ZnO lightning arrester is one kind most world advanced over-voltage protector at present due to its core components of resistance applying ZnO and other metal oxide to make of comparing with traditional carborundum arrester, it improves greatly V-A characteristics of resistance, increases the getting through ability of resistance, thereby it brings fundamental, change to features of arrester.

•Under normal working voltage. The current passing arrester only A class, when bearing over voltage. The excellent non-linear V-A features of arrester would make effect, the current passing through the arrester increase high to thousands of Ampere instant the arrester is under getting through state, to release over-voltage energy therefore it effective limits the damage to power transmission equipments due to over voltage