A high-precision voltmeter with a high-voltage circuit overload protection structure

Abstract

The present invention discloses a high-precision voltmeter with a high-voltage circuit overload protection structure, including a carrying mechanism, an intelligent identification mechanism, and a high-voltage overload protection mechanism. The high-voltage overload protection mechanism is fixedly connected inside the carrying mechanism, and the intelligent identification mechanism is fixedly connected inside the carrying mechanism. In the present invention, through the integrated intelligent overload warning and protection system, it can monitor the voltage and current changes in real time, conduct data analysis by combining intelligent algorithms, and identify potential overload risks in advance. Once an overload signal is detected, the system can respond quickly, cut off the overload path by quickly switching the circuit, and cooperate with the transient energy release. When an overload occurs, it can quickly capture and safely release the transient energy, avoiding the waste of energy and the impact on the equipment, protecting the key electronic components in the circuit from being damaged by transient impacts such as overvoltage and overcurrent, and effectively preventing the occurrence of safety accidents such as equipment damage and fires.

Description

Technical Field

[0001] The present invention relates to the technical field of voltmeter overload protection, and specifically to a high-precision voltmeter with a high-voltage circuit overload protection structure. Background Technique

[0002] With the rapid development of the times, people use electrical appliances, electronic products, etc. more and more commonly, and these electrical appliances and electronic products are inseparable from power sources, which makes people pay more attention to power safety. In order to ensure the safety of electricity use, people set overload current protection devices in the circuit.

[0003] A prior art high-precision voltmeter with a high-voltage circuit overload protection structure, with the application number 202022912138.2, includes a liquid crystal display screen on the side of the voltmeter housing, a speaker below the liquid crystal display screen, a first support base at the bottom end inside the voltmeter housing, a controller at the top of the first support base, another side of the voltmeter housing is connected to a detection and protection housing, wiring openings are symmetrically arranged at the top and bottom ends of the detection and protection housing, a connection through hole is arranged at the connection between the detection and protection housing and the voltmeter housing, a second support base is arranged at the bottom end inside the detection and protection housing, a fuse protection device is arranged at the bottom end of the second support base, the fuse protection device is composed of an insulating housing, a ceramic package, a glass housing, an arc extinguishing spring, a connecting piece and a fuse, and a high-voltage test instrument is arranged beside the fuse protection device. The above-mentioned high-precision voltmeter with a high-voltage circuit overload protection structure has a simple device structure, fast power-off, very high safety, and good practicability.

[0004] However, the prior art still has the following deficiencies. First, when the above-mentioned device is in use, a high-voltage test instrument is arranged beside the fuse protection device. When the fuse melts, the energy in the circuit will not be immediately released, generating an arc. At this time, the distance between the arc extinguishing spring and the fuse is widened by the pulling back of the arc extinguishing spring, playing a role in extinguishing the arc and quickly cutting off the power. However, although the above-mentioned device can immediately cut off the circuit when it detects an abnormal increase in voltage or current, it cannot safely release the transient energy, which easily leads to equipment damage and fire risks. Therefore, it is very necessary to design a high-precision voltmeter with a high-voltage circuit overload protection structure that can release transient energy. Summary of the Invention

[0005] The purpose of the present invention is to provide a high-precision voltmeter with a high-voltage circuit overload protection structure to solve the problems raised in the above background technique.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: A high-precision voltmeter with a high-voltage circuit overload protection structure, comprising a bearing mechanism, an intelligent recognition mechanism, and a high-voltage overload protection mechanism. The high-voltage overload protection mechanism is fixedly connected to the inside of the bearing mechanism, and the intelligent recognition mechanism is fixedly connected to the inside of the bearing mechanism.

[0007] The high-voltage overload protection mechanism includes a fuse protection unit and a transient energy release unit. The fuse protection unit is fixedly connected to the inside of the bearing mechanism, and the transient energy release unit is fixedly connected to the inside of the bearing mechanism.

[0008] According to the above technical solutions, the bearing mechanism is composed of a housing, a control panel, a display screen, a mounting block, a back plate, a back plate connecting plate, and a circuit interface. The control panel is fixedly connected to the surface of the housing, the display screen is fixedly connected to the surface of the housing, the mounting block is fixedly connected to the side of the housing, the back plate is threadedly connected to the surface of the back plate connecting plate, the back plate connecting plate is fixedly connected to the back of the housing, and the circuit interface is fixedly connected to the bottom of the housing, playing a major role in bearing, interaction, and convenient installation.

[0009] According to the above technical solutions, the intelligent recognition mechanism is composed of a quantum point contact sensor, a signal conditioning circuit, a mounting frame, a high-precision analog-to-digital converter, a digital signal processor, a microcontroller, an electrical interface, a digital display, a control circuit board, an access wire, and a first transmission wire. The quantum point contact sensor is fixedly connected to the inner bottom of the housing, the signal conditioning circuit is fixedly connected to the top of the quantum point contact sensor, the mounting frame is fixedly connected to the inside of the housing, the high-precision analog-to-digital converter is fixedly connected to the inside of the mounting frame, the digital signal processor is fixedly connected to the surface of the high-precision analog-to-digital converter, the microcontroller is fixedly connected to the top of the signal conditioning circuit, the electrical interface is fixedly connected to the surface of the microcontroller, the digital display is fixedly connected to the inner wall of the housing, the control circuit board is fixedly connected to the inner wall of the housing, the access wire is electrically connected to the signal conditioning circuit and the high-precision analog-to-digital converter, the first transmission wire is electrically connected to the digital signal processor and the microcontroller, and the microcontroller is electrically connected to the digital display and the control circuit board. It adopts QPC sensor technology and combines deep learning algorithms for signal optimization to achieve high-precision voltage measurement. The QPC sensor ensures accurate capture of voltage changes even in complex electromagnetic environments with its extremely high sensitivity and stability, and at the same time filters, calibrates, and linearizes digital signals to ensure recognition accuracy.

[0010] According to the above technical solution, the fuse protection unit consists of a connection plate, an electrical connection socket, a second transmission wire, a solid-state relay, an electrical connection plug, an insulator, an arc extinguishing spring, a connecting piece, a fuse and a safety release port. The connection plate is fixedly connected to the inside of the housing. The electrical connection socket is fixedly connected to the back of the connection plate. The second transmission wire is electrically connected to the electrical connection socket and the microcontroller. The solid-state relay is fixedly connected to the surface of the electrical connection socket. The electrical connection plug is fixedly connected to the left and right ends of the second transmission wire and is inserted into the electrical interface and the inside of the electrical connection socket. The insulator is fixedly connected to the front of the connection plate. The arc extinguishing spring is fixedly connected to the inside of the insulator. The connecting piece is fixedly connected between the arc extinguishing springs. The fuse is fixedly connected to the inside of the connecting piece. The safety release port is fixedly connected to the bottom of the connecting piece. It can combine a high-speed ADC and an intelligent algorithm to monitor the current and voltage changes in the circuit in real time. Once an abnormality is detected, it immediately triggers an early warning mechanism and activates the fuse protection device to protect the equipment and reduce potential safety hazards.

[0011] According to the above technical solution, the transient energy release unit consists of a support rod, a bearing mounting frame, a release motor, an output shaft and an energy converter. The support rod is fixedly connected to the inside of the housing. The bearing mounting frame is fixedly connected to the top of the support rod. The release motor is fixedly connected to the top of the bearing mounting frame. The output shaft is rotatably connected to the side of the release motor. The energy converter is fixedly connected between the release motor and the safety release port. The transient energy is safely released through the energy conversion device, and the energy is quickly released through the release motor to avoid safety accidents such as fires caused by energy accumulation.

[0012] According to the above technical solution, the display screen is electrically connected to the digital display, and the control panel is electrically connected to the control circuit board, which facilitates human-machine interaction, meets the usage requirements, has an intuitive and easy-to-use interface design, and supports graphical data display and historical data query.

[0013] According to the above technical solution, the energy converter is electrically connected to the release motor. When it is detected that the voltage or current abnormally increases, the system not only immediately cuts off the circuit, but also safely releases the transient energy through the energy conversion device. The transient energy conversion and release have unique transient characteristics, that is, it can quickly realize the conversion and release of energy to prevent the generation of potential safety hazards.

[0014] According to the above technical solution, the signal conditioning circuit is provided with a two-path power output. One path is connected to the fuse protection unit, and the other path is connected to the digital display, which facilitates the display and control output of signals in the normal state. At the same time, it can transmit abnormal signals, trigger the protection mechanism in time, and prevent equipment damage and fire risks.

[0015] According to the above technical solution, the electrical connection socket is electrically connected to the arc extinguishing spring. Once the device measures an overload signal, it immediately triggers a protection mechanism to cut off the circuit.

[0016] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0017] 1. In the present invention, through the design of the transient energy management and release module, transient energy can be quickly captured and safely released when an overload occurs, avoiding energy waste and equipment impact. This energy management strategy not only helps protect the equipment from damage but also improves the overall energy efficiency of the system, promotes the rational use of energy, and enhances the safety and reliability of the power system.

[0018] 2. In the present invention, through the integrated intelligent overload warning and protection system, the voltage and current changes can be monitored in real time, and data analysis is carried out in combination with intelligent algorithms to identify potential overload risks in advance. Once an overload signal is detected, the system can respond quickly, cut off the overload path by quickly switching the circuit, and cooperate with the transient energy release to effectively prevent the occurrence of safety accidents such as equipment damage and fires.

[0019] 3. In the present invention, through the transient energy safety release mechanism, energy can be quickly dispersed or absorbed when a transient phenomenon occurs, thereby protecting the key electronic components in the circuit from damage caused by transient impacts such as overvoltage and overcurrent. This helps extend the service life of the components and improve the overall reliability of the system. By releasing transient energy in a timely manner, chain reactions caused by transient phenomena, such as voltage fluctuations and current mutations, can be prevented, and these chain reactions may cause more serious damage to the system.

[0020] 4. In the present invention, through the transient energy safety release mechanism, transient energy can be converted into a harmless form and released, reducing the impact of transient phenomena on the system. The transient energy safety release helps maintain the stable operation of the system, optimize the system performance, improve the overall efficiency of the system, and reduce problems such as possible circuit short circuits and equipment overheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0022] Figure 1 is a schematic diagram of the external structure of the present invention;

[0023] Figure 2 is a schematic diagram of the rear view structure of the present invention;

[0024] Figure 3 is a schematic diagram of the backplane unfolded structure of the present invention;

[0025] Figure 4 It is a schematic diagram of the internal structure of the outer shell of the present invention;

[0026] Figure 5 It is a schematic diagram of the internal side view structure of the present invention;

[0027] Figure 6 It is the Figure 5 magnified structure schematic diagram at position A in the present invention;

[0028] Figure 7 It is a schematic diagram of the intelligent identification mechanism structure of the present invention.

[0029] In the figure: 1. Carrying mechanism; 101. Outer shell; 102. Control panel; 103. Display screen; 104. Mounting block; 105. Back panel; 106. Back panel connecting plate; 107. Circuit interface; 2. Intelligent identification mechanism; 201. Quantum dot contact sensor; 202. Signal conditioning circuit; 203. Mounting bracket; 204. High-precision analog-to-digital converter; 205. Digital signal processor; 206. Microcontroller; 207. Electrical interface; 208. Digital display; 209. Control circuit board; 210. Access wire; 211. First transmission wire; 3. High-voltage overload protection mechanism; 301. Connecting plate; 302. Electrical contact socket; 303. Second transmission wire; 304. Solid-state relay; 305. Electrical contact plug; 306. Insulator; 307. Arc extinguishing spring; 308. Connector; 309. Fuse; 310. Safety release port; 311. Support rod; 312. Carrying mounting bracket; 313. Release motor; 314. Output shaft; 315. Energy converter. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figure 1-7 , the present invention provides a technical solution: a high-precision voltmeter with a high-voltage circuit overload protection structure, including a carrying mechanism 1, an intelligent identification mechanism 2, and a high-voltage overload protection mechanism 3. The high-voltage overload protection mechanism 3 is fixedly connected to the inside of the carrying mechanism 1, and the intelligent identification mechanism 2 is fixedly connected to the inside of the carrying mechanism 1.

[0032] The high-voltage overload protection mechanism 3 includes a fuse protection unit and a transient energy release unit. The fuse protection unit is fixedly connected to the inside of the carrying mechanism 1, and the transient energy release unit is fixedly connected to the inside of the carrying mechanism 1.

[0033] The carrier mechanism 1 is composed of a housing 101, a control panel 102, a display screen 103, a mounting block 104, a backplane 105, a backplane connecting plate 106, and a circuit interface 107. The control panel 102 is fixedly connected to the surface of the housing 101, the display screen 103 is fixedly connected to the surface of the housing 101, and the display screen 103 is electrically connected to the digital display 208 for the user to view in real time. The control panel 102 is electrically connected to the control circuit board 209 to facilitate human-computer interaction and meet the usage requirements. The interface design is intuitive and easy to use, supporting graphical data display and historical data query. The mounting block 104 is fixedly connected to the side of the housing 101, the backplane 105 is threadedly connected to the surface of the backplane connecting plate 106, the backplane connecting plate 106 is fixedly connected to the back of the housing 101, and the circuit interface 107 is fixedly connected to the bottom of the housing 101, playing a major role in carrying, interacting, and facilitating installation.

[0034] The intelligent recognition mechanism 2 is composed of a quantum point contact sensor 201, a signal conditioning circuit 202, a mounting bracket 203, a high-precision analog-to-digital converter 204, a digital signal processor 205, a microcontroller 206, an electrical interface 207, a digital display 208, a control circuit board 209, an access wire 210, and a first transmission wire 211. The quantum point contact sensor 201 is fixedly connected to the inner bottom of the housing 101 and can accurately capture the voltage signal in the circuit and convert the voltage signal into an electrical signal for output. The signal conditioning circuit 202 is fixedly connected to the top of the quantum point contact sensor 201 and amplifies, filters, and linearizes the electrical signal to ensure the accuracy and stability of the signal. The signal conditioning circuit 202 is provided with a two-path power output, one path is connected to the fuse protection unit, and the other path is connected to the digital display 208, facilitating the display and control output of the signal under normal conditions and being able to transmit abnormal signals, capable of promptly triggering the protection mechanism to prevent equipment damage and fire risks. The mounting bracket 203 is fixedly connected to the inside of the housing 101, and the high-precision analog-to-digital converter 204 is fixedly connected to the inside of the mounting bracket 203, facilitating the conversion of the electrical signal into a digital signal. The digital signal processor 205 is fixedly connected to the surface of the high-precision analog-to-digital converter 204, facilitating the processing of the digital signal, optimizing the signal, removing noise and interference, and improving the measurement accuracy. The microcontroller 206 is fixedly connected to the top of the signal conditioning circuit 202, the electrical interface 207 is fixedly connected to the surface of the microcontroller 206, the digital display 208 is fixedly connected to the inner wall of the housing 101, the control circuit board 209 is fixedly connected to the inner wall of the housing 101, the access wire 210 is electrically connected to the signal conditioning circuit 202 and the high-precision analog-to-digital converter 204, the first transmission wire 211 is electrically connected to the digital signal processor 205 and the microcontroller 206, and the microcontroller 206 is electrically connected to the digital display 208 and the control circuit board 209. Using QPC sensor technology and combining deep learning algorithms for signal optimization to achieve high-precision voltage measurement. The QPC sensor, with its extremely high sensitivity and stability, ensures accurate capture of voltage changes even in complex electromagnetic environments. At the same time, the digital signal is filtered, calibrated, and linearized to ensure the recognition accuracy. It can monitor voltage and current changes in real time, perform data analysis by combining intelligent algorithms, and identify potential overload risks in advance. Once an overload signal is detected, the system can respond quickly, cut off the overload path by quickly switching the circuit, and cooperate with transient energy release to effectively prevent the occurrence of safety accidents such as equipment damage and fire.

[0035] The fuse protection unit consists of a connection plate 301, an electrical connection socket 302, a second transmission wire 303, a solid-state relay 304, an electrical connection plug 305, an insulator 306, an arc extinguishing spring 307, a connecting piece 308, a fuse 309, and a safety release port 310. The connection plate 301 is fixedly connected to the inside of the housing 101. The electrical connection socket 302 is fixedly connected to the back of the connection plate 301. The electrical connection socket 302 is electrically connected to the arc extinguishing spring 307, enabling the device to immediately trigger the protection mechanism and cut off the circuit once an overload signal is measured. The second transmission wire 303 is electrically connected to the electrical connection socket 302 and the microcontroller 206. The solid-state relay 304 is fixedly connected to the surface of the electrical connection socket 302. The electrical connection plug 305 is fixedly connected to the left and right ends of the second transmission wire 303 and is inserted into the electrical interface 207 and the inside of the electrical connection socket 302. The insulator 306 is fixedly connected to the front of the connection plate 301. The arc extinguishing spring 307 is fixedly connected to the inside of the insulator 306. The connecting piece 308 is fixedly connected between the arc extinguishing springs 307. The fuse 309 is fixedly connected to the inside of the connecting piece 308. The safety release port 310 is fixedly connected to the bottom of the connecting piece 308, which can combine a high-speed ADC and intelligent algorithms to monitor the current and voltage changes in the circuit in real time. Once an abnormality is detected, it immediately triggers the warning mechanism and activates the fuse protection device to protect the equipment and reduce potential safety hazards. The transient energy release unit consists of a support rod 311, a bearing mounting frame 312, a release motor 313, an output shaft 314, and an energy converter 315. The support rod 311 is fixedly connected to the inside of the housing 101. The bearing mounting frame 312 is fixedly connected to the top of the support rod 311. The release motor 313 is fixedly connected to the top of the bearing mounting frame 312. The output shaft 314 is rotatably connected to the side of the release motor 313. The energy converter 315 is fixedly connected between the release motor 313 and the safety release port 310. The energy converter 315 is electrically connected to the release motor 313, facilitating the system to not only immediately cut off the circuit when the voltage or current is detected to rise abnormally but also safely release the transient energy through the energy conversion device. The transient energy conversion and release have unique transient characteristics, that is, it can quickly realize the conversion and release of energy to prevent potential safety hazards, safely release the transient energy through the energy conversion device, and quickly release the energy through the release motor 313 to avoid safety accidents such as fires caused by energy accumulation. The transient energy safety release mechanism can quickly disperse or absorb the energy when the transient phenomenon occurs, thus protecting the key electronic components in the circuit from damage caused by transient impacts such as overvoltage and overcurrent, which helps to extend the service life of the components and improve the overall reliability of the system.

[0036] In use, when current enters the quantum dot contact sensor 201, it precisely captures the voltage signal in the circuit and converts the voltage signal into an electrical signal for output. The electrical signal is sent to the signal conditioning circuit 202 for amplification, filtering, and linearization processing to ensure the accuracy and stability of the signal. The amplified analog signal is converted into a digital signal by the high-precision analog-to-digital converter 204. The subsequent digital signal is processed by the digital signal processor 205 to optimize the signal, remove noise and interference, and improve the measurement accuracy. When the voltage is in a normal state, the digital signal is displayed on the display screen 103 for the user to view in real time. Once an overload signal is detected, the intelligent high-voltage overload protection system is immediately activated. The fast-response solid-state relay quickly melts the fuse to cut off the current, and the arc is quickly extinguished by the arc extinguishing spring. At the same time, the transient energy generated is converted by the energy converter 315 and safely released through the output of the release motor 313, so as to reduce problems such as possible circuit short circuits and equipment overheating.

[0037] It should be noted that in this article, 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 term "comprising", "including" or any other variant thereof is 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 elements inherent to such process, method, article or device.

[0038] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-precision voltmeter with a high-voltage circuit overload protection structure, comprising a bearing mechanism (1), an intelligent recognition mechanism (2) and a high-voltage overload protection mechanism (3), characterized in that: The high-voltage overload protection mechanism (3) is fixedly connected to the inside of the bearing mechanism (1), and the intelligent recognition mechanism (2) is fixedly connected to the inside of the bearing mechanism (1); The high-voltage overload protection mechanism (3) includes a fusing protection unit and a transient energy release unit. The fusing protection unit is fixedly connected to the inside of the bearing mechanism (1), and the transient energy release unit is fixedly connected to the inside of the bearing mechanism (1); The bearing mechanism (1) is composed of a housing (101), a control panel (102), a display screen (103), a mounting block (104), a back panel (105), a back panel connecting plate (106), and a circuit interface (107). The control panel (102) is fixedly connected to the surface of the housing (101), the display screen (103) is fixedly connected to the surface of the housing (101), the mounting block (104) is fixedly connected to the side of the housing (101), the back panel (105) is threadedly connected to the surface of the back panel connecting plate (106), the back panel connecting plate (106) is fixedly connected to the back of the housing (101), and the circuit interface (107) is fixedly connected to the bottom of the housing (101); The transient energy release unit is composed of a support rod (311), a bearing mounting frame (312), a release motor (313), an output shaft (314), and an energy converter (315). The support rod (311) is fixedly connected to the inside of the housing (101), the bearing mounting frame (312) is fixedly connected to the top of the support rod (311), the release motor (313) is fixedly connected to the top of the bearing mounting frame (312), the output shaft (314) is rotatably connected to the side of the release motor (313), and the energy converter (315) is fixedly connected between the release motor (313) and the safety release port (310); The energy converter (315) is electrically connected to the release motor (313).

2. The high-precision voltmeter with a high-voltage circuit overload protection structure according to claim 1, wherein: The intelligent recognition mechanism (2) consists of a quantum dot contact sensor (201), a signal conditioning circuit (202), a mounting bracket (203), a high-precision analog-to-digital converter (204), a digital signal processor (205), a microcontroller (206), an electrical interface (207), a digital display (208), a control circuit board (209), an access wire (210), and a first transmission wire (211). The quantum dot contact sensor (201) is fixedly connected to the inner bottom of the housing (101). The signal conditioning circuit (202) is fixedly connected to the top of the quantum dot contact sensor (201). The mounting bracket (203) is fixedly connected to the inside of the housing (101). The high-precision analog-to-digital converter (204) is fixedly connected to the inside of the mounting bracket (203). The digital signal processor (205) is fixedly connected to the surface of the high-precision analog-to-digital converter (204). The microcontroller (206) is fixedly connected to the top of the signal conditioning circuit (202). The electrical interface (207) is fixedly connected to the surface of the microcontroller (206). The digital display (208) is fixedly connected to the inner wall of the housing (101). The control circuit board (209) is fixedly connected to the inner wall of the housing (101). The access wire (210) is electrically connected to the signal conditioning circuit (202) and the high-precision analog-to-digital converter (204). The first transmission wire (211) is electrically connected to the digital signal processor (205) and the microcontroller (206). The microcontroller (206) is electrically connected to the digital display (208) and the control circuit board (209).

3. The high-precision voltmeter with a high-voltage circuit overload protection structure according to claim 2, characterized in that: The fuse protection unit consists of a connecting plate (301), an electrical connection socket (302), a second transmission wire (303), a solid-state relay (304), an electrical connection plug (305), an insulator (306), an arc extinguishing spring (307), a connecting member (308), a fuse (309), and a safety release port (310). The connecting plate (301) is fixedly connected to the inside of the housing (101). The electrical connection socket (302) is fixedly connected to the back of the connecting plate (301). The second transmission wire (303) is electrically connected to the electrical connection socket (302) and the microcontroller (206). The solid-state relay (304) is fixedly connected to the surface of the electrical connection socket (302). The electrical connection plugs (305) are fixedly connected to the left and right ends of the second transmission wire (303) and are inserted into the electrical interface (207) and the inside of the electrical connection socket (302). The insulator (306) is fixedly connected to the front of the connecting plate (301). The arc extinguishing spring (307) is fixedly connected to the inside of the insulator (306). The connecting members (308) are fixedly connected between the arc extinguishing springs (307). The fuse (309) is fixedly connected to the inside of the connecting member (308). The safety release port (310) is fixedly connected to the bottom of the connecting member (308).

4. A high-precision voltmeter with a high-voltage circuit overload protection structure according to claim 3, characterized in that: The display screen (103) is electrically connected to the digital display (208), and the control panel (102) is electrically connected to the control circuit board (209).

5. The high-precision voltmeter with a high-voltage circuit overload protection structure according to claim 4, characterized in that: The signal conditioning circuit (202) is provided with two-path power output, one path is connected to the fuse protection unit, and the other path is connected to the digital display (208).

6. The high-precision voltmeter with a high-voltage circuit overload protection structure according to claim 5, characterized in that: The electrical connector (302) is electrically connected to the arc extinguishing spring (307).

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