A circuit breaker control circuit and a circuit breaker anti-trip module

Abstract

The present invention provides a circuit breaker control circuit and a circuit breaker anti-trip module, which belong to the technical field of high-voltage electrical appliances. The circuit breaker anti-trip module includes a current type relay and two voltage type relays; the coil of the current type relay is connected in series with the first normally closed contact of the first voltage type relay, and then connected in series in the circuit breaker closing circuit; the branch formed by the coil of the current type relay, the first normally closed contact of the first voltage type relay, the circuit breaker contact and the closing coil is used as the first branch; the normally open contact of the current type relay is connected in series with the coil of the second voltage type relay and then connected in parallel with the first branch; the normally open contact of the second voltage type relay is connected in parallel with the normally open contact of the current type relay; the normally closed contact of the current type relay is connected in series with the coil of the first voltage type relay and then connected in parallel with the coil of the second voltage type relay. The circuit breaker anti-trip module uses a current type relay to start the anti-trip relay, which effectively solves the problem of failure of the anti-trip circuit to start.

Description

Technical Field

[0001] The invention relates to a circuit breaker control loop and a circuit breaker anti-tripping module, belonging to the technical field of high-voltage electrical appliances. Background Art

[0002] High-voltage circuit breakers play a vital role in the operation of the entire power grid. They can effectively cut off faults such as grounding and phase-to-phase short circuits to ensure safe and reliable operation of the line. During the circuit breaker closing operation, if the line is in a faulty state, the protection will issue an opening command, and the circuit breaker will perform the opening operation. At this time, the closing command has not been removed or the closing output circuit is stuck. After the circuit breaker completes the opening, because the closing circuit command still exists or the closing output circuit is stuck and still energized, the relay will perform the closing operation again. Because it is closed to a fault, the protection opening command is still there, and the circuit breaker will perform the opening operation again. The circuit breaker mechanism auxiliary switch contact conversion time is as follows: Figure 1 As shown in the figure, the closing and opening time of the auxiliary switch of the circuit breaker mechanism is 56 to 60ms. The repeated opening and closing action of the circuit breaker is called the circuit breaker "jumping", which will cause the circuit breaker to burn or explode due to continuous interruption of short-circuit current in a short period of time, causing the accident to expand.

[0003] In order to avoid the above problems, an anti-trip circuit is currently designed in the circuit breaker control circuit. The schematic diagram of the existing anti-trip circuit is as follows: Figure 4 As shown, a single voltage type relay is used as the anti-tripping relay KV. The anti-tripping relay KV cooperates with the normally open auxiliary contacts 41 and 43 of the circuit breaker QF1 to form an anti-tripping circuit. The working principle of the anti-tripping circuit is as follows: after the closing switch is turned on and before the circuit breaker QF1 is closed, the circuit breaker closing circuit is in a conducting state. At this time, the normally open auxiliary contacts 41 and 43 of the circuit breaker QF1 are closed. If the closing and opening conversion time of the normally open auxiliary contacts 41 and 43 of QF1 is greater than the closing time of the anti-tripping relay KV, the anti-tripping relay is successfully started, so that the coil of the anti-tripping relay KV is energized, and then the normally open auxiliary contacts 13 and 14 of the anti-tripping relay KV are closed, and the coil of the anti-tripping relay KV forms a self-holding circuit. At the same time, the normally closed auxiliary contacts 21 and 22 of the anti-tripping relay KV are disconnected, so that the circuit breaker closing circuit is disconnected, and the anti-tripping circuit takes effect. At this time, even if the protection device remotely controls the circuit breaker to open before the closing command is released, since the anti-tripping relay has been started and the closing command has not been released, the coil of the anti-tripping relay KV will always be energized, so that the normally closed auxiliary contacts 21 and 22 of the anti-tripping relay KV will always disconnect the circuit breaker closing circuit. After the circuit breaker is opened, it will not be closed again, thereby preventing the circuit breaker from "jumping".

[0004] However, since the anti-trip relay KV uses a voltage type relay, compared with the current type relay, the voltage type relay requires a larger starting pulse and a longer starting time, such as Figure 2 As shown, the closing time at the rated voltage given in the parameters of the voltage-type relay 1 is no more than 50ms. However, due to the dispersion of the actual closing time of the anti-trip relay, the time may deviate, so that the product's own anti-trip circuit may work in a critical state, making the circuit breaker operation in an unsafe state. If the closing and opening conversion time of the normally open auxiliary contacts 41, 43 of the circuit breaker QF1 is less than the closing time of the anti-trip relay KV, the anti-trip relay cannot be started, and the anti-trip circuit will fail, unable to play the role of preventing the circuit breaker from "jumping". Therefore, the key to starting the existing anti-trip circuit is that the closing and opening conversion time of the normally open auxiliary contacts 41, 43 of the circuit breaker QF1 must be greater than the closing time of the anti-trip relay KV. Although the closing time of the voltage-type relay can be made as short as possible through device selection, such as Figure 3 As shown in the figure, the closing time under the rated voltage given in the parameters of the voltage type relay 1 is not more than 20ms. Although the parameters meet the design requirements of the circuit breaker anti-tripping circuit, the actual closing time of the anti-tripping relay is dispersed and the time may be deviated due to the operation conditions of the power grid. Even if it is replaced with a relay with a short closing time, there is a situation where the closing time of the normally open auxiliary contacts 41, 43 of the circuit breaker QF1 is less than the closing time of the anti-tripping relay KV, and then there is a risk of failure of the anti-tripping circuit; in addition, line faults may also cause the closing time of the normally open auxiliary contacts 41, 43 of the circuit breaker QF1 to be shorter, resulting in the circuit breaker QF1 opening again when the anti-tripping relay KV has not been started. At this time, the circuit breaker will close because the closing command of the circuit breaker has not been released. Later, the circuit breaker will open again because the fault still exists. During this period, the anti-tripping relay KV is not started, and the anti-tripping circuit does not work. The circuit breaker will still "jump" and cause serious power failure.

[0005] In addition, a trip monitoring circuit is currently designed in the circuit breaker control circuit, such as Figure 1 As shown, the existing circuit breaker trip monitoring circuit needs to be connected in series with the normally closed auxiliary contacts 74, 76 of the circuit breaker QF1 to realize it. When the closing and opening conversion time of the normally open auxiliary contacts 41, 43 of the circuit breaker QF1 is less than the closing time of the anti-tripping relay KV, the circuit breaker has actually been closed, while the normally closed auxiliary contacts 31, 32 of the anti-tripping relay KV have not yet been actuated. The original closing monitoring circuit is changed into an anti-tripping monitoring circuit, resulting in the opening indication device not being actuated and still displaying the opening state, which will mislead the circuit breaker background monitoring system and cause hidden dangers in power operation.

[0006] In summary, the existing circuit breaker control circuit has the following problems: (1) The startup of the existing circuit breaker anti-tripping circuit depends on the coordination of the closing and opening conversion time of the circuit breaker auxiliary contacts and the closing time of the anti-tripping relay. When the closing and opening conversion time of the circuit breaker auxiliary contacts is less than the closing time of the anti-tripping relay, the anti-tripping relay cannot be started, resulting in failure of the anti-tripping circuit; (2) The implementation of the existing circuit breaker tripping monitoring circuit requires the help of the circuit breaker auxiliary contacts, which has more wiring and a higher error rate. Summary of the invention

[0007] The object of the present invention is to provide a circuit breaker control circuit and a circuit breaker anti-tripping module, which can effectively solve the problem of failure of the existing anti-tripping circuit.

[0008] In order to achieve the above-mentioned object, the present invention provides a circuit breaker control circuit, including a circuit breaker anti-tripping module and a circuit breaker closing circuit, wherein the circuit breaker closing circuit includes a closing switch, a circuit breaker contact and a closing coil connected in series in sequence, and the circuit breaker anti-tripping module includes a current type relay and two voltage type relays; wherein,

[0009] The coil of the current-source relay is connected in series with the first normally closed contact of the first voltage-source relay and then connected in series in the circuit breaker closing circuit; a branch formed by the coil of the current-source relay, the first normally closed contact of the first voltage-source relay, the circuit breaker contact and the closing coil is used as a first branch;

[0010] The normally open contact of the current-type relay is connected in series with the coil of the second voltage-type relay and then connected in parallel with the first branch;

[0011] The normally open contact of the second voltage type relay is connected in parallel with the normally open contact of the current type relay;

[0012] The normally closed contact of the current-type relay is connected in series with the coil of the first voltage-type relay, and then connected in parallel with the coil of the second voltage-type relay.

[0013] The beneficial effects of the circuit breaker control circuit are as follows: the circuit breaker anti-tripping module of the circuit breaker control circuit adopts voltage-type and current-type relays to cooperate closely, and the current-type relay is connected in series in the circuit breaker closing circuit as a starting relay, with a short action time and rapid response to start; the first voltage-type relay is used as an anti-tripping relay, and the second voltage-type relay is used as a self-holding relay, wherein when the current-type relay is energized, the self-holding relay is quickly started, and then the current-type relay is de-energized, the anti-tripping relay is quickly started, and the circuit breaker anti-tripping module plays a role in protecting the circuit breaker; that is, the circuit breaker anti-tripping module adopts the current-type relay to start the anti-tripping relay, replacing the original circuit breaker auxiliary contact start, so that the start of the anti-tripping relay is not limited by the action time of the circuit breaker auxiliary contact, and overcomes the problem that the anti-tripping relay cannot be started due to insufficient closing and opening time of the circuit breaker auxiliary contact, thereby effectively solving the problem of failure of the anti-tripping circuit to start, avoiding the occurrence of power accidents, and improving the power supply reliability level; and the electrical wiring is simple, the action is reliable, the circuit breaker control circuit is optimized, and the stability of the circuit breaker operation is significantly improved.

[0014] Furthermore, in the above circuit breaker control circuit, the circuit breaker anti-tripping module further includes two diodes, which are connected in series and in parallel with the coil of the current-type relay.

[0015] The beneficial effect of doing so is that the two diodes can stabilize the voltage on both sides of the current-type relay, thereby stabilizing the operating current of the current-type relay.

[0016] Furthermore, in the above-mentioned circuit breaker control circuit, the first voltage-type relay further includes a second normally closed contact, and the second normally closed contact of the first voltage-type relay is used to be connected in series in the circuit breaker trip monitoring circuit.

[0017] The beneficial effect of doing so is: by connecting the normally closed contacts of the anti-trip relay (i.e., the first voltage type relay) in series in the trip monitoring circuit to realize the trip monitoring function, the trip monitoring circuit does not need to rely on the circuit breaker auxiliary contacts, which can reduce electrical connections and improve the circuit breaker control reliability.

[0018] The present invention also provides a relay anti-tripping module, wherein the circuit breaker anti-tripping module comprises a current type relay and two voltage type relays; wherein,

[0019] After the coil of the current-type relay is connected in series with the first normally closed contact of the first voltage-type relay, it is used to be connected in series in a circuit breaker closing circuit; the circuit breaker closing circuit comprises a closing switch, a circuit breaker contact and a closing coil connected in series in sequence, and a branch formed by the coil of the current-type relay, the first normally closed contact of the first voltage-type relay, the circuit breaker contact and the closing coil is used as a first branch;

[0020] The normally open contact of the current-type relay is connected in series with the coil of the second voltage-type relay and then connected in parallel with the first branch;

[0021] The normally open contact of the second voltage type relay is connected in parallel with the normally open contact of the current type relay;

[0022] The normally closed contact of the current-type relay is connected in series with the coil of the first voltage-type relay, and then connected in parallel with the coil of the second voltage-type relay.

[0023] The beneficial effects of the relay anti-tripping module are as follows: the current type relay is used as the starting relay, the first voltage type relay is used as the anti-tripping relay, and the second voltage type relay is used as the self-holding relay, wherein when the current type relay is energized, the self-holding relay starts quickly, and then the current type relay is de-energized, the anti-tripping relay starts quickly, and the circuit breaker anti-tripping module plays a role in protecting the circuit breaker; the relay anti-tripping module uses the current type relay to start the anti-tripping relay (i.e., the first voltage type relay) to replace the original circuit breaker auxiliary contact starting, so that the starting of the anti-tripping relay is not limited by the action time of the circuit breaker auxiliary contact, and overcomes the problem that the anti-tripping relay cannot be started due to insufficient closing and opening time of the circuit breaker auxiliary contact, thereby effectively solving the problem of starting failure of the anti-tripping circuit, avoiding the occurrence of power accidents, and improving the power supply reliability level; in addition, the electrical wiring is simple, the action is reliable, the circuit breaker control circuit is optimized, and the stability of circuit breaker operation is significantly improved.

[0024] Furthermore, in the above-mentioned circuit breaker anti-tripping module, the circuit breaker anti-tripping module also includes two diodes, which are connected in series and in parallel with the coil of the current-type relay.

[0025] The beneficial effect of doing so is that the two diodes can stabilize the voltage on both sides of the current-type relay, thereby stabilizing the operating current of the current-type relay.

[0026] Furthermore, in the above-mentioned circuit breaker anti-tripping module, the first voltage-type relay further includes a second normally closed contact, and the second normally closed contact of the first voltage-type relay is used to be connected in series in the circuit breaker tripping monitoring circuit.

[0027] The beneficial effect of doing so is: by connecting the normally closed contacts of the anti-trip relay (i.e., the first voltage type relay) in series in the trip monitoring circuit to realize the trip monitoring function, the trip monitoring circuit does not need to rely on the circuit breaker auxiliary contacts, which can reduce electrical connections and improve the circuit breaker control reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the switching time of the auxiliary switch contacts of the circuit breaker mechanism;

[0029] Figure 2This is a schematic diagram of the first closing time of an existing anti-trip relay;

[0030] Figure 3 This is a schematic diagram of the second closing time of the existing anti-trip relay;

[0031] Figure 4 It is a schematic diagram of a circuit breaker control circuit in the prior art;

[0032] Figure 5 Schematic diagram of a circuit breaker control circuit in an embodiment of the circuit breaker control circuit of the present invention. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0034] Circuit breaker control circuit implementation example:

[0035] like Figure 5 As shown, the circuit breaker control circuit of this embodiment includes a circuit breaker anti-trip module and a circuit breaker closing circuit, wherein the circuit breaker closing circuit includes closing switches (such as Figure 5 As shown, the closing switch includes a local control closing switch and a remote control closing switch. In actual work, the closing switch here is determined to be a local control closing switch or a remote control closing switch according to who issues the closing command), circuit breaker contacts (including normally closed contacts 54, 56 of circuit breaker QF1 and normally closed contacts 66, 68 of circuit breaker QF1) and closing coil YC1.

[0036] The circuit breaker anti-tripping module of this embodiment includes a current type relay and two voltage type relays. KA is used to represent the current type relay, KV is used to represent the first voltage type relay, and KV1 is used to represent the second voltage type relay.

[0037] Depend on Figure 5 It can be seen that the coil A1-A2 of KA is connected in series with the first normally closed contacts 21, 22 of KV and then connected in series in the circuit breaker closing circuit. In this embodiment, the series connection position of the KA coil and the first normally closed contact of KV is between the closing switch and the circuit breaker contact. As other implementation methods, the series connection position can be adjusted according to actual needs. For example, the series connection position can also be between the circuit breaker contact and the closing coil.

[0038] For the sake of simplicity, the branch formed by KA's coil A1-A2, KV's first normally closed contacts 21, 22, circuit breaker contacts and closing coil YC1 is referred to as the first branch; KA's normally open contacts 13, 14 are connected in series with KV1's coil A1-A2 and then connected in parallel with the first branch; KV1's normally open contacts 13, 14 are connected in parallel with KA's normally open contacts 13, 14; KA's normally closed contacts 21, 22 are connected in series with KV's coil A1-A2 and then connected in parallel with KV1's coil A1-A2.

[0039] The working principle of the circuit breaker anti-tripping module of this embodiment is as follows:

[0040] (1) After the closing switch is turned on and before the circuit breaker QF1 is closed:

[0041] The circuit breaker closing circuit is in the on state, the coil A1-A2 of the current type relay KA is energized, and then the normally open contacts 13 and 14 of KA are closed, and the normally closed contacts 21 and 22 of KA are opened, so that the coil A1-A2 of the second voltage type relay KV1 is energized, and then the normally open contacts 13 and 14 of KV1 are closed, and the coil of KV1 is self-holding.

[0042] At this time, the coil of the current-source relay KA is energized, so that the coil of the first voltage-source relay KV is in a ready state.

[0043] (2) After the circuit breaker QF1 is closed:

[0044] The normally closed contacts 54 and 56 of the circuit breaker QF1 are disconnected, causing the circuit breaker closing circuit to be de-energized, the coil of the current type relay KA to lose power, the normally open contacts 13 and 14 of KA to be disconnected, and the normally closed contacts 21 and 22 to be closed. Since the closing command has not been released at this time, the closing switch is still turned on, and the coil of KV1 is self-holding so that the normally open contacts 13 and 14 of KV1 are still in a closed state. At the same time, the normally closed contacts 21 and 22 of KA are closed, thereby energizing the coil of the first voltage type relay KV, and the first voltage type relay KV works, and the normally closed contacts 21 and 22 of KV are disconnected, thereby disconnecting the circuit breaker closing circuit.

[0045] If a fault occurs in the line and the protection device remotely controls the circuit breaker to open before the closing command is released, 54 and 56 of the circuit breaker QF1 will be closed again. If there is no anti-tripping device, the closing circuit of the circuit breaker will be in a conducting state at this time, and the circuit breaker will be repeatedly opened and closed. However, with the anti-tripping module of the circuit breaker of this embodiment, the circuit breaker will not be closed again after opening, because before the closing command is released, the coil of the first voltage-type relay KV of this embodiment will be energized, so that the normally closed contacts 21 and 22 of KV will always disconnect the closing circuit of the circuit breaker. At this time, the closing pulse (about 150ms) will be released through the circuit composed of the normally open contacts 13 and 14 of KV1, the coil of KV1, the normally closed contacts 21 and 22 of KA, and the coil of KV until the closing command is released.

[0046] That is to say, in this embodiment, the current type relay KA is used to start the first voltage type relay KV. When KA is powered on, KV is ready, and when KA is powered off, KV starts working. It does not rely on the auxiliary contacts of the circuit breaker, can shorten the starting time of the anti-tripping circuit, and ensure stable operation of the switch.

[0047] Depend on Figure 5 It can be seen that the circuit breaker anti-tripping module of this embodiment also includes two diodes, which are connected in series and in parallel with the coils A1-A2 of the current type relay KA; the function of these two diodes is to stabilize the working current of KA by stabilizing the voltage on both sides of KA; as other implementation methods, in actual applications, the number of diodes used can be determined according to the actual working current of the current type relay.

[0048] Depend on Figure 5 It can also be seen that the first voltage type relay KV of the present embodiment further includes second normally closed contacts 31, 32. The second normally closed contacts 31, 32 of the first voltage type relay KV are used to be connected in series in the circuit breaker trip monitoring circuit. By connecting the normally closed contacts 31, 32 of KV in series in the circuit breaker trip monitoring circuit, the operating state of the switch can be accurately captured without relying on the circuit breaker auxiliary contacts.

[0049] The trip monitoring circuit is connected in series with the auxiliary contacts 31 and 32 of KV, which can accurately capture the operating status of the switch. It does not rely on the auxiliary contacts of the circuit breaker mechanism to start. As long as the switch is closed, the contacts 31 and 32 of KV can be operated in time, the trip monitoring is disconnected, and the closing is displayed. If the auxiliary contact QF1 of the circuit breaker is still relied on to start KV at this time, when the closing and opening time of the circuit breaker auxiliary switch QF1 is less than the operating time of the anti-trip relay KV, the circuit breaker has actually been closed, and the auxiliary contacts 31 and 32 of the anti-trip relay KV have not been operated, and the original monitoring closing circuit has been changed to a monitoring anti-trip circuit, resulting in the opening indication device not being operated and still displaying the opening state, thereby misleading the circuit breaker background monitoring system and causing hidden dangers in power operation.

[0050] As another implementation method, the circuit breaker anti-tripping module of this embodiment can adopt a modular design. The module adopts an external interface, including a positive input terminal, a negative terminal, a series interface of the closing circuit, and a series interface of the tripping monitoring circuit. The internal relays are integrated and solidified, which can improve the reliability and assembly efficiency of the switch operation and save installation space.

[0051] In summary, the circuit breaker control circuit of this embodiment has the following advantages:

[0052] 1) The circuit breaker anti-tripping module uses voltage-type and current-type relays to work closely together. The current-type relay is connected in series in the circuit breaker closing circuit as a starting relay. The voltage of the current-type relay is clamped by a diode to make it adapt to the change of the current in the closing circuit. The action time is short and it can respond quickly to the start. The first voltage-type relay is used as an anti-tripping relay and the second voltage-type relay is used as a self-holding relay. The self-holding relay is started within 3 milliseconds by the power-on of the current-type relay. After that, the current-type relay is powered off, and the anti-tripping relay is quickly started. The anti-tripping module plays a role in protecting the circuit breaker.

[0053] Since the present embodiment adopts a current type relay to start the anti-trip relay, replacing the original auxiliary contact of the circuit breaker, the start of the anti-trip relay is not limited by the action time of the auxiliary contact of the circuit breaker, and overcomes the problem that the anti-trip relay cannot be started due to insufficient closing and opening time of the auxiliary contact of the circuit breaker, thereby effectively solving the problem of failure of the anti-trip circuit to start, avoiding the occurrence of power accidents and improving the power supply reliability level; in addition, the electrical wiring is simple, the action is reliable, the circuit breaker control circuit is optimized, and the stability of the circuit breaker operation is significantly improved;

[0054] 2) The circuit breaker anti-tripping module connects the normally closed contact of the anti-tripping relay in series with the tripping monitoring circuit to realize the tripping monitoring function, so that the tripping monitoring circuit does not need to rely on the auxiliary contacts of the circuit breaker, which can reduce electrical connections and improve the reliability of circuit breaker control;

[0055] 3) The modular design solves the problem of short life of secondary components and inconsistency with the switch body, improves the overall operating life of the switch, and facilitates installation and maintenance, avoiding electromagnetic resonance, cumbersome installation and other problems;

[0056] 4) It involves the integrated design of voltage type relays, current type relays, etc. with the circuit breaker control circuit. The circuit breaker anti-tripping module is installed in the circuit breaker control cabinet. Based on the direct electrical connection and efficient cooperation of each relay, the circuit breaker anti-tripping and tripping position monitoring functions are completed;

[0057] 5) The portable installation method makes the circuit breaker anti-trip module easy to install and takes up less space, shortens the installation time, reduces the manufacturing cost, and solves the problems of multiple wiring of the original anti-trip relay contacts and large space occupation;

[0058] 6) Realize the integrated and modular design of the circuit breaker anti-tripping module, reduce the failure rate of components, reduce product maintenance costs, enhance market competitiveness, improve the reliability of switch operation, and improve the reliability of power grid operation.

[0059] Circuit breaker anti-trip module embodiment:

[0060] The circuit breaker anti-tripping module of this embodiment is the same as the circuit breaker anti-tripping module in the circuit breaker control circuit embodiment, and will not be described in detail here.

Claims

1. A circuit breaker control circuit, comprising a circuit breaker anti-tripping module and a circuit breaker closing circuit, wherein the circuit breaker closing circuit comprises a closing switch, a circuit breaker contact and a closing coil connected in series in sequence, characterized in that: The circuit breaker anti-tripping module includes a current type relay and two voltage type relays; wherein, The coil of the current-source relay is connected in series with the first normally closed contact of the first voltage-source relay and then connected in series in the circuit breaker closing circuit; a branch formed by the coil of the current-source relay, the first normally closed contact of the first voltage-source relay, the circuit breaker contact and the closing coil is used as a first branch; The normally open contact of the current-type relay is connected in series with the coil of the second voltage-type relay and then connected in parallel with the first branch; The normally open contact of the second voltage type relay is connected in parallel with the normally open contact of the current type relay; The normally closed contact of the current-type relay is connected in series with the coil of the first voltage-type relay, and then connected in parallel with the coil of the second voltage-type relay.

2. The circuit breaker control circuit according to claim 1, characterized in that: The circuit breaker anti-tripping module also includes two diodes, which are connected in series and in parallel with the coil of the current-type relay.

3. The circuit breaker control circuit according to claim 2, characterized in that: The first voltage-type relay also includes a second normally closed contact, and the second normally closed contact of the first voltage-type relay is used to be connected in series in a circuit breaker trip monitoring circuit.

4. A circuit breaker anti-tripping module, characterized in that: The circuit breaker anti-tripping module includes a current type relay and two voltage type relays; wherein, After the coil of the current-type relay is connected in series with the first normally closed contact of the first voltage-type relay, it is used to be connected in series in a circuit breaker closing circuit; the circuit breaker closing circuit comprises a closing switch, a circuit breaker contact and a closing coil connected in series in sequence, and a branch formed by the coil of the current-type relay, the first normally closed contact of the first voltage-type relay, the circuit breaker contact and the closing coil is used as a first branch; The normally open contact of the current-type relay is connected in series with the coil of the second voltage-type relay and then connected in parallel with the first branch; The normally open contact of the second voltage type relay is connected in parallel with the normally open contact of the current type relay; The normally closed contact of the current-type relay is connected in series with the coil of the first voltage-type relay, and then connected in parallel with the coil of the second voltage-type relay.

5. The circuit breaker anti-tripping module according to claim 4, characterized in that: The circuit breaker anti-tripping module also includes two diodes, which are connected in series and in parallel with the coil of the current-type relay.

6. The circuit breaker anti-tripping module according to claim 5, characterized in that: The first voltage-type relay also includes a second normally closed contact, and the second normally closed contact of the first voltage-type relay is used to be connected in series in a circuit breaker trip monitoring circuit.

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