Constant voltage overvoltage protector

A technology of overvoltage and protectors, applied in overvoltage protection resistors, varistors, etc., can solve the problems that arresters are prone to explosion, achieve the effect of eliminating explosion phenomena, solving explosion problems, and enhancing safety performance

Inactive Publication Date: 2008-12-17
HEFEI NANNAN POWER EQUIP CO LTD
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  • Abstract
  • Description
  • Claims
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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 plate 2 is installed inside the insulating sleeve 1, a metal cap 3 is installed on the upper end of the insulating sleeve 1, and a metal cap 3 is installed between the zinc oxide valve plate 2 and 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 material cover tube 7, and a small hole in the middle are stacked in sequence 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 middle part of the cover tube 7 have openings to communicate with each other, there is a gap on the side wall of the gap ring block 6 to communicate with the opening and the inner cavity of the insulating sleeve 1, and the inside of the cover tube 7 There is a lower spring 9, the lower end of the lower spring 9 presses on the posi...

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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 explosion phenomenon 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 to a constant voltage overvoltage protector. Background technique [0002] In recent years, the sic valve arrester in many places has been gradually replaced by the ZnO valve arrester; and because the ZnO valve has good nonlinearity, the ZnO valve arrester with gap has gradually turned to no gap. At present, this kind of ZnO valve surge arrester rarely uses porcelain sleeves, and most of them use composite insulating sleeve structure. After the resistor is installed in the cavity, it is filled with polymer insulating filler to fully seal it. In this way, one is to avoid moisture absorption in the cavity of the composite sleeve, which causes dampness of the resistor sheet; the other is that the combination of the resistor sheet and the insulating sleeve is conducive to conduction and heat dissipation. However, in order to save cost and reduce weight when producing products, many ...

Claims

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Application Information

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Patent Type & Authority Applications(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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