Simulation loop for preventing multiple times of tripping of circuit breaker

Abstract

The utility model relates to the technical field of circuit breaker detection, in particular to an analog loop for preventing a circuit breaker from multiple times of tripping. A safety protection loop, an operation loop, a control loop and an anti-multi-hop loop; the output end of the safety protection loop is connected with the loop relay unit to access the operation loop; the operation loop receives the action signal of the safety protection loop and transmits the action signal to the control loop; the anti-multi-hop loop is connected in parallel with the control loop and simulates the action of the control loop. Through cooperation of the test handle, the tripping monitoring relay, the tripping loop indicating lamp and the reset button, whether the loop indicating lamp is lighted correctly is observed so as to determine correctness of a protection outlet, and the breaker does not need to be actually switched on, thereby reducing action times of the breaker, prolonging service life of the breaker, and being simple and convenient to operate, easy to realize and high in reliability. Operation personnel do not need to repeatedly operate the circuit breaker, the test efficiency is improved, and personnel and equipment safety is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker detection technology, and in particular to a simulation circuit for preventing circuit breakers from tripping and closing repeatedly. Background Technology

[0002] The typical method for circuit breaker operation testing involves closing the circuit breaker and applying a fault value to the protection device using a relay protection tester. The protection device then trips the circuit breaker. Since a single circuit breaker involves many protection tripping outputs, the circuit breaker needs to be closed repeatedly during the operation test to verify the correctness of each protection output tripping the circuit breaker. This results in the circuit breaker tripping and closing multiple times during the entire operation test. Each tripping and closing of the circuit breaker causes a certain amount of wear and corrosion, and excessive tripping and closing will shorten its service life.

[0003] The existing method has the following disadvantages: 1. The circuit breaker trips and closes repeatedly, and each trip and close will cause certain wear and corrosion. Too many trips and closes will shorten its service life; 2. The test efficiency is low. During the test, the operation of the circuit breaker requires the cooperation of the operating personnel, which has problems such as poor personnel cooperation and long waiting time.

[0004] Therefore, a simulation circuit is needed to reduce the number of circuit breaker trips, improve testing efficiency, and ensure the safety of personnel and equipment, thereby preventing repeated tripping and closing of circuit breakers to meet the needs of the current 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 in the aforementioned existing technologies, each tripping and closing of the circuit breaker causes a certain amount of wear and corrosion, excessive tripping and closing will shorten its service life, the testing efficiency is low, and the testing process requires the cooperation of operating personnel to operate the circuit breaker, which has problems such as poor personnel coordination and long waiting time.

[0007] Therefore, the technical problem to be solved by this utility model is to design a simulated circuit that can eliminate the risk of accidental short circuits, improve operational efficiency, and ensure the safety of personnel and equipment to prevent the circuit breaker from tripping and closing repeatedly, so as 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 simulated circuit to prevent circuit breakers from tripping and closing repeatedly, comprising,

[0009] Safety protection circuit, operation circuit, control circuit, and anti-multiple trip circuit;

[0010] The output terminal of the safety protection circuit is connected to the circuit relay unit and then to the operation circuit.

[0011] The operating circuit receives the activation signal from the safety protection circuit and transmits it into the control circuit.

[0012] The anti-multi-hop circuit is connected in parallel to the bus control circuit to simulate the operation of the bus control circuit.

[0013] As an improvement to this utility model

[0014] The anti-multiple-trip circuit includes an operating handle and a monitoring relay unit;

[0015] The input end of the operating handle is connected in parallel to the control circuit, and the output end is connected to the monitoring relay unit.

[0016] As an improvement to this utility model

[0017] A monitoring relay switch is installed in the corresponding monitoring relay unit of the anti-multiple tripping circuit.

[0018] One end of the monitoring relay switch is connected to the circuit indicator unit, and the monitoring relay switch and the circuit indicator unit are connected in parallel to the power supply circuit;

[0019] The monitoring relay switch closes based on the current connected to the monitoring relay unit;

[0020] The circuit indicator unit lights up when the monitoring relay switch is closed.

[0021] As an improvement to this utility model

[0022] The other end of the monitoring relay unit is connected to the reset unit, which is connected in parallel to the power supply circuit;

[0023] The reset unit is activated to reset the monitoring relay unit and the circuit indicator unit, and the next round of simulation is performed.

[0024] As an improvement to this utility model

[0025] The circuit relay unit includes a circuit relay switch, and the other end of the circuit relay switch is connected to the control circuit;

[0026] The control circuit receives corresponding instructions based on the operation of the circuit relay switch.

[0027] As an improvement to this utility model

[0028] The fault simulation module is located between the power supply circuit and the safety protection circuit;

[0029] The fault simulation module is equipped with signal input terminals;

[0030] The other end of the signal input terminal is connected to a safety protection circuit.

[0031] As an improvement to this utility model

[0032] The fault simulation module and the signal input terminals are electrically connected;

[0033] The signal input terminal receives the fault signal transmitted by the fault simulation module and inputs it into the safety protection circuit;

[0034] The safety protection circuit reads the fault signal, closes the internal node, and outputs a trip command.

[0035] As an improvement to this utility model

[0036] One end of the safety protection circuit is equipped with a trip output terminal;

[0037] The other end of the trip output terminal is connected to the circuit relay unit, and the trip command enters the operation circuit through the circuit relay unit;

[0038] After the circuit relay switch is turned on, the tripping command enters the control circuit through the circuit relay switch, controlling the relay to trip.

[0039] The beneficial effects of this utility model are as follows: by using the test handle, trip monitoring relay, trip circuit indicator light, and reset button in combination, the correctness of the protection output can be judged by observing whether the circuit indicator light is lit correctly. There is no need to actually trip or close the circuit breaker, thereby reducing the number of circuit breaker operations and extending its service life. The operation is simple and convenient, easy to implement, and does not require operators to repeatedly operate the circuit breaker, thus improving the testing efficiency and ensuring the safety of personnel and equipment. Attached Figure Description

[0040] 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:

[0041] Figure 1 This is the overall planning diagram of this utility model.

[0042] Figure 2 This is a schematic diagram of the peripheral architecture of the safety protection circuit 1 in this utility model.

[0043] Figure 3 This is a schematic diagram of the cooperative architecture of the control circuit 3 and the anti-multi-hop circuit 4 in this utility model.

[0044] Figure 4 This is a schematic diagram of the internal architecture of the control circuit 3 in this utility model. Detailed Implementation

[0045] 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.

[0046] Example 1

[0047] Reference Figure 1 This embodiment provides a simulated circuit to prevent the circuit breaker from tripping and closing repeatedly.

[0048] Safety protection circuit 1 is used to detect fault signals issued by the protection device and output tripping commands. It includes a corresponding fault signal detection unit, which receives the fault signal and converts it into a tripping command signal to control the tripping operation of the circuit breaker.

[0049] The operating circuit 2 is used to receive the tripping command signal of the safety protection circuit 1 and transmit it to the control circuit 3. The circuit relay unit 11 is used to receive the signal of the safety protection circuit 1 and transmit it to the control circuit 3 after amplification or conversion.

[0050] The control circuit 3 is used to receive the trip command signal from the operation circuit 2 and control the tripping and closing of the circuit breaker. The control circuit 3 includes the tripping coil and closing coil of the circuit breaker, as well as related control circuits.

[0051] The anti-multiple tripping circuit 4 is connected in parallel with the control circuit 3 to replace the control circuit 3, directly reflect the action of the safety protection circuit 1, and prevent the circuit breaker from tripping and closing multiple times, which would reduce its durability.

[0052] When conducting circuit breaker operation tests, the fault signal is first detected through the safety protection circuit 1. When the fault signal is detected, the safety protection circuit 1 outputs a trip command signal, which is transmitted to the control circuit 3 through the operation circuit 2. The control circuit 3 receives the trip command signal and controls the circuit breaker to trip.

[0053] After confirming that the circuit breaker has tripped correctly, operate the anti-multiple trip circuit 4, and then simulate the tripping of other protection output circuit breakers in sequence. By observing whether the circuit indicator lights are lit correctly, you can judge the correctness of the protection outputs in the remaining safety protection circuits 1. After all tests are completed, exit the anti-multiple trip circuit 4.

[0054] Example 2

[0055] Reference Figures 1-3 This embodiment is based on the previous embodiment, and differs from the previous embodiment in that:

[0056] One end of the operating handle 41 is connected in parallel to the control circuit 3, and the other end is connected to the monitoring relay unit 42. When the operating handle is in the "closed" position, the electrical signal is allowed to pass through; when the operating handle is in the "open" position, the corresponding electrical signal is cut off.

[0057] The output of the operating handle 41 is also connected to the monitoring relay unit 42, which corresponds to the monitoring relay switch 43. When the electrical signal is connected to the monitoring relay unit 42 through the operating handle 41, the monitoring relay unit 42 will control the monitoring relay switch 43 to be connected synchronously.

[0058] The monitoring relay switch 43 and the circuit indicator unit 431 are connected in parallel to the power supply circuit. When the monitoring relay switch 43 is closed, the circuit indicator unit 431 lights up, indicating that the anti-multiple-trip circuit 4 is working, demonstrating that the protection output of the safety protection circuit 1 is functioning normally. The safety protection circuit 1 has more than one protection output; after one round of operation of the anti-multiple-trip circuit 4, it needs to be reset for subsequent simulations.

[0059] The reset unit 44 is used to reset the monitoring relay unit 42 and the loop indicator unit 431. When the reset unit 44 is activated, the monitoring relay unit 42 and the loop indicator unit 431 are reset to prepare for the next round of simulation. When multiple protection outputs need to be tested, the above steps can be repeated. After all tests are completed, the operating handle 41 is placed in the "disconnect" position to end the test.

[0060] By using the operation procedure of the anti-multiple tripping circuit 4, it can replace the operation of the control circuit 3, avoid the actual tripping and closing of the circuit breaker, thereby reducing the number of circuit breaker operations and extending its service life.

[0061] Example 3

[0062] Reference Figures 1-4 This embodiment is based on the previous embodiment, and differs from the previous embodiment in that:

[0063] The circuit relay unit 11 includes a circuit relay switch 111, the other end of which is connected to the control circuit 3. The control circuit 3 receives corresponding commands based on the operation of the circuit relay switch 111 and controls the tripping operation of the circuit breaker.

[0064] The fault simulation module 5 is located between the power supply circuit and the safety protection circuit 1 to simulate fault signals. The fault simulation module 5 is equipped with a signal input terminal 51 to receive externally input fault signals. The other end of the signal input terminal 51 is connected to the safety protection circuit 1. The signal input terminal 51 receives the fault signals transmitted by the fault simulation module 5 and inputs them into the safety protection circuit 1.

[0065] Safety protection circuit 1 reads fault signals, closes its internal nodes, and outputs a tripping command. One end of safety protection circuit 1 is equipped with a tripping output terminal 6, and the other end of tripping output terminal 6 is connected to circuit relay unit 11. The tripping command enters operation circuit 2 through circuit relay unit 11. When circuit relay switch 111 is turned on, the tripping command enters control circuit 3 through circuit relay switch 111, controlling the relay to trip.

[0066] This embodiment details the components and working principle of the simulation circuit for preventing repeated tripping and closing of a circuit breaker, 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 tripping circuit 5, this invention can efficiently and safely simulate and test the anti-tripping function of a circuit breaker, providing strong support for the stable operation of the power system. This technical solution not only improves the efficiency and safety of testing but also reduces operation and maintenance costs, and has broad application prospects.

[0067] 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. An analog circuit for preventing multiple tripping of a circuit breaker, comprising: The simulation circuit comprises a safety protection circuit (1), an operation circuit (2), a control circuit (3) and a multiple-jump prevention circuit (4). The output end of the safety protection circuit (1) is connected to the circuit relay unit (11) and is connected to the operation circuit (2). The operation circuit (2) receives the action signal of the safety protection circuit (1) and transmits it to the control circuit (3). The multiple-jump prevention circuit (4) is connected in parallel to the control circuit (3) and simulates the action of the control circuit (3).

2. The simulation circuit according to claim 1, wherein: The multiple-jump prevention circuit (4) comprises an operation handle (41) and a monitoring relay unit (42). The input end of the operation handle (41) is connected in parallel to the control circuit (3), and the output end is connected to the monitoring relay unit (42).

3. The simulation circuit according to claim 1, wherein: The monitoring relay unit (42) is provided with a monitoring relay switch (43) in the multiple-jump prevention circuit (4). One end of the monitoring relay switch (43) is connected to the circuit indication unit (431), and the monitoring relay switch (43) and the circuit indication unit (431) are connected in parallel to the power circuit. The monitoring relay switch (43) is closed according to the current connection of the monitoring relay unit (42). The circuit indication unit (431) is lit according to the closing of the monitoring relay switch (43).

4. The simulation circuit according to any one of claims 1-3, wherein: The other end of the monitoring relay unit (42) is connected to the reset unit (44), and the reset unit (44) is connected in parallel to the power circuit. Starting the reset unit (44) resets the monitoring relay unit (42) and the circuit indication unit (431), and the next round of simulation is performed.

5. The simulation circuit according to claim 4, wherein: The circuit relay unit (11) comprises a circuit relay switch (111), and the other end of the circuit relay switch (111) is connected to the control circuit (3). The control circuit (3) receives the corresponding instruction according to the action of the circuit relay switch (111).

6. The simulation circuit according to claim 5, wherein: The fault simulation module (5) is arranged between the power circuit and the safety protection circuit (1). The signal input terminal (51) is arranged on the fault simulation module (5). The other end of the signal input terminal (51) is connected to the safety protection circuit (1).

7. The simulation circuit according to claim 6, wherein: The fault simulation module (5) and the signal input terminal (51) are electrically connected. The signal input terminal (51) receives the fault signal transmitted by the fault simulation module (5) and introduces it into the safety protection circuit (1). The safety protection circuit (1) reads the fault signal, the internal node is closed, and the output tripping command is output.

8. The simulation circuit according to claim 7, wherein: One end of the safety protection circuit (1) is provided with a tripping output terminal (6). ​ The other end of the opening output terminal (6) is connected to the loop relay unit (11), and the opening command enters the operation loop (2) through the loop relay unit (11); After the loop relay switch (111) is connected, the opening command enters the control loop (3) through the loop relay switch (111), and the relay is opened.

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