Polymeric Surge Arrester

Application
Massive productions of surge arrester(MOA),either withporcelain or polymeric housing,are suitable in the systems ofpower generation,power transmission,power transformation,and power distribution under AC 220kV and below.They aremainly used to keep the amplitude of lighting impulse withstandvoltage and switching impulse withstand voltage to theprescribed level.
Operating Principle
Surge arrester is the most advanced over-voltage protector inthe world.Its core element,metal oxide varistor(MOV).
Under the circumstance of normal operating voltage,the currentthrough the surge arrester is just on microampere degree.Whensuffered from over-voltage,the surge arrester’s excellent non-linear characteristic will make the current through the surgearrester increase to several thousand amperes.And the surgearrester will be under the circulating state and release over-voltage energy so as to protecting the power transmissionequipment against the damage caused by the over-voltage.

Condition of Use
●Ambient air temperature within the range of-40℃ to+40℃;
●Altitude above sea level not exceeding 2,000m;
●Frequency of the A.C.power supply being 50Hz or 60Hz;
●Power frequency voltage applied continuously between theterminals of the arrester not exceeding its continuousoperating voltage.
●Maximum wind speed not exceeding 35m/s:
●The earthquake intensity not exceeding 7 degrees.
Characteristics
●Low residual voltage
●Long protection distance
●High energy input capacity
●Stable volt-ampere characteristic even after multiple strokes
●Proof against ageing
●Explosion and shatter-resistant design
●Pollution resistant and UV-stable
●Housing resistant to rough handling
●Maintenance free
●Stable against shock and vibration
●High mechanical resistance

Model Designation

Technical Standard
The technical confirms to IEC60099-4.

Operating Principle
Surge arrester is the most advanced over-voltage protector in the world.lts core element, metal oxide varistor(MOV).
Under the circumstance of normal operating voltage, the current through the surge arrester is just on microampere degree. When suffered from over-voltage, the surge arrester’s excellent non-linear characteristic will make the current through the surge arrester increase to several thousand amperes. And the surge arrester will be under the circulating state and release over-voltage energy so as to protecting the power transmission equipment againstthe damage caused by the over-voltage.
Characteristics
1.Low residual voltage
2.Long protection distance
3.High energy input capacity
4.Stable volt-ampere characteristic even after multiple strokes
5.Proof against ageing
6.Explosion and shatter-resistant design
7.Pollution resistant and UV-stable
8.Housing resistant to rough handling
9.Maintenance free
10.Stable against shock and vibration
11.High mechanical resistance