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Surge arrester
Jan 13, 2017

Surge arrester connection between the cable and the Earth, usually with protection devices in parallel. Surge arresters can effective protection of communication equipment, in the event of abnormal voltage, surge arresters will, play a protective role. When a cable or device when run under normal operating voltage, lightning arrester does not have an impact, to the ground as a circuit breaker. If there is a high voltage, and endanger the protected equipment when insulation, arresters immediate action, high-voltage current-driven Earth, thereby limiting the voltage amplitude, protecting insulation of cables and equipment. When the voltage disappears, surge arresters quickly restored the communication line to work properly.

Therefore, the main role is through parallel spark gap of an arrester or the role of nonlinear resistance, of invading flow cut picture, reduce the protection devices have voltage value, which play a role in protection of telecommunication lines and equipment.

The high voltage surge arresters can be used lightning protection, can also be used to high voltage protection operation.

Role of the surge arrester is used to protect a variety of electrical equipment in power system from lightning

Voltage, overvoltage, frequency of transient overvoltage damage appliances. Surge arrester types are mainly the protection gap, valve type arrester and MOA. Protection gap to limit atmospheric overvoltage, generally used for power distribution systems, line and substation protection into line segments. Valve type arrester and the protection of zinc oxide surge arrester used in substations and power plants, 500KV and below system is used to limit overvoltages of atmospheric, in a high pressure system will also be used to limit overvoltages or backup protection for overvoltage.


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