provide Insulation

provide cooling of contacts

quenching arc

none of the above

to act as circuit breaking medium only

for circuit breaking and providing insulation

for providing insulation only

for none of the above purposes

Bulk oil type circuit breaker

Air blast circuit breaker

Vacuum circuit breaker

Sulphur hexafluoride circuit breaker

Air blast circuit breaker

Sulphur hexafluoride circuit breaker

Oil circuit breaker

Vacuum circuit breaker

Air blast

Minimum oil

Bulk oil

Sulphur hexafluoride