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Transformer counterattack overvoltage protection device

A protection device and transformer technology, applied to corona discharge devices, circuits, electrical components, etc., can solve the problems of frequent and fragile arresters, large grounding resistance of transformers, weak insulation of transformers, etc., so as to improve safety capabilities and reduce lightning current. , the effect of reducing the destructive power

Inactive Publication Date: 2021-11-02
南宁超伏电气科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a transformer counter-attack overvoltage protection device to solve the existing technical problems of large transformer grounding resistance, large lightning current, weak transformer insulation, and frequent and easily damaged arresters.

Method used

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  • Transformer counterattack overvoltage protection device
  • Transformer counterattack overvoltage protection device
  • Transformer counterattack overvoltage protection device

Examples

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Embodiment 2

[0040] Such as image 3 As shown, the difference between this embodiment and Embodiment 1 is that the sealed arc extinguishing unit A is set as a sealed tube, and the upper electrode 1 and the lower electrode 6 are respectively arranged at both ends of the sealed tube to be sealed, and an insulating oil 2 is arranged inside the sealed tube. The side of the tube is provided with a skirt 4, and the inner side of the sealed tube is provided with arc extinguishing grids 9 at intervals, and the transverse length of the arc extinguishing grid 9 is greater than half of the inner diameter of the sealed tube. The bottom of the upper electrode 1 is provided with an upper tip electrode 8, and the upper end of the lower electrode 6 is provided with a lower tip electrode 11. The upper tip electrode 8 and the lower tip electrode 11 are relatively vertically arranged, and both the upper tip electrode 8 and the lower tip electrode 11 are graphite. electrode.

[0041] In this embodiment, the ...

Embodiment 3

[0044] The difference between this embodiment and Embodiments 1 and 2 is that it also includes a recoil arc extinguishing unit. The recoil arc extinguishing unit is arranged on the top of the sealed arc extinguishing unit A. The recoil arc extinguishing unit includes a lightning electrode, a recoil pipe body , The skirt and the bottom of the recoil pipe are connected to the lightning pole, and the lightning pole is set on the top of the recoil pipe body, the recoil pipe skirt is set on the side of the recoil pipe body, and the interior of the recoil pipe body is set as a recoil hole , the bottom of the recoil hole is provided with a bottom lightning electrode, the lightning electrode and the bottom lightning electrode are graphite electrodes, an insulating liquid is arranged in the recoil pipe body, and the bottom lightning electrode is sealed in the recoil bottom of the hole. By setting the recoil unit, the lightning arc can be recoiled and weakened first, and then the arc is...

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Abstract

The invention discloses a transformer counterattack overvoltage protection device, which belongs to the technical field of lightning protection and arc extinguishing, and comprises a plurality of lightning rods, a telegraph pole and a transformer, the lightning rods are arranged at the top of the telegraph pole, the vertical height of the lightning rods is higher than that of a power transmission line arranged on the telegraph pole, the transformer is arranged on the telegraph pole, and the bottoms of the lightning rods are grounded. According to the invention, the discharge allowance is reduced, and the induced lightning overvoltage is reduced. A recoil lightning rod can reduce the amount of electric arc flowing through the lightning rods, and a recoil pipe recoils and sprays most electric arc, thereby reducing the lightning current, and reducing the degree of lightning stroke influence on a tower, a transformer and a lightning arrester. The discharge time is prolonged, and the discharge intensity is reduced. Strong current is converted into weak current through the device, so that the numerical value of counterattack voltage is reduced, and the safety capability of the transformer and the lightning arrester is improved.

Description

technical field [0001] The invention relates to the technical field of lightning protection and arc extinguishing, in particular to a transformer backlash overvoltage protection device. Background technique [0002] The height of the tower where the transformer is placed is basically more than 3 meters. In places with high terrain such as hillsides, the tower is extremely vulnerable to lightning strikes. Due to the large grounding resistance of the tower, when the lightning current is released to the ground through the grounding device of the tower, the ground potential will rise, resulting in a high counter-attack voltage. The shell of the transformer is connected with the cross arm of the tower, and the shell of the transformer will generate a very high potential, and the huge lightning energy may cause the transformer to explode. [0003] At present, the insulation of transformers is usually grounded by connecting the metal shell of the transformer, the grounding wire of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01T1/08H01T19/04
CPCH01T1/08H01T19/04
Inventor 王嬿蕾王巨丰宋永锋李浩何琪文贾征浩陈宇宁卢杨骆耀敬
Owner 南宁超伏电气科技有限公司
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