Monday, March 19, 2012

High Voltage Circuit Breakers

Electrical power transmission networks are protected and controlled by high-voltage breakers.

SF6 gas filled and spring mechanism operated CBs are widely used in modern EHT systems

Basic operating principle of these breakers does not vary from any other LV or MV CBs

Sulphur hexafluoride (SF6) gas is a good arc quenching medium due to its low ionization property

SF6 has good insulation properties too

The chambers and the supporting hollow insulators are filled with SF6 gas

In the previous picture, the breaker is operated using a gang operated single mechanism box

CBs with separate operating mechanism box for each pole are also in use.High Voltage Circuit BreakersSF6 High Voltage Circuit Breakers

SF6 High Voltage Circuit Breakers


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