Surge arrester with polymer housing is a kind of lightning arrester. It is the key equipment in the electric power system. They are protecting the equipments against the lightning overvoltage impulse and operstion overvoltage impulse. There are two types of lightning arrester in the power system, one is surge arrester with porcelain housing, another is surge arrester with polymer housing. There is only different on the insulating housing. We also call surge arrester with polymer housing Silicone polymer housing surge arrester or composite metal oxide surge arrester. We call surge arrester with porcelain housing porcelain housing metal oxide surge arresters.
This type surge arrester with series gaps used in the power distribution and transmission line.