A lightning protection overvoltage protection component

A technology of overvoltage protection and components, applied in the direction of emergency protection circuit devices, emergency protection circuit devices, electrical components, etc. for limiting overcurrent/overvoltage, which can solve the limitation of rated operating current and increase the initial voltage of line breakdown , circuit operation overvoltage and fault power frequency overvoltage protection ability reduction, etc., to achieve the effect of preventing deflagration accidents
CN103337848BInactive Publication Date: 2016-01-06SOUTH CHINA UNIV OF TECH +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTH CHINA UNIV OF TECH
Publication Date
2016-01-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an anti-thunder overvoltage protection component which comprises a piezoresistor disc, a positive temperature coefficient thermistor disc and a gas discharge tube, wherein the piezoresistor disc, the positive temperature coefficient thermistor disc and the gas discharge tube are integratedly packaged; the first common terminal of the positive temperature coefficient thermistor disc and the gas discharge tube is a first leading-out terminal; the second common terminal of the positive temperature coefficient thermistor disc and the gas discharge tube is connected with one end of the piezoresistor disc; the other end of the piezoresistor disc is a second leading-out terminal. The anti-thunder overvoltage protection component can restrain the switching overvoltage and fault power frequency overvoltage, and can play the protective role of a normal pressure cell in case of a thunderstrike pulse overvoltage.
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Description

technical field

[0001] The invention relates to lightning protection and overvoltage protection technology, in particular to a composite lightning protection and overvoltage protection component. Background technique

[0002] ZnO varistors have been widely used in power electronic circuits to absorb overvoltage caused by lightning pulses and power frequency overvoltage caused by system operation and system failure. However, the varistor itself has a certain limit for absorbing surge energy. The varistor connected in parallel to the power circuit absorbs overvoltage energy (especially the long-lasting power frequency overvoltage). At the same time, its own temperature rises. When the varistor When the energy absorbed by the resistance is too large, the varistor may explode and catch fire. Nowadays, this problem is usually solved by increasing the varistor voltage and diameter of the varistor, but this reduces the absorption wave of the varistor to a certain extent. The prote...

Claims

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