group of control circuits includes A, B, and C three-phase closing and opening, and the second group of control circuits includes A, B, and C three-phase opening. It can replace the high-voltage circuit breaker to verify the protection function and secondary circuit. The first group of control circuits are connected to the first aviation plug interface 8 for wiring, and the second group of control circuits are connected to the second aviation plug interface 9 for wiring. The first group of control circuits and the second control circuits are connected to opening and closing control buttons and opening and closing indicator lights. The opening and closing control buttons include an opening button 6 and a closing button 5. The opening and closing indicator lights include an opening indicator light and a closing indicator light. The two groups of control circuits are displayed in phases respectively to provide different display states for realizing different protection actions. Among them, the green light indicates that the simulated circuit breaker is in the open position, and the red light indicates that the simulated circuit breaker is in the closed position. The battery module is connected to the simulated circuit breaker control module to provide power. The battery module uses a 24V lithium battery. The battery is arranged in the battery compartment of the chassis 7 and is a detachable structure, which is convenient for removing external charging. Figure 5-7 As shown, the simulated circuit breaker control module is connected to an input module and an output module, a 24V lithium battery is connected to the input module to provide a sampling power supply, the input module and the output module are connected to the communication module, the communication module is connected to the mobile control terminal via the 5G communication mode, the input module is used to collect the opening and closing position status of the simulated circuit breaker, and transmit the status information to the mobile control terminal via the communication module, the communication module receives the opening and closing commands issued by the mobile control terminal and transmits the opening and closing commands to the output module, and the output module outputs the opening and closing commands to the simulated circuit breaker control module. The simulated circuit breaker control module is arranged in the chassis 7, as shown in FIG. Figure 8 , 9 As shown, a power button 1, an operation indicator light 2, an opening button 6 and a closing button 5 are provided on the front panel of the chassis 7. The opening and closing indicator lights of the first group of control circuits are arranged in the first indication area 3 of the control circuit on the front of the chassis 7. The opening and closing indicator lights of the second group of control circuits are arranged in the second indication area 4 of the control circuit on the front of the chassis 7. The first aviation plug interface 8 and the second aviation plug interface 9 are arranged on the back of the chassis 7.

[0030] The first control loop is connected to the first aviation plug interface 8 to lead out the wiring, such as Fig.10As shown, the first aviation plug interface 8 adopts an 8-core interface, including the first group of control power positive KM1+, the first group of control power negative KM1-, A phase closing HA, B phase closing HB, C phase closing HC, the first group of A phase opening TA1, the first group of B phase opening TB1, the first group of C phase opening TC1; the second group of control loops are connected to the second aviation plug interface 9 to lead out the wiring, as shown Fig.11 As shown, the second aviation plug interface 9 adopts a 6-core interface, including the second group of control power positive KM2+, the second group of control power negative KM2-, the second group of A phase disconnect TA2, the second group of B phase disconnect TB2, and the second group of C phase disconnect TC2. Through the aviation plug interface, the wiring is led out, and the modularization and standardization of the connection interface between the group control loop and the high-voltage circuit breaker are realized, which helps to simplify the installation and commissioning process, reduce maintenance costs, and improve the reliability and stability of the system. The aviation plug interface has the characteristics of fast connection and disconnection, which makes the connection between the control loop and the high-voltage circuit breaker quick and convenient, reducing downtime. The aviation plug interface usually has good insulation performance and protection level, which can effectively prevent the occurrence of electrical short circuits and electric shock accidents. In addition, through clear wiring identification, it can ensure that the operator can accurately identify and avoid misoperation when connecting and disconnecting the control loop.

[0031] Manual closing process: start the intermediate relay ZJ1 through the closing button 5 closing mode or the mobile terminal remote closing mode. The extended contacts of ZJ1 are used to start the opening and closing coils KA1, KB1, KC1 and KA2, KB2, KC2 of the first and second control circuits to simulate the closing of the circuit breaker, and display the status through the closing indicator light and input module, and transmit the displayed status to the mobile terminal. The manual closing process is effectively realized. The operator can flexibly choose the mode of on-site closing button 5 operation and remote mobile terminal operation according to the actual situation, which improves the convenience and flexibility of operation. The opening and closing coils of the control circuit are started through the extended contacts of the intermediate relay ZJ1, and the reliable transmission and execution of the signal are realized. The closing indicator light and input module can display the status of the circuit breaker in real time, so that the operator can intuitively understand the current status of the circuit breaker. At the same time, the status information is transmitted to the mobile terminal, realizing remote monitoring and status feedback.

[0032] Manual opening process: start the intermediate relay ZJ2 through the opening mode of the opening button 6 or the remote opening mode of the mobile terminal. The extended contacts of ZJ2 are used to start the opening and closing coils KA1, KB1, KC1 and KA2, KB2, KC2 of the first and second control circuits to realize the separation of the simulated circuit breaker, and display the status through the opening indicator light and input module, and transmit the displayed status to the mobile terminal at the same time. Effectively realize the manual opening process, the operator can flexibly choose the mode of on-site opening button 6 operation and remote mobile terminal operation according to the actual situation, which improves the convenience and flexibility of operation. The opening and closing coils of the control circuit are directly started through the extended contacts of the intermediate relay ZJ1, ensuring the rapid execution of the opening operation and reducing the operation delay. The opening indicator light and input module can display the status of the circuit breaker in real time, so that the operator can understand the result of the opening operation in real time. At the same time, the status information is transmitted to the mobile terminal, realizing remote real-time monitoring of the status. The remote opening operation reduces the direct contact between the operator and the high-voltage equipment, reducing the safety risks such as electric shock.

[0033] Protection closing process: Through the dual protection, the reclosing circuits HA, HB, and HC are used to realize reclosing, and the opening and closing coils KA1, KB1, KC1 and KA2, KB2, KC2 of the first and second control circuits are started to simulate the simultaneous closing of the two control circuits of the circuit breaker. The protection closing process is effectively realized, and more accurate reclosing coordination can be achieved through the dual protection configuration. When the first set of protection is activated, the second set of protection can lock its reclosing function to prevent misoperation, thereby ensuring the accuracy and reliability of the reclosing. After a system failure, the reclosing can quickly restore power supply, reduce the power outage time and scope, thereby greatly improving the reliability of power supply and helping to maintain the stable operation of the system.

[0034] Protection tripping process: Through the two sets of dual protection, the corresponding opening and closing coils KA1, KB1, KC1 and KA2, KB2, KC2 are started through the opening circuits TA1, TB1, TC1 and TA2, TB2, TC2 of the first control circuit and the second control circuit respectively. The status of the simulated circuit breaker is displayed through the control indication circuit of the first control circuit and the second control circuit respectively. The protection tripping process is effectively realized. Through the dual protection configuration, the correct opening of the simulated circuit breaker can be ensured. Through two independent protection systems, the opening circuits of the simulated circuit breaker can be controlled respectively, which can achieve more accurate protection actions. Even if one of the protection systems is interfered or misjudged, the other system can accurately judge and perform the tripping operation to ensure the safe operation of the power system. The dual protection configuration and control circuit design enable faster detection and positioning of the fault point in the event of a fault. By comparing the status and indication information of the two control circuits, it can be quickly determined whether the fault is caused by the protection system, the control circuit or the circuit breaker itself, so that corresponding measures can be taken to repair it.

[0035] The opening and closing indicator lights of the first control loop include HDA1 and LDA1 connected to KA1, HDB1 and LDB1 connected to KB1, and HDC1 and LDC1 connected to KC1. The opening and closing indicator lights of the second control loop include HDA2 and LDA2 connected to KA2, HDB2 and LDB2 connected to KB2, and HDC2 and LDC2 connected to KC2. The opening and closing indicator lights can intuitively display the current status of the simulated circuit breaker, so that the operator can quickly understand the status of the circuit breaker and make correct decisions.

[0036] Before using the simulated circuit breaker test device, place a charged 24V lithium battery into the device, turn on the power button 1, ensure that the device is running normally, turn on the mobile control terminal, and ensure that the communication connection with the simulated circuit breaker test device is normal.

[0037] According to the actual required state of the high-voltage circuit breaker on site, the simulated circuit breaker test device is placed in the open position or the closed position.

[0038] Switch the "remote / local" switch of the on-site high-voltage circuit breaker to the "local" position, cut off the remote control or protection export circuit, connect the lead-out wiring of the aviation plug interface to the corresponding position of the switch terminal box or control cabinet, and ensure that it is firm. It is strictly forbidden to remove the secondary wiring.

[0039] The actual remote control simulates the circuit breaker test device to ensure that the secondary circuit is normal, and then the transmission and verification of the protection function are carried out in turn. The open and closed states of the two groups of closing coils of the test device can be viewed through the mobile terminal.

[0040] After the test is completed, remove the wiring and restore the status of the high-voltage circuit breaker on site.

[0041] This device can replace the high-voltage circuit breaker during the maintenance process to perform multiple protection functions and secondary circuit verifications, thereby avoiding frequent operation of the high-voltage circuit breaker during the actual maintenance process, significantly reducing the number of actions of the high-voltage circuit breaker, and reducing mechanical wear and potential failure risks caused by operation, thereby improving the maintenance quality and reliability of high-voltage circuit breakers, especially GIS equipment.

[0042] The simulated circuit breaker test device for maintenance shown above is a specific embodiment of the present invention, which has embodied the outstanding substantial features and significant progress of the present invention. According to actual use needs and under the guidance of the present invention, equivalent modifications in shape, structure, etc. can be made to it, which are all within the protection scope of this scheme.

Claims

1. A simulated circuit breaker test device for maintenance, characterized in that: The invention comprises a simulated circuit breaker control module, an aviation plug interface and a battery module. The simulated circuit breaker control module adopts a double-coil self-holding relay to simulate the opening and closing coils of a three-phase circuit breaker. The simulated circuit breaker control module comprises two groups of control circuits including an opening relay, a closing relay, an intermediate relay and its extended contacts. The first group of control circuits comprises A, B, and C three-phase closing and opening, and the second group of control circuits comprises A, B, and C three-phase opening. The first group of control circuits leads out wiring by connecting to the first aviation plug interface, and the second group of control circuits leads out wiring by connecting to the second aviation plug interface. The first group of control circuits and the second control circuits are connected with opening and closing control buttons and opening and closing indicator lights. The opening and closing control buttons comprise an opening button and a closing button, and the opening and closing indicator lights comprise an opening indicator light and a closing indicator light. The battery module is connected to the simulated circuit breaker control module to provide power.

2. A simulated circuit breaker test device for maintenance according to claim 1, characterized in that: The simulated circuit breaker control module is connected to an input module and an output module, the input module and the output module are connected to a communication module, the communication module is wirelessly connected to a mobile control terminal, the input module is used to collect the opening and closing position status of the simulated circuit breaker, and transmit the status information to the mobile control terminal through the communication module, the communication module receives the opening and closing commands issued by the mobile control terminal and transmits the opening and closing commands to the output module, and the output module outputs the opening and closing commands to the simulated circuit breaker control module.

3. A simulated circuit breaker test device for maintenance according to claim 2, characterized in that: The first group of control circuits are connected to the first aviation plug interface for wiring, including the first group of control power positive KM1+, the first group of control power negative KM1-, A phase closing HA, B phase closing HB, C phase closing HC, the first group of A phase opening TA1, the first group of B phase opening TB1, and the first group of C phase opening TC1; the second group of control circuits are connected to the second aviation plug interface for wiring, including the second group of control power positive KM2+, the second group of control power negative KM2-, the second group of A phase opening TA2, the second group of B phase opening TB2, and the second group of C phase opening TC2.

4. A simulated circuit breaker test device for maintenance according to claim 3, characterized in that: The manual closing process starts the intermediate relay ZJ1 through the closing button closing method or the remote closing method of the mobile terminal. The extended contacts of ZJ1 are used to start the opening and closing coils KA1, KB1, KC1 and KA2, KB2, KC2 of the first control circuit and the second control circuit to simulate the closing of the circuit breaker, and display the status through the closing indicator light and the input module, and transmit the displayed status to the mobile terminal.

5. A simulated circuit breaker test device for maintenance according to claim 4, characterized in that: The manual opening process starts the intermediate relay ZJ2 through the opening button opening method or the remote opening method of the mobile terminal. The extended contacts of ZJ2 are used to start the opening and closing coils KA1, KB1, KC1 and KA2, KB2, KC2 of the first control circuit and the second control circuit to realize the separation of the simulated circuit breaker, and display the status through the opening indicator light and input module, and transmit the displayed status to the mobile terminal.

6. A simulated circuit breaker test device for maintenance according to claim 5, characterized in that: The protection closing process is achieved through two sets of duplicated protection through closing circuits HA, HB, and HC to realize reclosing, start the opening and closing coils KA1, KB1, KC1 and KA2, KB2, KC2 of the first control circuit and the second control circuit, and realize the simultaneous closing of the two control circuits of the simulated circuit breaker.

7. A simulated circuit breaker test device for maintenance according to claim 6, characterized in that: The protection tripping process starts the corresponding opening and closing coils KA1, KB1, KC1 and KA2, KB2, KC2 through the two sets of duplicated protection through the opening circuits TA1, TB1, TC1 and TA2, TB2, TC2 of the first control circuit and the second control circuit. The status of the simulated circuit breaker is displayed through the control indicator circuit of the first control circuit and the second control circuit.

8. A simulated circuit breaker test device for maintenance according to claim 7, characterized in that: The opening and closing indicator lights of the first group of control circuits include HDA1 and LDA1 connected to KA1, HDB1 and LDB1 connected to KB1, and HDC1 and LDC1 connected to KC1; the opening and closing indicator lights of the second group of control circuits include HDA2 and LDA2 connected to KA2, HDB2 and LDB2 connected to KB2, and HDC2 and LDC2 connected to KC2.

9. A simulated circuit breaker test device for maintenance according to claim 8, characterized in that: The simulated circuit breaker control module and battery module are arranged in the chassis, and the front panel of the chassis is provided with a power button, an operation indicator light, an opening button and a closing button. The opening and closing indicator lights of the first group of control circuits are arranged in the first indication area on the front of the chassis, and the opening and closing indicator lights of the second group of control circuits are arranged in the second indication area on the front of the chassis. The first aviation plug interface and the second aviation plug interface are arranged on the back of the chassis.

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