High-precision voltmeter with high-voltage circuit overload protection structure

Abstract

The invention discloses a high-precision voltmeter with a high-voltage circuit overload protection structure, which comprises a bearing mechanism, an intelligent identification mechanism and a high-voltage overload protection mechanism, and is characterized in that the high-voltage overload protection mechanism is fixedly connected to the interior of the bearing mechanism, and the intelligent identification mechanism is fixedly connected to the interior of the bearing mechanism. According to the invention, through the integrated intelligent overload early warning and protection system, voltage and current changes can be monitored in real time, data analysis is carried out in combination with an intelligent algorithm, potential overload risks are identified in advance, once an overload signal is detected, the system can rapidly respond, an overload path is cut off through a rapid switching circuit, and transient energy is released for use. According to the overload protection circuit, transient energy can be rapidly captured and safely released when overload occurs, energy waste and equipment impact are avoided, key electronic elements in the circuit are protected from being damaged by transient impact such as overvoltage and overcurrent, and safety accidents such as equipment damage and fire disasters are effectively prevented.

Description

Technical Field

[0001] The invention relates to the technical field of voltage meter overload protection, in particular to a high-precision voltage meter with a high-voltage circuit overload protection structure. Background Art

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

[0003] The prior art application number is: 202022912138.2. A high-precision voltmeter with a high-voltage circuit overload protection structure includes a liquid crystal display on the side of the voltmeter housing, a speaker below the liquid crystal display, a first support base at the bottom of the inner part of the voltmeter housing, a controller at the top of the first support base, the other side of the voltmeter housing is connected to the detection protection housing, the top and bottom of the detection protection housing are symmetrically provided with wiring openings, a connecting through hole is provided at the connection between the detection protection housing and the voltmeter housing, a second support base is provided at the bottom of the inner part of the detection protection housing, a fuse protection device is provided at the bottom 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 connector and a fuse, and a high-voltage test instrument is provided on the side of the fuse protection device. The above-mentioned high-precision voltmeter with a high-voltage circuit overload protection structure includes a simple device structure, fast power-off, very high safety, and good practicality.

[0004] However, the prior art still has the following deficiencies. First, when the above-mentioned device is in use, a high-voltage testing instrument is provided on the side of the fuse protection device. The energy in the circuit will not be released immediately when the fuse blows, resulting in an arc. At this time, the tension rebound of the arc extinguishing spring and the distance between the fuse are widened, which plays a role in extinguishing the arc and quickly cuts off the power. However, although the above-mentioned device can detect an abnormal increase in voltage or current and immediately cut off the circuit, it cannot release the transient energy safely, which can easily lead 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 is high-precision and capable of releasing transient energy. Summary of the invention

[0005] The object 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-mentioned background technology.

[0006] In order 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 carrying mechanism, an intelligent identification mechanism and a high-voltage overload protection mechanism, wherein the high-voltage overload protection mechanism is fixedly connected to the interior of the carrying mechanism, and the intelligent identification mechanism is fixedly connected to the interior of the carrying mechanism.

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

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

[0009] According to the above technical solution, the intelligent identification mechanism is composed of a quantum point contact sensor, a signal conditioning circuit, a mounting bracket, 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 shell, the signal conditioning circuit is fixedly connected to the top of the quantum point contact sensor, the mounting bracket is fixedly connected to the inside of the shell, the high-precision analog-to-digital converter is fixedly connected to the inside of the mounting bracket, 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, and the electrical interface is fixed. The device is connected to the surface of the microcontroller, the digital display is fixedly connected to the inner wall of the shell, the control circuit board is fixedly connected to the inner wall of the shell, 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, the microcontroller is electrically connected to the digital display and the control circuit board, and QPC sensor technology is used in combination with deep learning algorithms to optimize signals to achieve high-precision voltage measurement. The QPC sensor, with its extremely high sensitivity and stability, ensures that voltage changes can be accurately captured even in complex electromagnetic environments, 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 is composed of a connecting plate, an electric socket, a second transmission wire, a solid-state relay, an electric plug, an insulator, an arc-extinguishing spring, a connector, a fuse and a safety release port. The connecting plate is fixedly connected to the inside of the shell, the electric socket is fixedly connected to the back of the connecting plate, the second transmission wire is electrically connected to the electric socket and the microcontroller, the solid-state relay is fixedly connected to the surface of the electric socket, the electric plug is fixedly connected to the left and right ends of the second transmission wire, and is plugged into the electrical interface and the inside of the electric socket, the insulator is fixedly connected to the front of the connecting plate, the arc-extinguishing spring is fixedly connected to the inner side of the insulator, the connector is fixedly connected between the arc-extinguishing springs, the fuse is fixedly connected to the inside of the connector, and the safety release port is fixedly connected to the bottom of the connector. It can be combined with 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 found, the early warning mechanism is immediately triggered to start the fuse protection device to achieve the function of protecting the equipment and reduce safety hazards.

[0011] According to the above technical solution, the transient energy release unit is composed of a support rod, a load-bearing mounting frame, a release motor, an output shaft and an energy converter. The support rod is fixedly connected to the inside of the outer shell, the load-bearing mounting frame is fixedly connected to the top of the support rod, the release motor is fixedly connected to the top of the load-bearing mounting frame, the output shaft is rotatably connected to the side of the release motor, and 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 energy accumulation causing fire and other safety accidents.

[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-computer interaction and meets the needs of use. The interface design is intuitive and easy to use, 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, so that when an abnormal increase in voltage or current is detected, 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 has unique transient characteristics, that is, it can quickly realize energy conversion and release to prevent the occurrence of safety hazards.

[0014] According to the above technical solution, the signal conditioning circuit 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, so as to facilitate the display and control output of the signal under normal conditions, and at the same time be able to transmit the abnormal signal, so as to trigger the protection mechanism in time to prevent equipment damage and fire risk.

[0015] According to the above technical solution, the electrical socket is electrically connected to the arc extinguishing spring, so that once the device measures an overload signal, the protection mechanism is immediately triggered to cut off the circuit.

[0016] Compared with the prior art, the beneficial effects achieved by the present invention are: 1. The present invention, through the design of the transient energy management and release module, can quickly capture and safely release transient energy when overload occurs, avoiding energy waste and equipment impact. This energy management strategy not only helps to protect equipment from damage, but also improves the overall energy efficiency level of the system, promotes the rational use of energy, and improves the safety and reliability of the power system.

[0017] 2. The present invention can monitor voltage and current changes in real time through an integrated intelligent overload warning and protection system, and perform data analysis in combination with intelligent algorithms to identify potential overload risks in advance. Once an overload signal is detected, the system can respond quickly and cut off the overload path by quickly switching the circuit, and cooperate with transient energy release to effectively prevent equipment damage and fire and other safety accidents.

[0018] 3. The present invention can quickly disperse or absorb energy when transient phenomena occur through a transient energy safety release mechanism, thereby protecting key electronic components in the circuit from damage caused by transient shocks such as overvoltage and overcurrent, which helps to extend the service life of the components and improve the overall reliability of the system. By releasing transient energy in time, chain reactions caused by transient phenomena, such as voltage fluctuations, current mutations, etc., can be prevented, which may cause more serious damage to the system.

[0019] 4. The present invention reduces the impact of transient phenomena on the system by converting transient energy into a harmless form through the transient energy safety release mechanism. The transient energy safety release helps to maintain the stable operation of the system, optimize the system performance, improve the overall efficiency of the system, and reduce the problems that may cause circuit short circuits, equipment overheating, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the appearance structure of the present invention; Figure 2 It is a rear view structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the unfolded structure of the back plate of the present invention; Figure 4 It is a schematic diagram of the internal structure of the housing of the present invention; Figure 5It is a schematic diagram of the internal side structure of the present invention; Figure 6 The present invention Figure 5 The enlarged structural diagram at A in the middle; Figure 7 It is a schematic diagram of the structure of the intelligent identification mechanism of the present invention.

[0021] In the figure: 1. Carrying mechanism; 101. Housing; 102. Control panel; 103. Display screen; 104. Mounting block; 105. Back plate; 106. Back plate connecting plate; 107. Circuit interface; 2. Intelligent identification mechanism; 201. Quantum point contact sensor; 202. Signal conditioning circuit; 203. Mounting frame; 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 socket; 303, second transmission wire; 304, solid-state relay; 305, electrical plug; 306, insulator; 307, arc extinguishing spring; 308, connector; 309, fuse; 310, safety release port; 311, support rod; 312, load-bearing mounting frame; 313, release motor; 314, output shaft; 315, energy converter. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-7 The present invention provides a technical solution: a high-precision voltmeter with a high-voltage circuit overload protection structure, comprising 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.

[0024] 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 supporting mechanism 1 , and the transient energy release unit is fixedly connected to the inside of the supporting mechanism 1 .

[0025] The bearing mechanism 1 is composed of a shell 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 shell 101, the display screen 103 is fixedly connected to the surface of the shell 101, the display screen 103 is electrically connected to a digital display 208 for real-time viewing by a user, the control panel 102 is electrically connected to a control circuit board 209, which is convenient for human-computer interaction and meets the needs of use. The interface design is intuitive and easy to use, and supports graphical data display and historical data query. The mounting block 104 is fixedly connected to the side of the shell 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 shell 101, and the circuit interface 107 is fixedly connected to the bottom of the shell 101, playing the main role of bearing, interaction and convenient installation.

[0026] The intelligent identification mechanism 2 is composed of a quantum point contact sensor 201, a signal conditioning circuit 202, a mounting frame 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 output. The signal conditioning circuit 202 is fixedly connected to the top of the quantum point contact sensor 201 to amplify, filter and linearize the electrical signal. The signal conditioning circuit 202 is provided with two-channel power output, one channel is connected to the fuse protection unit, and the other channel is connected to the digital display 208, so as to facilitate the display and control output of the signal under the normal state, and at the same time, the abnormal signal can be transmitted, and the protection mechanism can be triggered in time 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, so as to facilitate 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, so as to facilitate the digital 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 2 09. QPC sensor technology is used, combined with deep learning algorithms for signal optimization to achieve high-precision voltage measurement. The QPC sensor, with its extremely high sensitivity and stability, ensures that voltage changes can be accurately captured even in complex electromagnetic environments. At the same time, the digital signal is filtered, calibrated, and linearized to ensure recognition accuracy. It can monitor voltage and current changes in real time, combine intelligent algorithms for data analysis, 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 equipment damage and fire and other safety accidents.

[0027] The fuse protection unit is composed of a connection plate 301, an electrical socket 302, a second transmission wire 303, a solid-state relay 304, an electrical plug 305, an insulator 306, an arc extinguishing spring 307, a connector 308, a fuse 309 and a safety release port 310. The connection plate 301 is fixedly connected to the inside of the housing 101, and the electrical socket 302 is fixedly connected to the back of the connection plate 301. The electrical socket 302 is electrically connected to the arc extinguishing spring 307. Once the device measures an overload signal, the protection mechanism is immediately triggered to cut off the circuit. The second transmission wire 303 is electrically connected to the electrical socket 302 and the microcontroller 206. The solid-state relay 304 is fixedly connected to the electrical socket. The surface of the connecting plate 302, the electrical plug 305 is fixedly connected to the left and right ends of the second transmission wire 303, and is plugged into the electrical interface 207 and the inside of the electrical 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 inner side 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, and the safety release port 310 is fixedly connected to the bottom of the connecting piece 308. It can combine high-speed ADC and intelligent algorithms to monitor the current and voltage changes in the circuit in real time. Once an abnormality is found, the early warning mechanism is immediately triggered to start the fuse protection device to achieve The function of protecting the equipment is to reduce safety hazards. The transient energy release unit is composed of a support rod 311, a load-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 load-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 load-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, and the energy converter 315 is electrically connected to the release motor 313 to facilitate the detection of voltage or current abnormalities. When the voltage rises, the system not only cuts off the circuit immediately, but also releases the transient energy safely through the energy conversion device. The transient energy conversion and release has a unique transient characteristic, that is, it can quickly realize the conversion and release of energy to prevent the occurrence of safety hazards. The transient energy is safely released through the energy conversion device, and the energy is quickly released through the release motor 313 to avoid energy accumulation causing fire and other safety accidents. The transient energy safety release mechanism can quickly disperse or absorb energy when transient phenomena occur, thereby protecting key electronic components in the circuit from damage caused by transient shocks such as overvoltage and overcurrent, which helps to extend the service life of the components and improve the overall reliability of the system.

[0028] When in use, when current enters the quantum point contact sensor 201, it accurately captures the voltage signal in the circuit and converts the voltage signal into an electrical signal 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 through a high-precision analog-to-digital converter 204. The subsequent digital signal processing is performed 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 through 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 started, and the fast-response solid-state relay quickly blows the fuse, cuts off the current, and quickly extinguishes the arc through the arc extinguishing spring. At the same time, the transient energy generated is converted by the energy converter 315 and safely released by releasing the output of the motor 313, so as to reduce the possibility of circuit short circuit, equipment overheating and other problems.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-precision voltmeter with a high-voltage circuit overload protection structure, comprising a load-bearing mechanism (1), an intelligent identification 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 interior of the supporting mechanism (1), and the intelligent identification mechanism (2) is fixedly connected to the interior of the supporting mechanism (1); The high-voltage overload protection mechanism (3) comprises a fuse protection unit and a transient energy release unit, the fuse protection unit is fixedly connected to the inside of the support mechanism (1), and the transient energy release unit is fixedly connected to the inside of the support mechanism (1).

2. A high-precision voltmeter with a high-voltage circuit overload protection structure according to claim 1, characterized in that: 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).

3. A high-precision voltmeter with a high-voltage circuit overload protection structure according to claim 2, characterized in that: The intelligent identification mechanism (2) is composed of a quantum point contact sensor (201), a signal conditioning circuit (202), a mounting frame (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); the signal conditioning circuit (202) is fixedly connected to the top of the quantum point contact sensor (201); the mounting frame (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 frame (203); the digital The 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), and the microcontroller (206) is electrically connected to the digital display (208) and the control circuit board (209).

4. A high-precision voltmeter with a high-voltage circuit overload protection structure according to claim 3, characterized in that: The fuse protection unit is composed of a connection plate (301), an electrical connection seat (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 connector (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 seat (302) is fixedly connected to the back of the connection plate (301); the second transmission wire (303) is electrically connected to the electrical connection seat (302) and the microcontroller (206); the solid-state relay (304) is fixedly connected to the back of the connection plate (301); the second transmission wire (303) is electrically connected to the electrical connection seat (302) and the microcontroller (206); and the solid-state relay (304) is fixedly connected to the back of the connection plate (301). The electric connector (305) is fixedly connected to the surface of the electric socket (302), the electric connector (305) is fixedly connected to the left and right ends of the second transmission wire (303), and is plugged into the electrical interface (207) and the inside of the electric 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 inner side 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), and the safety release port (310) is fixedly connected to the bottom of the connecting piece (308).

5. The high-precision voltmeter with a high-voltage circuit overload protection structure according to claim 4, characterized in that: The transient energy release unit is composed of a support rod (311), a load-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 load-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 load-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).

6. A high-precision voltmeter with a high-voltage circuit overload protection structure according to claim 5, 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).

7. A high-precision voltmeter with a high-voltage circuit overload protection structure according to claim 6, characterized in that: The energy converter (315) is electrically connected to the release motor (313).

8. The high-precision voltmeter with a high-voltage circuit overload protection structure according to claim 7, 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).

9. The high-precision voltmeter with a high-voltage circuit overload protection structure according to claim 8, characterized in that: The electrical connection seat (302) is electrically connected to the arc extinguishing spring (307).

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