Passive protection device

Abstract

The utility model discloses a passive protection device relates to protection device technical field. Passive protection device includes main control module, open circuit, open circuit, remote signalling circuit, telemeter circuit, frequency measurement circuit, communication circuit and power module, wherein, main control module is connected with open circuit, open circuit, remote signalling circuit, telemeter circuit, frequency measurement circuit, communication circuit electricity respectively, and main control module is used for controlling the working condition of each circuit and is communicated with each circuit, and power module is connected with main control module, open circuit, open circuit, remote signalling circuit, telemeter circuit, frequency measurement circuit and communication circuit electricity respectively, and is used for providing the working power supply for each circuit. According to the passive protection device of the utility model embodiment, the normal operation of external equipment is ensured through the monitoring of external equipment in many aspects, and the normal work of the device is ensured through the replacement of multiple different power supplies, and the flexibility is higher, and the application range is wider.

Description

Technical Field

[0001] This utility model relates to the field of protection device technology, and in particular to a passive protection device. Background Technology

[0002] Ring main unit (RMU) systems are prone to short circuits and other faults, and are also susceptible to operational errors. Therefore, they require monitoring and protection devices. Current protection devices, however, require external power, limiting their application scenarios. Furthermore, their functionality is not comprehensive enough to fully guarantee the normal operation of the RMU system. In addition, existing circuit protection devices often rely on external power supplies or complex control circuits, resulting in high costs, slow response times, and the potential lack of a stable external power source. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a passive protection device that can provide comprehensive protection for ring main unit systems without the need for an external power supply.

[0004] The passive protection device according to an embodiment of the present utility model includes:

[0005] Main control module;

[0006] An input circuit is electrically connected to the main control module;

[0007] An output circuit is electrically connected to the main control module, and the output circuit is used to output an output signal;

[0008] The remote signaling circuit is electrically connected to the input circuit. The remote signaling circuit is used to collect remote signaling signals and send them to the main control module through the input circuit.

[0009] The telemetry circuit is electrically connected to the main control module and is used to collect telemetry signals;

[0010] A frequency measurement circuit, wherein the input terminal of the frequency measurement circuit is electrically connected to the output terminal of the telemetry circuit, and the output terminal of the frequency measurement circuit is electrically connected to the main control module;

[0011] The communication circuit is electrically connected to the main control module;

[0012] The power supply module is electrically connected to the main control module, the input circuit, the output circuit, the remote signaling circuit, the telemetry circuit, the frequency measurement circuit, and the communication circuit, respectively, and the power supply module is used to provide working power.

[0013] According to some embodiments of the present invention, at least one of the following circuits is also included:

[0014] A reset circuit, which is electrically connected to the main control module and the power supply module;

[0015] The storage circuit is electrically connected to the main control module and the power supply module.

[0016] According to some embodiments of this utility model, a button power-on circuit is also included, which is electrically connected to the main control module and the power supply module.

[0017] According to some embodiments of the present invention, at least one of the following circuits is also included:

[0018] A button circuit, which is electrically connected to the main control module and the power supply module;

[0019] A real-time clock circuit is electrically connected to the main control module.

[0020] According to some embodiments of the present invention, a display circuit is also included, which is electrically connected to the main control module and the power supply module.

[0021] According to some embodiments of the present invention, it also includes an LED indicator circuit, which is electrically connected to the main control module and the power supply module.

[0022] According to some embodiments of this utility model, the power supply module includes:

[0023] A switching power supply circuit is used to obtain AC power and convert the AC power into 5V DC voltage.

[0024] The remote signaling power supply circuit has its input terminal electrically connected to the output terminal of the switching power supply circuit, and its output terminal electrically connected to the power supply terminal of the remote signaling circuit.

[0025] A first reference voltage circuit, wherein the input terminal of the first reference voltage circuit is electrically connected to the output terminal of the switching power supply circuit, and the output terminal of the first reference voltage circuit is electrically connected to the power supply terminal of the telemetry circuit.

[0026] The second reference voltage circuit has its input terminal electrically connected to the output terminal of the switching power supply circuit, and its output terminal electrically connected to the main control module.

[0027] A voltage conversion circuit, wherein the input terminal of the voltage conversion circuit is electrically connected to the output terminal of the switching power supply circuit, is used to convert the 5V DC voltage into a 3.3V DC voltage;

[0028] A boost circuit, wherein the input terminal of the boost circuit is electrically connected to the output terminal of the switching power supply circuit, and the output terminal of the boost circuit is electrically connected to the power supply terminal of the switching circuit.

[0029] A battery charging boost management circuit is provided, wherein the input terminal of the battery charging boost management circuit is electrically connected to the output terminal of the switching power supply circuit, and the output terminal of the battery charging boost management circuit is connected to a rechargeable battery.

[0030] According to some embodiments of this utility model, a battery voltage sampling circuit is also included, which is used to collect the voltage of the rechargeable battery and send it to the main control module.

[0031] According to some embodiments of the present invention, a charging interface circuit is also included, wherein the input terminal of the charging interface circuit is electrically connected to the output terminal of the switching power supply circuit.

[0032] According to some embodiments of the present invention, the communication circuit includes an RS485 circuit and a network port circuit, both of which are electrically connected to the main control module.

[0033] The passive protection device according to the embodiments of this utility model has at least the following beneficial effects: by setting up an input circuit, a remote signaling circuit, a remote measurement circuit, and a frequency measurement circuit, it can acquire remote signaling signals, remote measurement signals, and frequency measurement signals to monitor external devices from multiple perspectives and ensure the normal operation of external devices; by setting up an output circuit, it can control the operating status of external devices; through the communication module, it can mechanically communicate with external devices; and through the power supply module, it can provide working power to the device. This passive protection device can supply power to the device even without an external power source, making it more flexible in use, and it can monitor external devices from multiple perspectives to ensure their normal operation.

[0034] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0035] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0036] Figure 1 This is a schematic diagram of the frame of the passive protection device according to an embodiment of the present utility model;

[0037] Figure 2 This is a schematic diagram of the circuit principle of the main control module on the motherboard in an embodiment of this utility model;

[0038] Figure 3This is a schematic diagram of the circuit principle of the input circuit on the motherboard in an embodiment of the present utility model;

[0039] Figure 4 This is a schematic diagram of the output drive circuit on the motherboard in an embodiment of the present invention.

[0040] Figure 5 This is a schematic diagram of the reset circuit on the motherboard according to an embodiment of the present invention.

[0041] Figure 6 This is a schematic diagram of the circuit principle of the storage circuit on the motherboard according to an embodiment of the present utility model.

[0042] Figure 7 This is a schematic diagram of the LED indicator circuit on the motherboard according to an embodiment of the present invention.

[0043] Figure 8 This is a schematic diagram of the charging interface circuit on the motherboard according to an embodiment of the present invention.

[0044] Figure 9 This is a schematic diagram of the display circuit on the motherboard according to an embodiment of the present invention;

[0045] Figure 10 This is a schematic diagram of the real-time clock circuit on the motherboard according to an embodiment of the present invention.

[0046] Figure 11 This is a schematic diagram of the button circuit on the motherboard according to an embodiment of the present utility model.

[0047] Figure 12 This is a schematic diagram of the power button circuit on the motherboard according to an embodiment of the present invention.

[0048] Figure 13 This is a schematic diagram of the voltage conversion circuit on the motherboard according to an embodiment of the present invention.

[0049] Figure 14 This is a schematic diagram of the circuit principle of the second reference voltage circuit on the motherboard in an embodiment of the present invention;

[0050] Figure 15 This is a schematic diagram of the circuit principle of the connector on the motherboard according to an embodiment of the present utility model;

[0051] Figure 16 This is a schematic diagram of the switching power supply circuit of the input board according to an embodiment of the present utility model.

[0052] Figure 17 This is a schematic diagram of the remote signaling circuit of the input board in an embodiment of the present utility model.

[0053] Figure 18 This is a schematic diagram of the RS485 circuit of the input board in an embodiment of the present invention.

[0054] Figure 19 and Figure 20 This is a schematic diagram of the network port circuit of the input board in an embodiment of the present utility model.

[0055] Figure 21 This is a schematic diagram of the circuit principle of the connector and terminal block of the access board according to an embodiment of the present utility model;

[0056] Figure 22 This is a schematic diagram of the circuit principle of the opening circuit of the opening board in an embodiment of this utility model;

[0057] Figure 23 This is a schematic diagram of the telemetry circuit of the opening board in an embodiment of the present utility model.

[0058] Figure 24 This is a schematic diagram of the circuit principle of the first reference voltage circuit of the opening board in an embodiment of this utility model.

[0059] Figure 25 This is a schematic diagram of the boost circuit of the output board in an embodiment of the present utility model.

[0060] Figure 26 A schematic diagram of the battery charging boost management circuit of the open board according to an embodiment of this utility model;

[0061] Figure 27 This is a schematic diagram of the battery voltage sampling circuit of the open board according to an embodiment of the present invention.

[0062] Figure 28 This is a schematic diagram of the circuit principle of the connector and terminal block of the cutout board according to an embodiment of this utility model. Detailed Implementation

[0063] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0064] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0065] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0066] It should be noted that the passive protection device according to the embodiments of this application consists of three circuit boards: a main board, an input board, and an output board. Figures 2 to 15 For circuits set on the motherboard, Figures 16 to 21 For the circuitry set on the input board, Figures 22 to 28 This refers to the circuitry set on the output board.

[0067] like Figure 1 As shown, the passive protection device according to an embodiment of this utility model includes a main control module 100, an input circuit 200, an output circuit 300, a remote signaling circuit 400, a telemetry circuit 500, a frequency measurement circuit 600, a communication circuit 700, and a power supply module 800. The main control module 100 is electrically connected to the input circuit 200, output circuit 300, remote signaling circuit 400, telemetry circuit 500, frequency measurement circuit 600, and communication circuit 700, and is used to control the operating state of each circuit and communicate with each circuit. The power supply module 800 is electrically connected to the main control module 100, input circuit 200, output circuit 300, remote signaling circuit 400, telemetry circuit 500, frequency measurement circuit 600, and communication circuit 700, and is used to provide operating power to each circuit. The input circuit 200 is used to acquire the remote signaling signal collected by the remote signaling circuit 500 and send the remote signaling signal to the main control module 100. The output circuit 300 outputs output signals, transmitting logic commands (such as trip and close commands) from the main control module 100 to drive external actuators. The remote signaling circuit 400 collects remote signaling signals, acquiring switch status signals from external devices (such as circuit breaker open / close positions, protection plate activation / deactivation, etc.), and sends them to the main control module 100 via the input circuit 200 to achieve real-time equipment status monitoring. The telemetry circuit 500 collects telemetry signals, remotely measuring continuously changing electrical parameters and sending them to the main control module 100. The frequency measurement circuit 600 dynamically monitors the power grid frequency and sends the results to the main control module 100. The communication circuit 700 enables communication between the main control module 100 and the host computer / external devices.

[0068] Specifically, such as Figure 2 As shown, in this example of the present invention, the main control module 100 uses an STM32F103VET6 CPU (other processors can also be used, and the specific model is not limited). The CPU controls the working status of the entire device and communicates with external devices.

[0069] In some embodiments of this utility model, the specific circuit design of the input circuit 200 is as follows: Figure 3 As shown, in this example, the input circuit 200 includes a bidirectional bus transceiver U10 and resistor arrays RP1 / RP2. The input circuit 200 receives the remote signaling signals collected by the remote signaling circuit 400 through YX1 / YX2 / YX3 / YX4 / YX5 / YX6, and after passing through the bidirectional bus transceiver U10, it sends the signals to the main control module 100 through YX_1 / YX_2 / YX_3 / YX_4 / YX_5 / YX_6.

[0070] In some embodiments of this utility model, such as Figure 4 As shown, the motherboard also includes an output driver circuit, which includes chip U3. This chip drives the output circuit 300 based on the output signals sent by the main control module 100. U3 is connected to the main control module 100 via KC1 / KC2 / KC3 / KC4 / KC_EN, receives the output signals from the main control module 100, performs level conversion on the signals, and then sends them to the output circuit 300 via KC_1 / KC_2 / KC_3 / KC_4, thereby driving the output circuit 300 to operate. The specific circuit design of the output circuit 300 is as follows... Figure 22 As shown, the output circuit 300 includes multiple relays, such as RLY1, RLY2, RLY3 and RLY4. Each relay is connected to the output drive circuit through an optocoupler. By controlling the on and off of the multiple relays, it is possible to control whether to output an output signal to drive an external actuator.

[0071] like Figure 5 As shown, in some embodiments of this utility model, a reset circuit is also provided on the motherboard. The reset circuit is electrically connected to the main control module 100. The reset circuit includes a reset control chip U2, which can be a model such as MAX706RESA, used to reset and restart the main control module 100 when the device malfunctions. J3 is a programming socket used for programming.

[0072] like Figure 6 As shown, in some embodiments of this utility model, a storage circuit is also provided on the motherboard. The storage circuit is electrically connected to the main control module 100. The storage circuit includes a storage chip U6, which can be of the 24LC256-I / SN type, and is used to store the data and programs of the main control module 100.

[0073] like Figure 7 As shown, in some embodiments of this utility model, an LED indicator circuit is also provided on the motherboard, which is electrically connected to the main control module 100. The LED indicator circuit includes several LED indicator lights, which are used to indicate different states of the device, such as power on, power off, charging, and fault, by using LED indicator lights of different colors. By setting up the LED indicator circuit, it is convenient for operators to intuitively view the operating status of the device.

[0074] like Figure 8 As shown, in some embodiments of this utility model, a charging interface circuit is also provided on the motherboard. The charging interface circuit adopts a charging interface such as Type-C, which can charge the rechargeable battery of the device. It should be noted that in the passive protection device of this application embodiment, a rechargeable battery VBAT1 and a disposable battery VBAT2 are provided. When there is no external power supply, the device can be powered by the rechargeable battery VBAT1 to ensure the normal operation of the device; when there is no external power supply and the rechargeable battery is too low, the device uses the disposable battery to ensure the normal operation of the device in the event of an abnormal power outage; when there is an external power supply, the device is powered by the external power source, and the rechargeable battery can be charged through the charging interface circuit. In addition, the device is also provided with several CT power supply circuits. When there is no external power supply, the CT power supply circuits can also draw power from the high-voltage transmission line through the current transformer to power the device. The passive protection device according to the embodiments of this application can work when connected to an external power source, or when there is no external power source, or when powered by a rechargeable battery. It can also be powered by a disposable battery when the rechargeable battery is low, or when powered by a CT power supply circuit. By changing various power sources, the normal operation of the device can be ensured, which is highly flexible and has a wide range of applications.

[0075] like Figure 9 As shown, in some embodiments of this utility model, a display circuit is also provided on the motherboard, and the display circuit is electrically connected to the main control module 100. The display circuit is used to display the information collected by the device or the specific operating status. By setting up the display circuit, it is convenient for operators to intuitively view the operating status of the device. At the same time, the display circuit can also be equipped with a human-machine interface, which is convenient for operators to operate the device through the human-machine interface.

[0076] like Figure 10 As shown, in some embodiments of this utility model, a real-time clock circuit is also provided on the motherboard. The real-time clock circuit includes a real-time clock chip U9, which can be of the RX-8025SA_1 model, etc. It can perform functions such as power failure recovery, system initialization timing, and process scheduling support. The real-time clock chip is powered by a battery BAT1.

[0077] like Figure 11 As shown, in some embodiments of this utility model, a button circuit is also provided on the motherboard. The button circuit is electrically connected to the main control module 100. The button circuit includes multiple buttons, such as SW1-SW7, which can control the working state of the device. The button circuit can be powered by a 3.3V voltage, a rechargeable battery VBAT1, or a disposable battery VBAT2.

[0078] like Figure 12 As shown, in some embodiments of this utility model, a button power-on circuit is also provided on the motherboard. The button power-on circuit is electrically connected to the main control module 100, and the power on and off of the device is controlled through the button power-on circuit.

[0079] like Figure 15 As shown, in some embodiments of this utility model, the motherboard is provided with connectors J1 and J2. The motherboard is connected to the input board through connector J1, and the motherboard is connected to the output board through connector J2.

[0080] In some embodiments of this utility model, the power supply module 800 includes:

[0081] A switching power supply circuit is used to obtain AC power and convert the AC power into 5V DC voltage.

[0082] The remote signaling power supply circuit has its input terminal electrically connected to the output terminal of the switching power supply circuit, and its output terminal electrically connected to the power supply terminal of the remote signaling circuit.

[0083] The first reference voltage circuit has its input terminal electrically connected to the output terminal of the switching power supply circuit, and its output terminal electrically connected to the power supply terminal of the telemetry circuit.

[0084] The second reference voltage circuit has its input terminal electrically connected to the output terminal of the switching power supply circuit, and its output terminal electrically connected to the main control module.

[0085] The voltage conversion circuit has its input terminal electrically connected to the output terminal of the switching power supply circuit, and is used to convert 5V DC voltage into 3.3V DC voltage.

[0086] The boost circuit has its input terminal electrically connected to the output terminal of the switching power supply circuit, and its output terminal electrically connected to the power supply terminal of the switching power supply circuit.

[0087] The battery charging boost management circuit has its input terminal electrically connected to the output terminal of the switching power supply circuit, and its output terminal connected to the rechargeable battery.

[0088] Specifically, such as Figure 16 As shown, the switching power supply circuit is set on the input board. It is connected to an external 220V AC power supply and converts the 220V AC power supply into 5V DC voltage, thereby providing the working voltage for each circuit of the device.

[0089] like Figure 17 As shown, in this example, the remote signaling power supply circuit is located on the input board. The remote signaling power supply circuit converts the 5V DC voltage into the operating power supply YXCOM of the remote signaling circuit 400 through U10. The remote signaling circuit 400 isolates the signals through optocouplers U8 and U9 and sends the acquired remote signaling signals to the main control module 100.

[0090] like Figure 24 As shown, in this example, the first reference voltage circuit is located on the output board. This circuit converts the 5V DC voltage to 1.5V DC voltage via voltage regulator U2, providing a reference voltage for the telemetry circuit 500. Figure 23 As shown, the telemetry circuit 500 can monitor the current value of the three-phase current in real time, reflecting the load balance status and equipment operation.

[0091] like Figure 14 As shown, the second reference voltage circuit is located on the motherboard. The second reference voltage circuit converts the 5V voltage into REF3_3V voltage through the voltage reference chip U8 to provide the reference voltage for the main control module 100.

[0092] like Figure 13 As shown, the voltage conversion circuit is located on the motherboard. The voltage conversion circuit converts the 5V DC voltage to 3.3V DC voltage through the voltage regulator chip U5 to power the display circuit, button circuit and other circuits.

[0093] like Figure 25 As shown, the boost circuit is located on the output board. The boost circuit, through the boost chip U3, converts the 5V DC voltage to a 30V voltage PWR_JDQ, and powers the energy storage capacitor EC1. Figure 22 As shown, when the relay is turned on, the energy storage capacitor EC1 outputs voltage VCAP, which drives the external actuator.

[0094] like Figure 26 As shown, in some embodiments of this utility model, a battery charging boost management circuit is disposed on the output board, and the battery charging boost management circuit is used to charge and manage the rechargeable battery VBAT1.

[0095] like Figures 18 to 20 As shown, in some embodiments of this utility model, the communication circuit includes an RS485 circuit and a network port circuit, both of which are electrically connected to the main control module 100. The RS485 circuit is as follows: Figure 18As shown, through this RS485 circuit, the main control module 100 can communicate with external devices or a host computer. The network port circuit is as follows... Figure 19 and Figure 20 As shown, the main control module 100 can communicate with external devices or a host computer through this network port circuit.

[0096] like Figure 21 As shown, the input board is equipped with terminal block J1 and connector J2. The input board is connected to the main board through connector J2, and the input board is connected to external devices through terminal block J1.

[0097] like Figure 27 As shown, in some embodiments of this utility model, a battery voltage sampling circuit is also provided on the output board to collect the voltage of the rechargeable battery and send it to the main control module 100, so that the user can understand the power status of the device in a timely manner.

[0098] like Figure 28 As shown, in some embodiments of this utility model, the opening board is provided with a wiring terminal J1, a connector J2 and an interface J3. The opening board is connected to an external device through the wiring terminal J1, connected to the motherboard through the connector J2, and connected to the rechargeable battery VBAT1 through the interface J3.

[0099] The passive protection device according to embodiments of this utility model, by setting up an input circuit, a remote signaling circuit, a remote measurement circuit, and a frequency measurement circuit, can acquire remote signaling signals, remote measurement signals, and frequency measurement signals to monitor external devices from multiple aspects and ensure their normal operation. By setting up an output circuit, the operating status of external devices can be controlled. Through a communication module, it can communicate with external devices, and through a power supply module, it can provide operating power to the device. The passive protection device according to embodiments of this application can operate with an external power supply, or it can operate using a rechargeable battery when no external power supply is available. It can also operate using a disposable battery when the rechargeable battery is low, or it can draw power from a CT power supply circuit. By switching between various power sources, the normal operation of the device is ensured, exhibiting high flexibility and a wide range of applications. This passive protection device has multiple power supply methods, achieving fast and reliable protection functions through optimized circuit structure; it adopts a passive design, requiring no external power supply, reducing system complexity; and its power supply circuit can automatically and flexibly switch according to the availability of an external power source, ensuring stable power supply to the device.

[0100] In the description of this specification, references to terms such as "one embodiment," "further embodiment," "some specific embodiments," or "some examples," etc., indicate that a specific feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0101] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A passive protection device, characterized in that, include: Main control module; An input circuit is electrically connected to the main control module. An output circuit is electrically connected to the main control module, and the output circuit is used to output an output signal; The remote signaling circuit is electrically connected to the input circuit. The remote signaling circuit is used to collect remote signaling signals and send them to the main control module through the input circuit. The telemetry circuit is electrically connected to the main control module and is used to collect telemetry signals; A frequency measurement circuit, wherein the input terminal of the frequency measurement circuit is electrically connected to the output terminal of the telemetry circuit, and the output terminal of the frequency measurement circuit is electrically connected to the main control module; The communication circuit is electrically connected to the main control module; The power supply module is electrically connected to the main control module, the input circuit, the output circuit, the remote signaling circuit, the telemetry circuit, the frequency measurement circuit, and the communication circuit, respectively, and the power supply module is used to provide working power.

2. The passive protection device according to claim 1, characterized in that, It also includes at least one of the following circuits: A reset circuit, which is electrically connected to the main control module and the power supply module; The storage circuit is electrically connected to the main control module and the power supply module.

3. The passive protection device according to claim 1, characterized in that, It also includes a button power-on circuit, which is electrically connected to the main control module and the power supply module.

4. The passive protection device according to claim 1, characterized in that, It also includes at least one of the following circuits: A button circuit, which is electrically connected to the main control module and the power supply module; A real-time clock circuit is electrically connected to the main control module.

5. The passive protection device according to claim 1, characterized in that, It also includes a display circuit, which is electrically connected to the main control module and the power supply module.

6. The passive protection device according to claim 1, characterized in that, It also includes an LED indicator circuit, which is electrically connected to the main control module and the power supply module.

7. The passive protection device according to claim 1, characterized in that, The power supply module includes: A switching power supply circuit is used to obtain AC power and convert the AC power into 5V DC voltage. The remote signaling power supply circuit has its input terminal electrically connected to the output terminal of the switching power supply circuit, and its output terminal electrically connected to the power supply terminal of the remote signaling circuit. A first reference voltage circuit, wherein the input terminal of the first reference voltage circuit is electrically connected to the output terminal of the switching power supply circuit, and the output terminal of the first reference voltage circuit is electrically connected to the power supply terminal of the telemetry circuit. The second reference voltage circuit has its input terminal electrically connected to the output terminal of the switching power supply circuit, and its output terminal electrically connected to the main control module. A voltage conversion circuit, wherein the input terminal of the voltage conversion circuit is electrically connected to the output terminal of the switching power supply circuit, is used to convert the 5V DC voltage into a 3.3V DC voltage; A boost circuit, wherein the input terminal of the boost circuit is electrically connected to the output terminal of the switching power supply circuit, and the output terminal of the boost circuit is electrically connected to the power supply terminal of the switching circuit. A battery charging boost management circuit is provided, wherein the input terminal of the battery charging boost management circuit is electrically connected to the output terminal of the switching power supply circuit, and the output terminal of the battery charging boost management circuit is connected to a rechargeable battery.

8. The passive protection device according to claim 7, characterized in that, It also includes a battery voltage sampling circuit for collecting the voltage of the rechargeable battery and sending it to the main control module.

9. The passive protection device according to claim 7, characterized in that, It also includes a charging interface circuit, the input terminal of which is electrically connected to the output terminal of the switching power supply circuit.

10. The passive protection device according to claim 1, characterized in that, The communication circuit includes an RS485 circuit and a network port circuit, both of which are electrically connected to the main control module.

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