CN-224216769-U - Non-contact voltage measurement device

Abstract

The utility model discloses a non-contact voltage measurement device, which relates to the technical field of electric power systems and comprises an outer shell, two electric connecting pieces, a main PCB (printed Circuit Board), a capacitor polar plate and an electric connection plate, wherein a magnetic adsorption fixing module arranged on the outer shell enables the device to be firmly adsorbed on the surface of a panel of a screen cabinet, the main PCB, the capacitor polar plate and the electric connection plate are all arranged in the outer shell, the capacitor polar plate, the electric connection plate and the main PCB are in a non-contact state, the capacitor polar plate is electrically connected with the main PCB, a first connecting part of the electric connecting pieces is connected with the electric connection plate, a second connecting part of the electric connecting pieces is used for connecting corresponding electrode columns of an electric power pressing plate, the electric connection plate is used for receiving voltage signals from the electric connecting pieces, the capacitor polar plate generates corresponding electric signals through electric field changes around the induction electric connection plate, and the main PCB indirectly deduces the voltage value of the electric power pressing plate based on the induction electric signals. The utility model has the advantages of convenient disassembly and assembly and safe use.

Inventors

• MA BO
• WANG ZHENBO
• FANG JIE
• ZHANG NANA
• LIANG YUEXIN
• TIAN CHAOHUI
• WANG WEI
• CHEN WEI
• LI TIANBAI
• YANG XUAN
• WANG BIN
• HE YUFENG
• CUI YI
• Ma Hengkai

Assignees

• 国网陕西省电力有限公司西安供电公司

Dates

Publication Date

20260508

Application Date

20250427

Claims (9)

1. 1. The utility model provides a non-contact voltage measurement device, includes the shell body, its characterized in that still includes two electric connection piece (150), main PCB board (140), electric capacity polar plate (120) and meets electric plate (130), sets up magnetism on the shell body adsorbs fixed module (190) make the shell body can adsorb and fix on the cabinet panel, main PCB board (140), electric capacity polar plate (120) and electric connection board (130) are all installed in the shell body, electric capacity polar plate (120) electric connection board (130) with be non-contact state between main PCB board (140), first connecting portion of electric connection piece (150) with electric connection board (130) link to each other, the second connecting portion of electric connection piece (150) is used for connecting the electrode post that corresponds of electric power clamp plate, electric connection board (130) are used for receiving the voltage signal from electric connection piece (150), electric capacity polar plate (120) sense the electric field variation around electric connection board (130) and produce corresponding electrical signal according to this, electric signal value is calculated through the electric power on the main PCB board (140).
2. 2. The non-contact voltage measurement device of claim 1, further comprising a probe mount (180), wherein the probe mount (180) is utilized to secure a static discharge patch to the main PCB (140).
3. 3. The non-contact voltage measurement device of claim 1, wherein the outer housing is further provided with a grounding block (170) having one end protruding out of the outer housing.
4. 4. The non-contact voltage measurement device of claim 1, further comprising an indicator light (1100) mounted on the outer housing and connected to the main PCB (140).
5. 5. The non-contact voltage measurement device according to claim 1, wherein the outer housing is formed by splicing a front housing (110) and a rear housing (160), the magnetic adsorption fixing module (190) is arranged on the rear housing (160), and inserting grooves in one-to-one correspondence with the main PCB (140), the capacitor plate (120) and the grounding plate (130) are arranged in a main cavity (161) of the rear housing (160).
6. 6. The non-contact voltage measurement device of claim 5, wherein the rear case (160) further has two side cavities (162) separated from the main cavity (161), the electrical connector (150) is mounted in the corresponding side cavity (162), the second connection portion of the electrical connector (150) is an elastic clamping end (151), the first connection portion of the electrical connector (150) is a contact pressure head (155) attached to the electrical connection plate (130), and the contact pressure head (155) is stably attached to the electrical connection plate (130).
7. 7. The non-contact voltage measurement device according to claim 6, wherein the electrical connector (150) further comprises an elastic screw portion (152) mounted in a sleeved connection with a limit post (169) disposed in the side cavity (162), one end of the elastic screw portion (152) is connected with the elastic clamping end (151), a first rotation blocking portion (153) is connected between the contact pressure head (155) and the other end of the elastic screw portion (152), and the first rotation blocking portion (153) cooperates with a corresponding limit structure to prevent rotation of the contact pressure head (155).
8. 8. The non-contact voltage measuring device according to claim 7, wherein the contact pressure head (155) is connected to the first rotation preventing portion (153) by a second rotation preventing portion (154), and the second rotation preventing portion (154) is matched with a corresponding limit structure.
9. 9. The non-contact voltage measurement device according to claim 8, wherein the first rotation blocking portion (153) and the second rotation blocking portion (154) are both in a U-shaped structure but opposite in bending direction, and the limiting structure is a protruding portion (1620) working in cooperation with a return bend of the U-shaped structure.

Description

Non-contact voltage measurement device Technical Field The utility model relates to the technical field of power systems, in particular to a non-contact voltage measuring device. Background The power pressing plate is a critical component in a transformer substation protection circuit, is usually installed in an outlet circuit or a functional protection circuit of a transformer substation protection system and is used for executing opening and closing operations of a power line, so that safe operation of the transformer substation system is ensured. The conventional power press plate is generally placed inside the panel of the protection cabinet, the circuit layout is complex, and both electrode columns need to be connected to the protection circuit. However, such power clamps do not have the function of measuring the voltage on the protection line. At present, although improved power pressing plates are on the market, the pressing plates integrate a voltage measurement function, and are only suitable for newly built substations. In the early stage of the construction of the transformer substation, the power pressing plate with the voltage measurement function needs to be preassembled into the screen cabinet. And to the transformer substation that needs to reform transform, then need replace original electric power clamp plate, this often means that need demolish original circuit, the construction degree of difficulty is great. In order to overcome the technical problem of difficult installation, a voltage measuring device (CN 221446186U) that can be installed later is appeared in the market, but the voltage measuring device has the following problems: 1. The device is usually fixed by adopting an adhesive mode, and the risk of falling off the device caused by the decline or aging of the adhesive performance over time exists. 2. The PCB inside the device is directly contacted with high voltage, which may not only cause burning of the circuit board, but also cause accidental connection of the pressing plate due to short circuit, thereby causing potential safety hazard. Disclosure of utility model In view of the above, the present utility model aims to provide a non-contact voltage measurement device, which solves the technical problems of difficulty in installation and transformation of the existing voltage measurement device, burnout risk and potential safety hazard caused by direct exposure of a circuit board to a high-voltage environment. In order to achieve the above purpose, the present utility model provides the following technical solutions: The utility model provides a non-contact voltage measurement device, which comprises an outer shell, two electric connection pieces, main PCB board, electric capacity polar plate and electric connection board, the fixed module of magnetism absorption that sets up on the shell makes the shell body adsorb and fix on the screen cabinet panel, main PCB board, electric capacity polar plate and electric connection board are all installed in the shell body, electric capacity polar plate, electric connection board and main PCB board are non-contact state, electric capacity polar plate is connected with main PCB board electricity, electric connection piece's first connecting portion links to each other with the electric connection board, electric connection piece's second connecting portion is used for connecting the electrode post that corresponds of electric power clamp plate, the electric connection board is used for receiving the voltage signal from the electric connection piece, electric field variation around the electric connection board is sensed to electric capacity polar plate, and produce corresponding signal accordingly, main PCB board passes through the indirect voltage value on the electric power clamp plate of calculation of electric signal. Further, the device also comprises a probe seat, and the static electricity discharging adhesive tape is fixed on the main PCB by the probe seat. Further, the outer shell is also provided with a grounding block of which one end extends out of the outer shell. Further, the display device also comprises an indicator light which is arranged on the outer shell and connected with the main PCB. Further, the shell body is formed by splicing a front shell and a rear shell, the magnetic adsorption fixing module is arranged on the rear shell, and the main cavity of the rear shell is internally provided with splicing grooves which are matched with the main PCB, the capacitor pole plates and the power connection plates in a one-to-one correspondence manner. Still further, the backshell still has two side cavity separated with main cavity, and the electric connector is installed in the side cavity that corresponds, and the second connecting portion of electric connector is the elasticity clamping end, and the first connecting portion of electric connector is the contact pressure head that laminates with the electric plate that meets,