A multifunctional analog circuit breaker based on wireless communication and its control method

Abstract

This invention relates to a multifunctional analog circuit breaker based on wireless communication. This analog circuit breaker achieves wireless control between protection devices and the analog circuit breaker through wireless communication technology, solving the problems of high cable consumption and short circuits caused by reduced cable insulation in traditional analog circuit breakers. By employing a detachable wireless slave device, different protection devices can control the tripping and closing of the same analog circuit breaker, overcoming the limitation of one-to-one control in traditional analog circuit breakers. This significantly reduces the number of analog circuit breakers required for training labs and improves compatibility with future expansion of protection devices, benefiting the long-term planning of training labs. This invention also fully realizes the functions of a field circuit breaker, including normal tripping and closing and anti-pumping functions, effectively ensuring the reliability and safety of circuit breaker operation.

Description

Technical Field

[0001] This invention relates to the field of relay protection technology, and more specifically to a multifunctional analog circuit breaker based on wireless communication. Background Technology

[0002] Currently, the simulated circuit breakers used in the State Grid's relay protection training rooms are all connected to the protection devices point-to-point via cables to achieve the purpose of controlling the simulated circuit breakers. This method can only achieve one-to-one control of a single protection device and simulated circuit breaker, resulting in low circuit breaker utilization and inconvenience for the expansion of the training rooms, which is detrimental to the long-term planning of the training rooms. In addition, the traditional control method requires cables to be run from the positive and negative DC power supplies and trip / close commands of each protection device to the simulated circuit breaker cabinet. This not only consumes a large amount of cable but also frequently leads to short circuits due to reduced cable insulation, thus affecting the reliability and safety of equipment operation. At the same time, traditional simulated circuit breakers can only perform simple opening and closing functions and do not truly simulate the functions of actual circuit breakers in the field, such as anti-pumping functions. Summary of the Invention

[0003] The purpose of this invention is to provide a multifunctional analog circuit breaker based on wireless communication, which has rich functions, high compatibility and high reliability.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is: a multi-functional analog circuit breaker based on wireless communication, comprising a wireless analog circuit breaker and a wireless slave device. The wireless analog circuit breaker is equipped with a DL segmented transmitter slave node, a DL closed transmitter slave node, an HQ receiver slave closing node, and a TQ receiver slave tripping node. The wireless slave device is equipped with a DL segmented receiver circuit breaker node, a DL closed receiver circuit breaker node, an HQ transmitter circuit breaker closing node, a TQ transmitter circuit breaker tripping node, a closing relay HQ, and a tripping relay TQ. The DL receiving circuit breaker node and the closing relay HQ are connected to the closing circuit of the protection device, and the DL closing circuit breaker node and the tripping relay TQ are connected to the tripping circuit of the protection device. The wireless analog circuit breaker communicates wirelessly with the wireless slave device to synchronize the opening and closing states of the DL receiving circuit breaker node, the DL closing circuit breaker node, the HQ receiving slave closing node, the HQ transmitting circuit breaker closing node, and the TQ receiving slave tripping node with the TQ transmitting circuit breaker tripping node.

[0005] Furthermore, the wireless analog circuit breaker includes an anti-pumping relay K0, a tripping / closing holding relay KA, a position relay DL, and tripping / closing indicator lights. The +110V DC positive terminal is connected to the closing circuit via the local closing button and the HQ receiver slave closing node. The closing circuit is divided into two paths: one path connects to the coil of the tripping / closing holding relay KA via the normally closed node of the anti-pumping relay K0 and the first normally closed node of the position relay DL; the other path connects to the coil of the anti-pumping relay K0 via a parallel circuit of the normally open node of the anti-pumping relay K0 and the first normally open node of the position relay DL. The +110V DC positive terminal is connected to the coil of the anti-pumping relay K0 via the local tripping button and the TQ receiver slave tripping / closing node. The gate node is connected to the tripping circuit, and the tripping circuit is connected to the coil of the tripping and closing holding relay KA via the second normally open node of the position relay DL. The coils of the tripping and closing holding relay KA and the anti-pumping relay K0 are both connected to the negative terminal of -110V DC. The positive terminal of +110V DC is connected to the negative terminal of -110V DC via the normally open node of the tripping and closing holding relay KA and the coil of the position relay DL. The positive terminal of +110V DC is connected to the negative terminal of -110V DC via the third normally open node of the position relay DL and the closing indicator light. The positive terminal of +110V DC is connected to the negative terminal of -110V DC via the second normally closed node of the position relay DL and the opening indicator light.

[0006] Furthermore, the circuit breaker holding relay KA has two states: active and reset. When active, it indicates that the circuit breaker is closed; when reset, it indicates that the circuit breaker is open.

[0007] This invention also provides a control method for the aforementioned multifunctional analog circuit breaker based on wireless communication. When the analog circuit breaker is in the open position, the DL open position transmitter slave node of the wireless analog circuit breaker closes and the DL close position transmitter slave node opens, while simultaneously sending the corresponding opening and closing signals to the wireless slave. The DL open position receiver circuit breaker node of the wireless slave closes and the DL close position receiver circuit breaker node opens. When the protection device issues a closing command, the closing relay HQ is energized and operates, its corresponding HQ transmitter circuit breaker closing node closes, and simultaneously sending the corresponding opening and closing signals to the wireless analog circuit breaker. The HQ receiver slave node of the wireless analog circuit breaker closes, completing the closing command of the protection device.

[0008] When the analog circuit breaker is in the closed position, the DL closed-position transmitter slave node of the wireless analog circuit breaker closes and the DL open-position transmitter slave node opens, simultaneously sending the corresponding opening and closing signals to the wireless slave. The DL closed-position receiver circuit breaker node of the wireless slave closes and the DL open-position receiver circuit breaker node opens. When the protection device issues a trip command, the trip relay TQ is energized and operates, its corresponding TQ transmitter circuit breaker trip node closes, and simultaneously sending the corresponding opening and closing signals to the wireless analog circuit breaker. The TQ receiver slave trip node of the wireless analog circuit breaker closes, completing the trip command of the protection device.

[0009] Furthermore, when the simulated circuit breaker is in the open position, the opening / closing holding relay KA is in the reset state, the position relay DL is not energized, its normally closed contact is conducting, its normally open contact is open, the open position indicator light is on, and the closed position indicator light is off; at this time, the simulated circuit breaker is ready to close. When the protection device issues a closing command or the local closing button is pressed, the closing circuit is energized with +110V DC. At this time, the opening / closing holding relay KA in the closing circuit is energized and remains in the activated state, its normally open contact is closed, and its normally closed contact is open; subsequently, the position relay DL operates, its normally open contact is closed, its normally closed contact is open, the closed position indicator light is on, and the open position indicator light is off; at this time, the closing circuit is also disconnected as the normally closed contact of the position relay DL is open, finally completing the closing process of the simulated circuit breaker.

[0010] When the simulated circuit breaker is in the closed position, the opening / closing holding relay KA is activated, the position relay DL is energized, its normally open contact is closed, its normally closed contact is open, the closed indicator light is on, and the open indicator light is off; at this time, the simulated circuit breaker is ready to open. When the protection device issues a trip command or the local trip button is pressed, the tripping circuit is energized with +110V DC. At this time, the opening / closing holding relay KA in the tripping circuit is energized and reset, and remains in the reset state, its normally closed contact is closed, and its normally open contact is open; subsequently, the position relay DL resets, its normally closed contact is closed, its normally open contact is open, the open indicator light is on, and the closed indicator light is off; at this time, the tripping circuit is also disconnected as the normally open contact of the position relay DL is open, finally completing the tripping process of the simulated circuit breaker.

[0011] Furthermore, when the simulated circuit breaker is in the closed position, and the closing node of the protection device or the local closing button is abnormally stuck, the closing circuit will always have +110V DC power. At this time, the anti-pumping circuit is energized, the anti-pumping relay K0 operates, its normally closed node opens, and its normally open node closes. The anti-pumping circuit is self-holding because its normally open node is conducting, and the closing circuit is also disconnected because the normally closed node of K0 is open. When the protection device or the local tripping button issues a tripping command at this time, the tripping and closing holding relay KA is energized and resets, and the position relay DL also resets accordingly, and the simulated circuit breaker is in the open position. Although the closing circuit always has +110V DC power, because the anti-pumping circuit is always in the energized state, the normally closed node of K0 in the closing circuit is in the open state.

[0012] When the simulated circuit breaker is in the open position, and the protection device's tripping node or local tripping button is abnormally stuck, the tripping circuit will always have +110V DC power. At this time, when the closing circuit receives a closing command and is energized, the simulated circuit breaker immediately closes. However, because the tripping circuit always has +110V DC power, the simulated circuit breaker immediately changes from the closed position to the open position. If the closing circuit also receives a closing command and is energized due to an abnormality, the anti-pumping circuit will be energized and conduct when the simulated circuit breaker closes, thus preventing the simulated circuit breaker from ultimately being in the open position.

[0013] Compared with existing technologies, this invention has the following advantages: This invention provides a multi-functional simulated circuit breaker based on wireless communication. This simulated circuit breaker achieves wireless control between the protection device and the simulated circuit breaker through wireless communication technology, solving the problems of high cable consumption and short circuits caused by reduced cable insulation in traditional simulated circuit breakers. By adopting a detachable wireless slave device, different protection devices can control the tripping and closing of the same simulated circuit breaker, solving the problem that traditional simulated circuit breakers can only be controlled one-to-one. This significantly reduces the number of simulated circuit breakers required for the training room and also improves compatibility with future expansion of protection devices, which is beneficial for the long-term planning of the training room. This invention can fully realize the functions of a field circuit breaker, including normal tripping and closing and anti-pumping functions, effectively ensuring the reliability and safety of the circuit breaker operation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a multi-functional analog circuit breaker based on wireless communication in an embodiment of the present invention;

[0015] Figure 2 This is a schematic diagram illustrating the working principle of wireless analog circuit breaker control and anti-pumping in an embodiment of the present invention. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0018] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0019] According to the requirements of the "Eighteen Major Grid Accident Prevention Measures" issued by the State Grid Corporation of China, the anti-pumping function of circuit breakers should be implemented in the circuit breaker body. Meanwhile, to address the problems of low compatibility and low reliability of traditional analog circuit breakers, this invention proposes a multi-functional analog circuit breaker based on wireless communication, the structure of which is as follows... Figure 1 As shown.

[0020] The wireless communication-based multi-functional analog circuit breaker includes a wireless analog circuit breaker and a wireless slave unit. The wireless analog circuit breaker is equipped with a DL (Digital Dispatch Transmitter Slave) node, a DL (Digital Closing Transmitter Slave) node, an HQ (Hyper-Receiver Slave Closing Node), and a TQ (Tele-Receiver Slave Tripping Node). The wireless slave unit is equipped with a DL (Digital Dispatch Transmitter Circuit Breaker) node, a DL (Digital Closing Transmitter Circuit Breaker) node, an HQ (Hyper-Transmitter Circuit Breaker Closing Node), a TQ (Tele-Transmitter Circuit Breaker Tripping Node), a closing relay HQ, and a tripping relay TQ. The DL (Digital Dispatch Transmitter Circuit Breaker) node, the closing relay HQ, and the wireless slave unit are all connected to the wireless circuit breaker. Relay HQ is connected to the closing circuit of the protection device, and the DL closing position receiving circuit breaker node and the opening relay TQ are connected to the tripping circuit of the protection device. The wireless analog circuit breaker communicates wirelessly with the wireless slave to synchronize the opening and closing states of the DL opening position transmitting slave node with the DL opening position receiving circuit breaker node, the DL closing position transmitting slave node with the DL closing position receiving circuit breaker node, the HQ receiving slave closing node with the HQ transmitting circuit breaker closing node, and the TQ receiving slave tripping node with the TQ transmitting circuit breaker tripping node.

[0021] The working principle of the multi-functional simulated circuit breaker is as follows:

[0022] 1. When the multi-functional analog circuit breaker is in the open position, the DL open position transmitter-slave node of the wireless analog circuit breaker closes and the DL close position transmitter-slave node opens, simultaneously sending the corresponding opening and closing signals to the wireless slave. The DL open position receiver-circuit breaker node of the wireless slave closes and the DL close position receiver-circuit breaker node opens. When the protection device issues a closing command, the closing relay HQ is energized and operates, its corresponding HQ transmitter-circuit breaker closing node closes, simultaneously sending the corresponding opening and closing signals to the wireless analog circuit breaker. The HQ receiver-slave node of the wireless analog circuit breaker closes, completing the protection device's closing command.

[0023] 2. When the multi-functional analog circuit breaker is in the closed position, the DL closed-position transmitter slave node of the wireless analog circuit breaker closes and the DL open-position transmitter slave node opens, simultaneously sending the corresponding opening and closing signals to the wireless slave. The DL closed-position receiver circuit breaker node of the wireless slave closes and the DL open-position receiver circuit breaker node opens. When the protection device issues a trip command, the trip relay TQ is energized and operates, its corresponding TQ transmitter circuit breaker trip node closes, simultaneously sending the corresponding opening and closing signals to the wireless analog circuit breaker. The TQ receiver slave trip node of the wireless analog circuit breaker closes, completing the trip command of the protection device.

[0024] The wireless slave unit of this multi-functional analog circuit breaker can be connected to the terminal block of any protection device according to the needs of the training room, so that one set of wireless analog circuit breaker can be used by multiple protection devices. This not only reduces the cable consumption of traditional analog circuit breakers, but also improves the compatibility of future expansion.

[0025] The control and anti-pumping working principle of the wireless analog circuit breaker in this embodiment is as follows: Figure 2 As shown.

[0026] The wireless analog circuit breaker includes an anti-pumping relay K0, a tripping / closing holding relay KA, a position relay DL, and tripping / closing indicator lights. The tripping / closing holding relay KA has two states: activated and reset. Activation indicates the circuit breaker is closed, and reset indicates the circuit breaker is open. The +110V DC positive terminal is connected to the closing circuit 7 via the local closing button and the HQ receiver slave closing node. The closing circuit 7 is divided into two paths: one path connects to the coil of the tripping / closing holding relay KA via the normally closed node of the anti-pumping relay K0 and the first normally closed node of the position relay DL; the other path connects to the coil of the anti-pumping relay K0 via a parallel circuit of the normally open node of the anti-pumping relay K0 and the first normally open node of the position relay DL. The +110V DC positive terminal is connected to the tripping circuit 37 via the local tripping button and the TQ receiver slave tripping node. The tripping circuit 37 connects to the coil of the second normally open node of the position relay DL. The node connects to the coil of the KA circuit breaker holding relay; the coils of the KA circuit breaker holding relay and the K0 anti-pumping relay are both connected to the negative terminal of -110V DC; the positive terminal of +110V DC is connected to the negative terminal of -110V DC via the normally open node of the KA circuit breaker holding relay and the coil of the DL position relay; the positive terminal of +110V DC is connected to the negative terminal of -110V DC via the third normally open node of the DL position relay and the closing indicator light (red light); the positive terminal of +110V DC is connected to the negative terminal of -110V DC via the second normally closed node of the DL position relay and the opening indicator light (green light).

[0027] The working principle of the wireless analog circuit breaker is as follows:

[0028] 1. When the multi-functional analog circuit breaker is in the open position, the open / close holding relay KA is in the reset state, the position relay DL is not energized, its normally closed contact is conducting, its normally open contact is open, the open position indicator light is on, and the closed position indicator light is off.

[0029] At this point, the simulated circuit breaker is ready to close. When the protection device issues a closing command or the local closing button is pressed, the closing circuit 7 is energized with +110V DC. At this time, the opening / closing holding relay KA in the closing circuit is energized and remains in the activated state, with its normally open contact closed and its normally closed contact open. Subsequently, the position relay DL operates, with its normally open contact closed and its normally closed contact open. The closed position indicator light illuminates, and the open position indicator light goes out. At this time, the closing circuit is also disconnected as the normally closed contact of the position relay DL opens, thus completing the closing process of the simulated circuit breaker.

[0030] 2. When the multi-functional analog circuit breaker is in the closed position, the opening and closing holding relay KA is in the activated state, the position relay DL is energized, its normally open contact is conducting, its normally closed contact is opening, the closed position indicator light is on, and the open position indicator light is off.

[0031] At this point, the simulated circuit breaker is ready to trip. When the protection device issues a trip command or the local trip button is pressed, the trip circuit 37 is energized with +110V DC. At this time, the trip / close holding relay KA in the trip circuit is energized and resets, remaining in the reset state, with its normally closed contact closed and its normally open contact open. Subsequently, the position relay DL resets, with its normally closed contact closed and its normally open contact open, the open position indicator light illuminates, and the closed position indicator light goes out. At this time, the trip circuit also disconnects as the normally open contact of the position relay DL opens, finally completing the tripping process of the simulated circuit breaker.

[0032] Abnormal state analysis:

[0033] 1. When the simulated circuit breaker is in the closed position, and the closing node of the protection device or the local closing button is abnormally stuck, the closing circuit 7 will always have +110V DC power. At this time, the anti-pumping circuit is energized, the anti-pumping relay K0 operates, its normally closed node opens, and its normally open node closes. The anti-pumping circuit is self-holding due to the conduction of its own normally open node, and the closing circuit 7 is also disconnected because the normally closed node of K0 is open. When the protection device or the local tripping button issues a tripping command at this time, the tripping and closing holding relay KA is energized and resets, and the position relay DL also resets accordingly, and the simulated circuit breaker is in the open position. Although the closing circuit 7 always has +110V DC power, because the anti-pumping circuit is always kept energized, the normally closed node of K0 in the closing circuit is in the open state, avoiding the phenomenon of the circuit breaker frequently and repeatedly "opening and closing" due to abnormalities, effectively solving the problem of the circuit board being burned out by the frequent "opening and closing" of traditional circuit breakers.

[0034] 2. When the simulated circuit breaker is in the open position, and the protection device's tripping node or local tripping button is abnormally stuck, the tripping circuit 7 will always have +110V DC power. At this time, when the closing circuit 7 receives a closing command and is energized, the simulated circuit breaker immediately closes. However, because the tripping circuit always has +110V DC power, the simulated circuit breaker immediately changes from the closed position to the open position. If the closing circuit 7 also receives a closing command and is energized due to an abnormality, the anti-pumping circuit will be energized and conduct when the simulated circuit breaker closes, thus preventing the simulated circuit breaker from ultimately being in the open position.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A multifunctional analog circuit breaker based on wireless communication, characterized in that, The system includes a wireless analog circuit breaker and a wireless slave unit. The wireless analog circuit breaker is equipped with a DL (Digital Disconnect Transmitter Slave) node, a DL (Digital Close Transmitter Slave) node, an HQ (Digital Receiver Slave) closing node, and a TQ (Digital Receiver Slave) tripping node. The wireless slave unit is equipped with a DL (Digital Disconnect Transmitter Circuit Breaker) node, a DL (Digital Close Transmitter Circuit Breaker) node, an HQ (Digital Receiver Circuit Breaker) closing node, a TQ (Digital Receiver Circuit Breaker) tripping node, a closing relay HQ, and a tripping relay TQ. The DL (Digital Disconnect Transmitter Circuit Breaker) node and the closing relay HQ are connected to a protection device. The closing circuit of the protection device, wherein the DL closing position receiving circuit breaker node and the TQ tripping relay are connected to the tripping circuit of the protection device; the wireless analog circuit breaker communicates wirelessly with the wireless slave to synchronize the opening and closing states of the DL opening position transmitting slave node with the DL opening position receiving circuit breaker node, the DL closing position transmitting slave node with the DL closing position receiving circuit breaker node, the HQ receiving slave closing node with the HQ transmitting circuit breaker closing node, and the TQ receiving slave tripping node with the TQ transmitting circuit breaker tripping node. The wireless analog circuit breaker includes an anti-pumping relay K0, a trip / close holding relay KA, a position relay DL, and trip / close indicator lights. The +110V DC positive terminal is connected to the closing circuit via the local closing button and the HQ receiver slave closing node. The closing circuit is divided into two paths: one path connects to the coil of the trip / close holding relay KA via the normally closed node of the anti-pumping relay K0 and the first normally closed node of the position relay DL; the other path connects to the coil of the anti-pumping relay K0 via a parallel circuit of the normally open node of the anti-pumping relay K0 and the first normally open node of the position relay DL. The +110V DC positive terminal is connected to the local trip button and the TQ receiver slave trip node. The tripping circuit is connected, and the tripping circuit is connected to the coil of the tripping and closing holding relay KA via the second normally open node of the position relay DL; the coil of the tripping and closing holding relay KA and the coil of the anti-pumping relay K0 are both connected to the negative terminal of -110V DC; the positive terminal of +110V DC is connected to the negative terminal of -110V DC via the normally open node of the tripping and closing holding relay KA and the coil of the position relay DL; the positive terminal of +110V DC is connected to the negative terminal of -110V DC via the third normally open node of the position relay DL and the closing indicator light; the positive terminal of +110V DC is connected to the negative terminal of -110V DC via the second normally closed node of the position relay DL and the opening indicator light.

2. The multifunctional analog circuit breaker based on wireless communication according to claim 1, characterized in that, The circuit breaker holding relay KA has two states: active and reset. When active, it indicates that the circuit breaker is closed; when reset, it indicates that the circuit breaker is open.

3. The control method for a multifunctional analog circuit breaker based on wireless communication according to claim 1, characterized in that, When the analog circuit breaker is in the open position, the DL open position transmitter-slave node of the wireless analog circuit breaker closes and the DL close position transmitter-slave node opens, simultaneously sending the corresponding opening and closing signals to the wireless slave. The DL open position receiver-circuit breaker node of the wireless slave closes and the DL close position receiver-circuit breaker node opens. When the protection device issues a closing command, the closing relay HQ is energized and operates, its corresponding HQ transmitter-circuit breaker closing node closes, simultaneously sending the corresponding opening and closing signals to the wireless analog circuit breaker. The HQ receiver-slave node of the wireless analog circuit breaker closes, completing the protection device's closing command. When the analog circuit breaker is in the closed position, the DL closed-position transmitter slave node of the wireless analog circuit breaker closes and the DL open-position transmitter slave node opens, simultaneously sending the corresponding opening and closing signals to the wireless slave. The DL closed-position receiver circuit breaker node of the wireless slave closes and the DL open-position receiver circuit breaker node opens. When the protection device issues a trip command, the trip relay TQ is energized and operates, its corresponding TQ transmitter circuit breaker trip node closes, and simultaneously sending the corresponding opening and closing signals to the wireless analog circuit breaker. The TQ receiver slave trip node of the wireless analog circuit breaker closes, completing the trip command of the protection device.

4. The control method for a multifunctional analog circuit breaker based on wireless communication according to claim 3, characterized in that, When the simulated circuit breaker is in the open position, the opening / closing holding relay KA is in the reset state, the position relay DL is not energized, its normally closed contact is conducting, its normally open contact is open, the open position indicator light is on, and the closed position indicator light is off; at this time, the simulated circuit breaker is ready to close. When the protection device issues a closing command or the local closing button is pressed, the closing circuit is energized with +110V DC. At this time, the opening / closing holding relay KA in the closing circuit is energized and remains in the activated state, its normally open contact is closed, and its normally closed contact is open; subsequently, the position relay DL operates, its normally open contact closes, its normally closed contact opens, the closed position indicator light is on, and the open position indicator light is off; at this time, the closing circuit is also disconnected as the normally closed contact of the position relay DL opens, finally completing the closing process of the simulated circuit breaker. When the simulated circuit breaker is in the closed position, the opening / closing holding relay KA is activated, the position relay DL is energized, its normally open contact is closed, its normally closed contact is open, the closed indicator light is on, and the open indicator light is off; at this time, the simulated circuit breaker is ready to open. When the protection device issues a trip command or the local trip button is pressed, the tripping circuit is energized with +110V DC. At this time, the opening / closing holding relay KA in the tripping circuit is energized and reset, and remains in the reset state, its normally closed contact is closed, and its normally open contact is open; subsequently, the position relay DL resets, its normally closed contact is closed, its normally open contact is open, the open indicator light is on, and the closed indicator light is off; at this time, the tripping circuit is also disconnected as the normally open contact of the position relay DL is open, finally completing the tripping process of the simulated circuit breaker.

5. The control method for a multifunctional analog circuit breaker based on wireless communication according to claim 3, characterized in that, When the simulated circuit breaker is in the closed position, and the closing node of the protection device or the local closing button is abnormally stuck, the closing circuit will always have +110V DC power. At this time, the anti-pumping circuit is energized, the anti-pumping relay K0 operates, its normally closed node opens, and its normally open node closes. The anti-pumping circuit is self-holding because its normally open node is conducting, and the closing circuit is also disconnected because the normally closed node of K0 is open. When the protection device or the local tripping button issues a tripping command at this time, the tripping and closing holding relay KA is energized and resets, and the position relay DL also resets, and the simulated circuit breaker is in the open position. Although the closing circuit always has +110V DC power, because the anti-pumping circuit is always in the energized state, the normally closed node of K0 in the closing circuit is in the open state. When the simulated circuit breaker is in the open position, and the protection device's tripping node or local tripping button is abnormally stuck, the tripping circuit will always have +110V DC power. At this time, when the closing circuit receives a closing command and is energized, the simulated circuit breaker immediately closes. However, because the tripping circuit always has +110V DC power, the simulated circuit breaker immediately changes from the closed position to the open position. If the closing circuit also receives a closing command and is energized due to an abnormality, the anti-pumping circuit will be energized and conduct when the simulated circuit breaker closes, thus preventing the simulated circuit breaker from ultimately being in the open position.

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