Lightning arrester on-line monitoring device

Abstract

The invention relates to the technical field of lightning arrester on-line monitoring, in particular to a lightning arrester on-line monitoring device which comprises a monitoring device body and is characterized in that the monitoring device body is composed of a power circuit, a LoRa circuit, an MCU circuit, an RTC loop, a nixie tube driving loop, an ADC loop and a FLASH loop. The power supply circuit comprises a P4 input port, an FA1 fuse, an R12 piezoresistor, a P5 power supply module, a C19 aluminum electrolytic capacitor, a D6 voltage-regulator tube and a U5 power supply chip, the LoRa wireless communication module is arranged to communicate with an upper computer, on one hand, the problem of communication distance is solved, and remote networking can be realized; and on the other hand, parallel processing of multiple channels and multiple data rates is supported.

Description

Technical Field

[0001] The present invention relates to the technical field of on-line monitoring of lightning arresters, and particularly to an on-line monitoring device for lightning arresters. Background Art

[0002] The main working principle of the on-line monitoring device for lightning arresters is to collect the resistive current and leakage current passing through the metal oxide lightning arrester through a current transformer, and obtain a relatively accurate current parameter after filtering out high-order harmonics through filtering algorithms such as Fourier transform, and then monitor the insulation effect of the lightning arrester by communicating with the upper computer.

[0003] When the existing on-line monitoring device for lightning arresters is in use, data is transmitted to the upper computer through the 485 bus. On the one hand, when the communication distance of the 485 bus is farther, its communication rate is lower, which is not suitable for long-distance transmission; on the other hand, since the 485 bus adopts the master polling method, its throughput is lower, which is not applicable to occasions with a large amount of communication data and the real-time performance is poor. Data can only be exported through the data bus, and there is a time lag at this time. When the entire power grid is shut down for maintenance or power failure occurs due to an abnormality, the device will also stop working due to the loss of power and cannot monitor the state of the lightning arrester during the occurrence of the abnormality. Summary of the Invention

[0004] (I) Technical Problems to be Solved In view of the deficiencies of the prior art, the present invention provides an on-line monitoring device for lightning arresters.

[0005] (II) Technical Solutions To achieve the above object, the present invention provides the following technical solutions: An on-line monitoring device for a lightning arrester, comprising a monitoring device main body, and the monitoring device main body is composed of a power supply circuit, a LoRa circuit, an MCU circuit, an RTC circuit, a digital tube driving circuit, an ADC circuit and a FLASH circuit. The power supply circuit includes a P4 input port, an FA1 fuse, an R12 varistor, a P5 power module, a C19 aluminum electrolytic capacitor, a D6 voltage regulator diode and a U5 power chip, and the P4 input port, the FA1 fuse, the R12 varistor, the P5 power module, the C19 aluminum electrolytic capacitor, the D6 voltage regulator diode and the U5 power chip are electrically connected. The LoRa circuit includes a LoRa module, an R1 pull-up resistor, a C1 filter capacitor and an R2 pull-up resistor, and the LoRa module, the R1 pull-up resistor, the C1 filter capacitor and the R2 pull-up resistor are electrically connected. The MCU circuit includes an MCU chip, a C4 filter capacitor, a C9 filter capacitor, a C10 filter capacitor, a C11 filter capacitor, a C12 filter capacitor, a C13 filter capacitor, a C2 compensation capacitor, a C3 compensation capacitor, a Y1 crystal oscillator, an R9 pull-up resistor, a C5 filter capacitor, an R3 pull-up resistor, an R4 pull-up resistor, a P2 programming port, an R6 pull-up resistor, an R7 pull-up resistor, an R8 pull-up resistor, a C6 filter capacitor, a C7 filter capacitor and a C8 filter capacitor, and the MCU chip, the C4 filter capacitor, the C9 filter capacitor, the C10 filter capacitor, the C11 filter capacitor, the C12 filter capacitor, the C13 filter capacitor, the C2 compensation capacitor, the C3 compensation capacitor, the Y1 crystal oscillator, the R9 pull-up resistor, the C5 filter capacitor, the R3 pull-up resistor, the R4 pull-up resistor, the P2 programming port, the R6 pull-up resistor, the R7 pull-up resistor, the R8 pull-up resistor, the C6 filter capacitor, the C7 filter capacitor and the C8 filter capacitor are electrically connected. The RTC circuit includes a C14 compensation capacitor, a C15 compensation capacitor and a Y2 crystal oscillator, and the C14 compensation capacitor, the C15 compensation capacitor and the Y2 crystal oscillator are electrically connected. The digital tube driving circuit includes a U4 driving chip, a C17 filter capacitor, an SM1 three-digit digital tube and an SM2 three-digit digital tube, and the U4 driving chip, the C17 filter capacitor, the SM1 three-digit digital tube and the SM2 three-digit digital tube are electrically connected. The ADC circuit includes a P3 plug-in, a D1 diode, a D2 diode, a D3 diode, a D4 diode, an R11 sampling resistor, a C18 filter capacitor and a D3 voltage regulator diode, and the P3 plug-in, the D1 diode, the D2 diode, the D3 diode, the D4 diode, the R11 sampling resistor, the C18 filter capacitor and the D3 voltage regulator diode are electrically connected. The FLASH circuit includes a FLASH chip, a C16 filter capacitor and an R10 pull-up resistor, and the FLASH chip, the C16 filter capacitor and the R10 pull-up resistor are electrically connected.

[0006] To facilitate the improvement of the practicality of this device, the improvement of the present invention is that the main body of the detection device further includes a lithium battery charging circuit. The lithium battery charging circuit includes a U6 charging IC, a C23 filter capacitor, a C24 filter capacitor, an R20 configuration resistor, an R23 configuration resistor, an R22 configuration resistor, an R21 configuration resistor, a C25 time configuration capacitor, a P6 lithium battery interface, and an R13 filter bead. The U6 charging IC, the C23 filter capacitor, the C24 filter capacitor, the R20 configuration resistor, the R23 configuration resistor, the R22 configuration resistor, the R21 configuration resistor, the C25 time configuration capacitor, the P6 lithium battery interface, and the R13 filter bead are electrically connected.

[0007] To facilitate the improvement of the practicality of this device, the improvement of the present invention is that the lithium battery charging circuit is further provided with an R18 current-limiting resistor and a DS1 LED lamp. The R18 current-limiting resistor, the DS1 LED lamp, and the lithium battery charging circuit are electrically connected.

[0008] To facilitate the improvement of the practicality of this device, the improvement of the present invention is that the power supply circuit is further provided with a C20 filter capacitor, a C21 filter capacitor, and a C22 filter capacitor. The C20 filter capacitor, the C21 filter capacitor, the C22 filter capacitor, and the power supply circuit are electrically connected.

[0009] To facilitate the improvement of the practicality of this device, the improvement of the present invention is that the main body of the monitoring device further includes a power supply switching circuit. The power supply switching circuit includes an R15 current-limiting resistor, an R17 current-limiting resistor, a BG1 triode, a BG2 triode, a Q1 triode, an R14 pull-up resistor, and an R16 pull-up resistor. The R15 current-limiting resistor, the R17 current-limiting resistor, the BG1 triode, the BG2 triode, the Q1 triode, the R14 pull-up resistor, and the R16 pull-up resistor are electrically connected. The BG1 triode, the BG2 triode, and the Q1 triode are all NPN triodes.

[0010] To facilitate the improvement of the practicality of this device, the improvement of the present invention is that the power supply switching circuit is further provided with an R19 pull-down resistor. The R19 pull-down resistor is electrically connected to the power supply switching circuit.

[0011] To facilitate the improvement of the practicality of this device, the improvement of the present invention is that the LoRa circuit is further provided with a 4PIN terminal port and an IPEX interface. The 4PIN terminal port, the IPEX interface, and the LoRa circuit are electrically connected.

[0012] To facilitate the improvement of the practicality of this device, the improvement of the present invention is that the D3 voltage regulator tube is a 5V voltage regulator tube.

[0013] To facilitate the improvement of the practicality of this device, the improvement of the present invention is that the D6 voltage regulator tube is a 6.8V voltage regulator tube.

[0014] To facilitate the improvement of the practicality of this device, the present invention has the following improvements: the R15 current-limiting resistor and the R17 current-limiting resistor are respectively the collector current-limiting of the 3.9V voltage regulator diode D7 and the BG2 triode.

[0015] (III) Beneficial Effects Compared with the prior art, the present invention provides an on-line monitoring device for lightning arresters, which has the following beneficial effects: This on-line monitoring device for lightning arresters communicates with the host computer through the setting of the LoRa wireless communication module. On the one hand, it solves the problem of communication distance and can form a long-distance network; on the other hand, it supports parallel processing of multiple channels and multiple data rates.

[0016] This on-line monitoring device for lightning arresters adds a display module to display the current on the lightning arrester collected in real time. The displayed current parameters can be configured through LoRa. At the same time, a storage module is added to store the data collected over a period of time.

[0017] This on-line monitoring device for lightning arresters adds a power supply switching module, enabling it to continue working when the power grid is abnormal. Description of the Drawings

[0018] Figure 1 It is the power supply circuit diagram of the present invention; Figure 2 It is the lithium battery charging circuit diagram of the present invention; Figure 3 It is the power supply switching circuit diagram of the present invention; Figure 4 It is the LoRa circuit diagram of the present invention; Figure 5 It is the MCU loop circuit diagram of the present invention; Figure 6 It is the RTC loop circuit diagram of the present invention; Figure 7 It is the digital tube drive loop circuit diagram of the present invention; Figure 8 It is the ADC loop circuit diagram of the present invention; Figure 9 It is the FLASH loop circuit diagram of the present invention; Detailed Embodiments

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1-9 , the on-line monitoring device for lightning arrester, including the main body of the monitoring device. The main body of the monitoring device is composed of a power supply circuit, a LoRa circuit, an MCU circuit, an RTC circuit, a digital tube driving circuit, an ADC circuit and a FLASH circuit. The power supply circuit includes a P4 input port, an FA1 fuse, an R12 varistor, a P5 power module, a C19 aluminum electrolytic capacitor, a D6 voltage regulator diode and a U5 power chip. The P4 input port, the FA1 fuse, the R12 varistor, the P5 power module, the C19 aluminum electrolytic capacitor, the D6 voltage regulator diode and the U5 power chip are electrically connected. The LoRa circuit includes a LoRa module, an R1 pull-up resistor, a C1 filter capacitor and an R2 pull-up resistor. The LoRa module, the R1 pull-up resistor, the C1 filter capacitor and the R2 pull-up resistor are electrically connected. The MCU circuit includes an MCU chip, a C4 filter capacitor, a C9 filter capacitor, a C10 filter capacitor, a C11 filter capacitor, a C12 filter capacitor, a C13 filter capacitor, a C2 compensation capacitor, a C3 compensation capacitor, a Y1 crystal oscillator, an R9 pull-up resistor, a C5 filter capacitor, an R3 pull-up resistor, an R4 pull-up resistor, a P2 programming port, an R6 pull-up resistor, an R7 pull-up resistor, an R8 pull-up resistor, a C6 filter capacitor, a C7 filter capacitor and a C8 filter capacitor. The MCU chip, the C4 filter capacitor, the C9 filter capacitor, the C10 filter capacitor, the C11 filter capacitor, the C12 filter capacitor, the C13 filter capacitor, the C2 compensation capacitor, the C3 compensation capacitor, the Y1 crystal oscillator, the R9 pull-up resistor, the C5 filter capacitor, the R3 pull-up resistor, the R4 pull-up resistor, the P2 programming port, the R6 pull-up resistor, the R7 pull-up resistor, the R8 pull-up resistor, the C6 filter capacitor, the C7 filter capacitor and the C8 filter capacitor are electrically connected. The RTC circuit includes a C14 compensation capacitor, a C15 compensation capacitor and a Y2 crystal oscillator. The C14 compensation capacitor, the C15 compensation capacitor and the Y2 crystal oscillator are electrically connected. The digital tube driving circuit includes a U4 driving chip, a C17 filter capacitor, an SM1 three-digit digital tube and an SM2 three-digit digital tube. The U4 driving chip, the C17 filter capacitor, the SM1 three-digit digital tube and the SM2 three-digit digital tube are electrically connected. The ADC circuit includes a P3 plug-in, a D1 diode, a D2 diode, a D3 diode, a D4 diode, an R11 sampling resistor, a C18 filter capacitor and a D3 voltage regulator diode. The P3 plug-in, the D1 diode, the D2 diode, the D3 diode, the D4 diode, the R11 sampling resistor, the C18 filter capacitor and the D3 voltage regulator diode are electrically connected. The FLASH circuit includes a FLASH chip, a C16 filter capacitor and an R10 pull-up resistor. The FLASH chip, the C16 filter capacitor and the R10 pull-up resistor are electrically connected.

[0021] Further, the main body of the detection device further includes a lithium battery charging circuit, and the lithium battery charging circuit includes a U6 charging IC, a C23 filter capacitor, a C24 filter capacitor, an R20 configuration resistor, an R23 configuration resistor, an R22 configuration resistor, an R21 configuration resistor, a C25 time configuration capacitor, a P6 lithium battery interface, and an R13 filter bead. The U6 charging IC, the C23 filter capacitor, the C24 filter capacitor, the R20 configuration resistor, the R23 configuration resistor, the R22 configuration resistor, the R21 configuration resistor, the C25 time configuration capacitor, the P6 lithium battery interface, and the R13 filter bead are electrically connected, facilitating the increase of the practicality of this device.

[0022] Further, the lithium battery charging circuit is further provided with an R18 current limiting resistor and a DS1 LED lamp. The R18 current limiting resistor, the DS1 LED lamp, and the lithium battery charging circuit are electrically connected, facilitating the increase of the practicality of this device.

[0023] Further, the power supply circuit is further provided with a C20 filter capacitor, a C21 filter capacitor, and a C22 filter capacitor. The C20 filter capacitor, the C21 filter capacitor, the C22 filter capacitor, and the power supply circuit are electrically connected, facilitating the increase of the practicality of this device.

[0024] Further, the main body of the monitoring device further includes a power supply switching circuit, and the power supply switching circuit includes an R15 current limiting resistor, an R17 current limiting resistor, a BG1 triode, a BG2 triode, a Q1 triode, an R14 pull-up resistor, and an R16 pull-up resistor. The R15 current limiting resistor, the R17 current limiting resistor, the BG1 triode, the BG2 triode, the Q1 triode, the R14 pull-up resistor, and the R16 pull-up resistor are electrically connected. The BG1 triode, the BG2 triode, and the Q1 triode are all NPN triodes, facilitating the increase of the practicality of this device.

[0025] Further, the power supply switching circuit is further provided with an R'19 pull-down resistor. The R19 pull-down resistor is electrically connected to the power supply switching circuit, facilitating the increase of the practicality of this device.

[0026] Further, the LoRa circuit is further provided with a 4PIN terminal port and an IPEX interface. The 4PIN terminal port, the IPEX interface, and the LoRa circuit are electrically connected, facilitating the increase of the practicality of this device.

[0027] Further, the D3 voltage regulator tube is a 5V voltage regulator tube, facilitating the increase of the practicality of this device.

[0028] Further, the D6 voltage regulator tube is a 6.8V voltage regulator tube, facilitating the increase of the practicality of this device.

[0029] Further, the R15 current-limiting resistor and the R17 current-limiting resistor are respectively the collector current limits of the 3.9V voltage regulator diode D7 and the BG2 triode, which is convenient for increasing the practicability of the device.

[0030] In summary, when in use, the on-line monitoring device for lightning arresters converts the commercial power into direct current through the power supply circuit, providing a DC 5V power supply and a DC 3.3V power supply for the whole machine. The FA1 fuse can prevent subsequent components from being burned out due to excessive current inflow. The R12 varistor plays a voltage stabilizing role to prevent the system from breaking down the backend circuit due to excessive instantaneous voltage. The P5 power supply module is used to convert the input commercial power into DC 5V power supply. The C19 aluminum electrolytic capacitor is used for filtering. The U5 power supply chip converts the DC 5V input power supply into an output DC 3.3V power supply. The C20 filter capacitor, C21 filter capacitor and C22 filter capacitor are used for filtering the input and output pins of the chip IC. The lithium battery charging circuit is used to charge the lithium battery. The R20 configuration resistor and R23 configuration resistor provide a bias voltage for the internal loop of the IC. Through the setting of the R18 current limiting resistor and the DS1 LED lamp, the LED lamp lights up when the lithium battery is charged. The R22 configuration resistor is used to configure the charging current, and the R21 configuration resistor is used to configure the charging threshold. The R13 filter bead connects the negative pole of the lithium battery to the ground in the loop. Through the power supply switching circuit, when the external power supply is abnormal, the loop is switched to the built-in lithium battery to continue power supply. Through the R19 pull-down resistor, it is ensured that the base signal of the triode BG1 is low when there is no signal input. The triode BG1 and the triode BG2 are used as switching tubes, and the triode Q1 is used as a switching tube. When conducting, the power supply in the loop is supplied by the lithium battery. Through the LoRa circuit, the conversion between LoRa signals and UART signals is realized, and wireless signals are input and output to the outside through the antenna port. The high-level reset loop composed of the R1 pull-up resistor and the C1 filter capacitor is used to reset the LoRa module. The R2 pull-up resistor is used to wake up the LoRa module. The 4PIN terminal port is used to configure the LoRa module. The IPEX interface can access the antenna through a patch cord. The MCU loop is the core of this device, realizing functions such as external communication, data conversion, and peripheral control. Among them, the MCU chip is the core of the whole machine. The C4 filter capacitor, C9 filter capacitor, C10 filter capacitor, C11 filter capacitor, C12 filter capacitor and C13 filter capacitor respectively filter the power supply pins and programming interfaces of the MCU chip; The C2 compensation capacitor and the C3 compensation capacitor are used in conjunction with the crystal oscillator of Y1; The power-on reset circuit is formed by the combination of the R9 pull-up resistor and the C5 filter capacitor; The R3 pull-up resistor and the R4 pull-up resistor are used for programming the JTAG port of the MCU chip;The pull-up resistors R6, R7, R8, the filtering capacitors C6, C7, and C8 are used to drive the digital tube driving IC. The RTC circuit is a real-time clock circuit. Among them, the compensation capacitors C14 and C15 are used in conjunction with the crystal oscillator Y2. The driving and display of the digital tube are realized through the digital tube driving circuit. The digital tube driving chip U4 is used to drive the digital tube. The three-digit digital tube SM1 displays the number of times the current flowing through the lightning arrester is collected, and the three-digit digital tube SM2 displays the current flowing through the lightning arrester most recently. The conversion of the collected AC current signal into a DC voltage signal is realized through the ADC circuit. The conversion of the collected AC current signal into a DC voltage signal is realized through the ADC circuit. Among them, the P3 plug is externally connected, and the diodes D1, D2, D3, and D4 use a full-bridge rectification method to convert the AC signal into a DC signal; the sampling resistor R11 converts the current signal into a voltage signal, and the voltage stabilizing diode D3 is used to protect the voltage input to the pin of the MCU chip to be clamped at 5V. The storage of data is realized through the FLASH circuit, and data is stored through the FLASH chip. The write protection function of the IC is invalidated through the pull-up resistor R10.;

[0031] In the description of this article, it should be noted that relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. On-line monitoring device for lightning arrester, comprising a main body of the monitoring device, characterized in that: The main body of the monitoring device consists of a power supply circuit, a LoRa circuit, an MCU circuit, an RTC circuit, a digital tube driving circuit, an ADC circuit, and a FLASH circuit. The power supply circuit includes a P4 input port, an FA1 fuse, an R12 varistor, a P5 power module, a C19 aluminum electrolytic capacitor, a D6 voltage regulator diode, and a U5 power chip. The P4 input port, FA1 fuse, R12 varistor, P5 power module, C19 aluminum electrolytic capacitor, D6 voltage regulator diode, and U5 power chip are electrically connected. The LoRa circuit includes a LoRa module, an R1 pull-up resistor, a C1 filter capacitor, and an R2 pull-up resistor. The LoRa module, R1 pull-up resistor, C1 filter capacitor, and R2 pull-up resistor are electrically connected. The MCU circuit includes an MCU chip, a C4 filter capacitor, a C9 filter capacitor, a C10 filter capacitor, a C11 filter capacitor, a C12 filter capacitor, a C13 filter capacitor, a C2 compensation capacitor, a C3 compensation capacitor, a Y1 crystal oscillator, an R9 pull-up resistor, a C5 filter capacitor, an R3 pull-up resistor, an R4 pull-up resistor, a P2 programming port, an R6 pull-up resistor, an R7 pull-up resistor, an R8 pull-up resistor, a C6 filter capacitor, a C7 filter capacitor, and a C8 filter capacitor. The MCU chip, C4 filter capacitor, C9 filter capacitor, C10 filter capacitor, C11 filter capacitor, C12 filter capacitor, C13 filter capacitor, C2 compensation capacitor, C3 compensation capacitor, Y1 crystal oscillator, R9 pull-up resistor, C5 filter capacitor, R3 pull-up resistor, R4 pull-up resistor, P2 programming port, R6 pull-up resistor, R7 pull-up resistor, R8 pull-up resistor, C6 filter capacitor, C7 filter capacitor, and C8 filter capacitor are electrically connected. The RTC circuit includes a C14 compensation capacitor, a C15 compensation capacitor, and a Y2 crystal oscillator. The C14 compensation capacitor, C15 compensation capacitor, and Y2 crystal oscillator are electrically connected. The digital tube driving circuit includes a U4 driving chip, a C17 filter capacitor, an SM1 three-digit digital tube, and an SM2 three-digit digital tube. The U4 driving chip, C17 filter capacitor, SM1 three-digit digital tube, and SM2 three-digit digital tube are electrically connected. The ADC circuit includes a P3 plug-in, a D1 diode, a D2 diode, a D3 diode, a D4 diode, an R11 sampling resistor, a C18 filter capacitor, and a D3 voltage regulator diode. The P3 plug-in, D1 diode, D2 diode, D3 diode, D4 diode, R11 sampling resistor, C18 filter capacitor, and D3 voltage regulator diode are electrically connected. The FLASH circuit includes a FLASH chip, a C16 filter capacitor, and an R10 pull-up resistor. The FLASH chip, C16 filter capacitor, and R10 pull-up resistor are electrically connected.

2. The on-line monitoring device for lightning arresters according to claim 1, characterized in that: The main body of the detection device further includes a lithium battery charging circuit, which includes a U6 charging IC, a C23 filter capacitor, a C24 filter capacitor, an R20 configuration resistor, an R23 configuration resistor, an R22 configuration resistor, an R21 configuration resistor, a C25 time configuration capacitor, a P6 lithium battery interface, and an R13 filter bead. The U6 charging IC, the C23 filter capacitor, the C24 filter capacitor, the R20 configuration resistor, the R23 configuration resistor, the R22 configuration resistor, the R21 configuration resistor, the C25 time configuration capacitor, the P6 lithium battery interface, and the R13 filter bead are electrically connected.

3. The arrester on-line monitoring device according to claim 2, characterized in that: The lithium battery charging circuit is further provided with an R18 current-limiting resistor and a DS1 LED lamp, and the R18 current-limiting resistor, the DS1 LED lamp, and the lithium battery charging circuit are electrically connected.

4. The arrester on-line monitoring device according to claim 3, characterized in that: The power supply circuit is further provided with a C20 filter capacitor, a C21 filter capacitor, and a C22 filter capacitor, and the C20 filter capacitor, the C21 filter capacitor, the C22 filter capacitor, and the power supply circuit are electrically connected.

5. The arrester on-line monitoring device according to claim 4, wherein: The main body of the monitoring device further includes a power supply switching circuit, which includes an R15 current-limiting resistor, an R17 current-limiting resistor, a BG1 triode, a BG2 triode, a Q1 triode, an R14 pull-up resistor, and an R16 pull-up resistor. The R15 current-limiting resistor, the R17 current-limiting resistor, the BG1 triode, the BG2 triode, the Q1 triode, the R14 pull-up resistor, and the R16 pull-up resistor are electrically connected. The BG1 triode, the BG2 triode, and the Q1 triode are all NPN triodes.

6. The on-line monitoring device for arrester according to claim 5, wherein: The power supply switching circuit is further provided with an R19 pull-down resistor, and the R19 pull-down resistor is electrically connected to the power supply switching circuit.

7. The on-line monitoring device for arrester according to claim 6, characterized in that: The LoRa circuit is further provided with a 4PIN terminal port and an IPEX interface, and the 4PIN terminal port, the IPEX interface, and the LoRa circuit are electrically connected.

8. The on-line monitoring device for arrester according to claim 7, characterized in that: The D3 voltage regulator tube is a 5V voltage regulator tube.

9. The on-line monitoring device for arrester according to claim 8, characterized in that: The D6 voltage regulator tube is a 6.8V voltage regulator tube.

10. The on-line monitoring device for lightning arrester according to claim 9, characterized in that: The R15 current-limiting resistor and the R17 current-limiting resistor are respectively the collector current limits of the 3.9V voltage regulator tube D7 and the BG2 triode.

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