Outer Clearance Surge Arresters

The external clearance arrester is an insulated overhead power cable lightning protection device designed and developed for coastal cities, industrial cities, frequent fog, air humidity and air pollution.

Principles and characteristics

Puncture-type external clearance arrester for distribution 10KV overhead insulated wire, which uses a patented design of the puncture-type lead head structure, can penetrate the wire insulation layer to form an electrical connection; the lower end of the arc and the arrester at the top of the arc relative to the head, The formation of a pitch 60-130 series discharge gap, the distance through the lower part of the arrester to install the relative movement of the two to adjust. In the normal state, the high resistance of the arrester resistance chip and discharge gap does not work; only more than the provisions of the lightning over voltage appears, the discharge gap can be breakdown, the formation of short-circuit channel, the power frequency arc will burn outside, Overvoltage energy to protect the wire from burns. After the voltage is released, the arrester resistance chip is restored to high resistance.

Technical parameters and selection table