A circuit breaker anti-jump test circuit

Abstract

The utility model relates to circuit breaker detection maintenance technical field especially a circuit breaker anti -jump test loop. On -off circuit, fault simulation loop, operation auxiliary assembly, on -off circuit output end passes through relay module and connects circuit breaker control closing circuit, fault simulation loop receives input end fault signal, and the protection terminal is converged, and operation auxiliary assembly is parallelly connected in on -off circuit. The utility model through test handle and test pressboard simulate closing order contact sticking, avoided the risk of misoperation caused by artificial short circuit, guaranteed personnel and equipment safety, and test loop operation was simple and convenient, and only needed to put in test pressboard and rotate test handle to carry out the test, and many people cooperation was not needed, improved test efficiency, shortened equipment commissioning time, guaranteed power grid operation stability, and test loop design was simple and clear, easy to realize, reduced the possibility of misoperation, and improved the reliability of test result.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker testing and maintenance technology, and in particular to a circuit breaker anti-pumping test circuit. Background Technology

[0002] Circuit breaker closing circuits are generally designed with anti-pumping functionality to prevent abnormal repeated closing of the circuit breaker. To ensure the reliable operation of the anti-pumping circuit, it is necessary to conduct anti-pumping function verification work in conjunction with the circuit breaker's scheduled maintenance. The anti-pumping test method simulates the closing contacts sticking together, and then by applying a fault quantity to the protection device, the protection device is activated to trip the circuit breaker. Observing whether the circuit breaker continues to close determines whether the anti-pumping function is normal.

[0003] The commonly used method is to switch the circuit breaker operation mode to a remote location and manually short-circuit the remote closing contact of the control box to simulate contact adhesion. However, the existing method has the following disadvantages: 1. Manually shorting the closing contact poses a risk of accidental short-circuiting, which may cause personal injury or accidental tripping of the operating switch; 2. Manually shorting the closing contact has low testing efficiency, requires multiple personnel to cooperate, and in severe cases may even affect the timeliness of equipment commissioning and the stability of power grid operation.

[0004] Therefore, there is a need for a circuit breaker anti-pumping test circuit that can eliminate the risk of accidental short circuits, improve operational efficiency, and ensure the safety of personnel and equipment to meet the needs of the current working environment. Utility Model Content

[0005] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of this section, the abstract and the title of this utility model. Such simplifications or omissions shall not be used to limit the scope of this utility model.

[0006] Given that the above-mentioned existing technologies involve manually shorting the circuit breaker contacts, there is a risk of accidental short-circuiting, which may cause personal injury or accidental tripping of operating switches. Manually shorting the circuit breaker contacts is inefficient, requires the cooperation of multiple personnel, and in severe cases may even affect the timeliness of equipment commissioning and the stability of power grid operation.

[0007] Therefore, the technical problem to be solved by this utility model is to design a circuit breaker anti-pumping test circuit that can eliminate the risk of accidental short circuits, improve operating efficiency, and ensure the safety of personnel and equipment to meet the needs of the existing working environment.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a circuit breaker anti-pumping test circuit, comprising,

[0009] On / off circuit, fault simulation circuit, operation auxiliary assembly;

[0010] The output of the on / off circuit is connected to the circuit breaker control closing circuit via a relay module;

[0011] The fault simulation circuit receives the fault signal from the input terminal and feeds it into the protection terminal.

[0012] The operation auxiliary assembly is connected in parallel to the on / off circuit.

[0013] As an improvement to this utility model

[0014] The operating aid assembly includes an adjustment switch and an adjustment pressure plate;

[0015] The input terminal of the regulating switch is connected to the circuit for opening and closing, and the output terminal of the regulating switch is coordinated with the input terminal of the regulating pressure plate.

[0016] Adjust the output end of the pressure plate and connect the disconnect circuit.

[0017] As an improvement to this utility model

[0018] The relay module includes a start switch, the other end of which is connected to the circuit breaker control closing circuit;

[0019] The circuit breaker control closing circuit receives the closing command based on the action of the start switch.

[0020] As an improvement to this utility model

[0021] The fault simulation circuit connects the circuit breaker control closing circuit and the protection terminal;

[0022] A signal input terminal is installed between the protection terminal and the circuit breaker control closing circuit;

[0023] The signal input terminal is located on the fault simulation circuit.

[0024] As an improvement to this utility model

[0025] The fault simulation module is connected to the signal input terminal, through which a fault simulation signal is input.

[0026] The protection terminal reads the fault simulation signal, closes the internal node, and outputs a trip command.

[0027] As an improvement to this utility model

[0028] The protection terminal is connected to the trip output terminal;

[0029] The trip output terminal is connected to the signal extension circuit, and the output terminal of the signal extension circuit is connected to the circuit breaker control trip circuit.

[0030] As an improvement to this utility model

[0031] The output terminals of the circuit breaker control closing circuit and the circuit breaker control opening circuit are connected to the main circuit for opening and closing.

[0032] The closing command first enters the main circuit for opening and closing through the circuit breaker control closing circuit, and the circuit breaker closes.

[0033] After the tripping command is issued, it enters the tripping and closing main circuit through the tripping control circuit, and the circuit breaker trips.

[0034] Observe the closing and opening actions of the circuit breaker and test its anti-pumping function.

[0035] The beneficial effects of this utility model are as follows: By simulating the closing of the circuit breaker through the test handle and the test pressure plate to make the contacts stick together, the risk of misoperation caused by human short circuit is avoided, ensuring the safety of personnel and equipment. The test circuit is simple and convenient to operate. The test can be carried out by simply inserting the test pressure plate and rotating the test handle. No multiple people are required to cooperate, which improves the test efficiency, shortens the equipment commissioning time, and ensures the stability of the power grid operation. The test circuit design is simple and clear, easy to implement, reduces the possibility of misoperation, and improves the reliability of the test results. Attached Figure Description

[0036] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0037] Figure 1 This is a schematic diagram of the anti-pumping test circuit of the circuit breaker of this utility model.

[0038] Figure 2 This is a schematic diagram of the peripheral architecture of the interruption circuit control closing circuit of this utility model.

[0039] Figure 3 This is a schematic diagram of the fault simulation circuit and protection terminal circuit architecture in this utility model.

[0040] Figure 4 This is a schematic diagram of the circuit architecture of the signal extension circuit and the circuit breaker control circuit in this utility model.

[0041] Figure 5 This is a schematic diagram of the internal circuit and trip output terminal architecture of the protection terminal in this utility model.

[0042] Figure 6 This is a schematic diagram of the internal structure of the main circuit for opening and closing the circuit in this utility model. Detailed Implementation

[0043] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0044] Example 1

[0045] Reference Figure 1 This embodiment provides a circuit breaker anti-pumping test circuit.

[0046] The on / off circuit 1 is responsible for controlling the closing and opening operations of the circuit breaker. It is usually controlled remotely by the operator. The output of the on / off circuit 1 is connected to the relay module 11 so that the opening and closing control signal can be transmitted to the circuit breaker control closing circuit 12. The fault simulation circuit 2 receives the externally input fault signal and summarizes it to the protection terminal 21 to simulate the fault situation in actual operation.

[0047] The input interface of fault simulation circuit 2 adopts a standardized digital signal input method, which is compatible with a variety of common fault signal formats. Through a dedicated signal conditioning unit, fault signals from different sources are adapted and processed to ensure the accuracy and real-time performance of the signals. The operation auxiliary assembly 3 is connected in parallel to the on / off circuit 1, which can assist in completing complex operation tasks, replace the existing manual short-circuit action, and reduce the need for manual intervention.

[0048] During the circuit breaker anti-pumping test, the original manual short-circuiting can be replaced by operating the auxiliary assembly 3 to connect and simulate the sticking of the closing contacts. A fault signal is input into the fault simulation circuit 2, and the fault signal enters the protection terminal 21 from the output terminal of the fault simulation circuit 2.

[0049] After receiving a fault signal, the protection terminal 21 will trip the circuit breaker. At this time, the staff can observe whether the circuit breaker continues to close to determine whether the circuit anti-pumping function is normal.

[0050] Example 2

[0051] Reference Figures 1-4 This embodiment is based on the previous embodiment, and differs from the previous embodiment in that:

[0052] The operating auxiliary assembly 3 includes an adjusting switch 31 and an adjusting plate 32. The input terminal of the adjusting switch 31 is connected in parallel with the switching circuit 1, and the output terminal of the adjusting switch 31 is matched with the input terminal of the adjusting plate 32. The output terminal of the adjusting plate 32 is also connected in parallel with the switching circuit 1. This design allows the operator to precisely control the current of the switching circuit 1 by adjusting the adjusting switch 31 and the adjusting plate 32, thereby realizing the simulated operation of the circuit breaker closing circuit, achieving connection and simulating contact adhesion without manual short-circuiting.

[0053] The relay module 11 includes a start switch 111. One end of the start switch 111 is connected to the circuit breaker control closing circuit 12. When the start switch 111 is activated, the on / off circuit 1 and the circuit breaker control closing circuit 12 are connected. The circuit breaker control closing circuit 12 receives the closing command, thereby triggering the closing action of the circuit breaker. This design ensures the controllability and safety of the test circuit.

[0054] The fault simulation circuit 2 connects the circuit breaking control closing circuit 12 and the protection terminal 21. A set of signal input terminals 211 is also fixedly installed between the protection terminal 21 and the circuit breaking control closing circuit 12. The signal input terminals 211 are still located on the fault simulation circuit 2. The fault simulation module 6 is connected to the signal input terminals 211 and inputs the fault simulation signal along the fault simulation circuit 2 through the signal input terminals 211.

[0055] The fault simulation module 6 can generate various types of fault signals, such as short circuits, overloads, and grounding faults. These signals are simulated using precise current and voltage regulators, ensuring the realism of the fault signals. For example, during a short circuit fault simulation, the module can generate a high current in a short time, triggering the protection terminal 21.

[0056] In this scheme, the simulated fault signal is mainly an overcurrent signal, exceeding the safe current value. Therefore, it can trigger the protection action of the protection terminal 21. The protection terminal 21 has a built-in microprocessor that can monitor and analyze the input simulated fault signal in real time. When a fault signal is detected, the protection terminal 21 immediately executes the preset logic judgment, closes the internal node, and outputs a trip command. This process simulates the rapid response of an actual protection device when a fault is detected.

[0057] Example 3

[0058] Reference Figures 1-6 This embodiment is based on the previous embodiment, and differs from the previous embodiment in that:

[0059] The protection terminal 21 integrates advanced protection logic circuitry. When a fault simulation signal is detected, the protection logic circuitry activates a trip command. This trip command is output through a dedicated trip output terminal 212. The trip output terminal 212 employs a highly reliable, low-contact-resistance connector design to ensure stable transmission of the trip signal.

[0060] After the trip command is output through the trip output terminal 212, it enters the signal extension circuit 4. The output of the signal extension circuit 4 transmits the trip command to the circuit breaker control circuit 41. The circuit breaker control circuit 41 is designed with a dedicated signal processing unit that can receive and verify the validity of the trip command. Once the verification is successful, the circuit breaker control circuit will execute the circuit breaker's tripping operation.

[0061] The output terminals of the circuit breaker control closing circuit 12 and the circuit breaker control opening circuit 41 are respectively connected to the circuit breaker control circuit 5. The circuit breaker control circuit 5 is one of the core parts of the circuit breaker control system, and is responsible for receiving and executing closing and opening commands.

[0062] The closing command first enters the main closing and tripping circuit 5 through the circuit breaker control closing circuit 12, triggering the closing action of the circuit breaker. Subsequently, if the protection terminal 21 detects a fault signal and issues a tripping command, the tripping command will enter the main closing and tripping circuit 5 through the circuit breaker control tripping circuit 41, executing the tripping action of the circuit breaker. During the closing and tripping operations of the circuit breaker, the operator can observe the closing and tripping actions of the circuit breaker to test its anti-pumping function.

[0063] This embodiment details the components and working principles of the circuit breaker anti-pumping test circuit, incorporating electrical terminology and technical details to ensure clarity and operability. Through the coordinated operation of the signal extension circuit 4, trip output terminal 212, circuit breaker control circuit 41, and the main opening and closing circuit 5, this invention can efficiently and safely simulate and test the anti-pumping function of the circuit breaker, providing strong support for the stable operation of the power system. This technical solution not only improves the efficiency and safety of the test but also reduces operation and maintenance costs, and has broad application prospects.

[0064] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A circuit breaker anti-pumping test circuit, characterized in that: include, On / off circuit (1), fault simulation circuit (2), operation auxiliary assembly (3); The output terminal of the switching circuit (1) is connected to the circuit breaker control closing circuit (12) through the relay module (11); The fault simulation circuit (2) receives the fault signal from the input terminal and feeds it into the protection terminal (21). The operation auxiliary assembly (3) is connected in parallel to the on / off circuit (1).

2. The circuit breaker anti-pumping test circuit according to claim 1, characterized in that: The operation auxiliary assembly (3) includes an adjustment switch (31) and an adjustment plate (32); The input terminal of the regulating switch (31) is connected to the open circuit (1), and the output terminal of the regulating switch (31) is matched with the input terminal of the regulating plate (32); Adjust the output terminal of the pressure plate (32) and connect the disconnect circuit (1) in parallel.

3. The circuit breaker anti-pumping test circuit according to claim 1, characterized in that: The relay module (11) includes a start switch (111), and the other end of the start switch (111) is connected to the circuit breaker control closing circuit (12). The circuit breaker control closing circuit (12) receives the closing command according to the action of the start switch (111).

4. The circuit breaker anti-pumping test circuit according to any one of claims 1 to 3, characterized in that: The fault simulation circuit (2) connects the circuit breaker control closing circuit (12) and the protection terminal (21). A signal input terminal (211) is provided between the protection terminal (21) and the circuit breaker control closing circuit (12); The signal input terminal (211) is located on the fault simulation circuit (2).

5. The circuit breaker anti-pumping test circuit according to claim 4, characterized in that: The fault simulation module (6) is connected to the signal input terminal (211), and a fault simulation signal is input through the signal input terminal (211); The protection terminal (21) reads the fault simulation signal, closes the internal node, and outputs a trip command.

6. The circuit breaker anti-pumping test circuit according to claim 5, characterized in that: The protection terminal (21) is connected to the trip output terminal (212); The trip output terminal (212) is connected to the signal extension circuit (4), and the output terminal of the signal extension circuit (4) is connected to the circuit breaker control circuit (41).

7. The circuit breaker anti-pumping test circuit according to claim 6, characterized in that: The trip command is output through the trip output terminal (212) and enters the signal extension circuit (4); The signal extension circuit (4) output terminal transmits the trip command into the circuit breaker control circuit (41). The circuit breaker control circuit (41) receives the trip command.

8. The circuit breaker anti-pumping test circuit according to claim 7, characterized in that: The output terminals of the circuit breaker control closing circuit (12) and the circuit breaker control opening circuit (41) are connected to the main circuit breaker opening and closing circuit (5). The closing command first enters the main circuit (5) of the circuit breaker through the circuit breaker control closing circuit (12), and the circuit breaker closes; After the tripping command is given, the circuit breaker enters the tripping and closing main circuit (5) through the tripping control circuit (41) and trips; Observe the closing and opening actions of the circuit breaker and test its anti-pumping function.

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