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Constant voltage overvoltage protector

A technology of overvoltage and protectors, which is applied in the direction of overvoltage protection resistors and varistors, etc., can solve the problems that lightning arresters are prone to explosion, and achieve the effect of eliminating explosion phenomena, solving explosion problems, and stabilizing dry humidity

Inactive Publication Date: 2011-06-15
HEFEI NANNAN POWER EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of arrester is prone to explosion when it is put into power system operation

Method used

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Embodiment Construction

[0018] The constant voltage overvoltage protector includes an insulating sleeve 1, a zinc oxide valve disc 2 is installed in the insulating sleeve 1, a metal cap 3 is installed on the upper end of the insulating sleeve 1, and a zinc oxide valve disc 2 is installed between the metal cap 3 There is an upper spring 4, a metal blocking seat 5 is installed at the bottom of the insulating sleeve 1, a gap ring block 6, an epoxy cover tube 7, and a small hole are sequentially stacked between the zinc oxide valve plate 2 and the metal blocking seat 5 Positive pressure sealing disc 8, the gap ring block 6 and the cover tube 7 have an opening in the middle to communicate with each other, the gap ring block 6 has a gap on the side wall and the opening and the inner cavity of the insulating sleeve 1, and the cover tube 7 There is a lower spring 9, the lower end of the lower spring 9 is pressed on the positive pressure sealing disk 8 with a hole in the middle, the upper end of the lower sprin...

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Abstract

The invention discloses a constant-voltage over-voltage protector, which comprises an insulating sleeve. A zinc oxide valve plate is installed in the insulating sleeve, a metal cap is installed at the upper end of the insulating sleeve, an upper spring is installed between the zinc oxide valve plate and the metal cap, a metal blocking seat is installed at the bottom part of the insulating sleeve,a gap ring block, a shrouding barrel, a lower spring, a negative voltage sealing pad and a positive voltage sealing pad are superposed between the zinc oxide valve plate and the metal blocking seat in sequence, a breathing hole is formed on the metal blocking seat, and communicates with the inner cavity of the insulating sleeve. The constant-voltage over-voltage protector eliminates the explosionphenomenon under the over-positive voltage condition by adopting the metal blocking seat with the breathing hole and the circulation pattern of breathe-out and breathe-in, further avoids the valley zone of the Paschen curve under the over-negative voltage, and ensures the realization of the constant voltage state of the voltage protector under the action of the double springs. The problem with the explosion of the prior lightning protector caused by gaseous discharge during the process of operation is thoroughly solved, and the safety performance of the product is enhanced.

Description

Technical field [0001] The invention belongs to power system protection equipment, in particular a constant voltage overvoltage protector. Background technique [0002] In recent years, sic valve arresters in many places have been gradually replaced by ZnO valve arresters; and because ZnO valve has good nonlinearity, the gap ZnO valve arrester has gradually turned to no gap. Nowadays, this kind of ZnO valve arrester has rarely used porcelain sleeves, and most of them have a composite insulating sleeve structure. After the resistors are installed in the cavity, polymer insulating fillers are filled to completely seal them. In this way, firstly, it is avoided that moisture is sucked into the cavity of the composite sleeve, causing the resistance piece to get damp; secondly, the resistance piece and the insulating sleeve are combined into a whole to facilitate conduction and heat dissipation. However, many manufacturers do not use polymer insulating fillers for casting and sealing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/12
Inventor 陈晓燕丁涛甘朝宏沈正海
Owner HEFEI NANNAN POWER EQUIP CO LTD
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