Answer / angana majumder

we know circuit breakers are used for mainly for switching
and current interrupting device.this particular cb uses the
gas sulphur hexafluride gas as for arc quenching formed
during short circuit.thus the current is interupted without
the risk or fire.

Answer / rajib

sf6 circuit breaker are used for heavy transmission line as
a protective device.sf6 gas bear high dray electric
character so that it can prevent arc during
operation.normally its bear 2.8kg/cm gas pressure.but at
operation time 16.8g/cm gas pressure come from gas reserves
tank and prevent arc.

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