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What is a lightning arrester, surge arrester knowledge is what

2018-10-12 fong-size

Tube type lightning arrester, clearance arrestor, valve type lightning arrester and zinc oxide lightning arrester is the arrester used in power system.


Tube type of surge arrester is one of the protection gap type lightning arrester, mostly used in power supply circuit for lightning protection. This kind of arrester can play a very good function in the power supply line, effective protection devices in the power supply line.

Clearance arrestor is arguably one of the most simple arrester, according to its shape can be divided into bar, Angle, ring, etc. It is made of the main gap and the auxiliary gaps in series. Protect the clearance is the advantages of simple structure, low cost. Exposed to the air, however, because of the spark gap discharge characteristic is affected by environment, discharge dispersivity, and since the general protection gap of the electric field belongs to uneven electric field, so it's volt-second characteristic curve is steep, cooperate with the insulation of the protected equipment is not ideal; Discharge cutoff wave can be created at the same time, cause harm for devices with the coil. Clearance arrestor another serious disadvantage is that the arcing ability is poor, for through the flow of power frequency after clearance action often can't self extinguishing, will cause the tripping of circuit breaker, in order to protect the safety of power supply, often used with automatic reclosing device. Therefore protect lightning arrester is mainly used for clearance under 10 kv distribution line.