Compound clearance surge protector

Abstract

The invention relates to a composite gap electric surge protector having a casing. A first electrode, a second electrode and a varistor are arranged in the casing. A discharger composed of a long gap and at least one short gap is also arranged in the casing. Two adjacent electrode slices parallelly connected with at least one varistor are arranged on the long gap. Conductive grid-plates are also arranged in the long gap. An insulating piece is arranged between two adjacent conductive grid-plates for isolating two conductive grid-plates. Two ends of the discharger (two electrode contracts) respectively connect with the first electrode and the second electrode (connection to the first electrode and the second electrode). The electric surge protector of the invention has strong discharge ability without follow current under the maximum working voltage of the device, low breakdown voltage and variation rate of the current and voltage when breakdown and conduction.

Description

technical field

[0001] The invention relates to an overvoltage protection device, in particular to a composite gap surge protector with lightning protection. Background technique

[0002] A lightning surge cannot be stopped because it contains too much energy, and it is for this reason that the strategy for protecting sensitive electrical equipment from damage from surges is to shunt the surge away from the equipment. In particular, the gas discharge tube and the air gap (spark gap) arrester in the surge protector have a large discharge capacity, but there are three main problems that restrict their popularization and application: one is the continuous current after the pulse discharge causes damage to The short circuit of the system voltage; the second is that there is a contradiction between reducing the breakdown voltage and improving the working reliability and life, because reducing the breakdown voltage requires reducing the gap length, which will reduce the reliabilit...

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