The oil circuit breaker is the one of the oldest type of circuit breakers. The operation of oil circuit breaker is quite simple
ADVANTAGES OF OIL CIRCUIT BREAKER (OCB)
As an Arc extinguishing medium oil has the following advantages:
1. Oil produces hydrogen during arching. The hydrogen helps extinguish the arc.
2. The oil provides insulation for the live exposed contacts from the earthed portions of the container
3. Oil provides insulation between the contacts after the arc has been extinguished
TYPES OF OCBS
It has two types namely BULK OIL CIRCUIT BREAKERS & MINIMUM OIL CIRCUIT BREAKERS with different ranges