Minimum
oil
circuit breaker
Bulk oil circuit breakers are suitable for voltage upto 336 kV as it is simple
sturdy. For higher voltages the size becomes large. This type of breaker is
rapidly being replaced by other types of breakers
Oil circuit breakers use Dielectric oil (Transformer oil) for the purpose of arc extinction. In bulk oil circuit breakers the arc extinction takes place in a tank; whereas in minimum oil circuit breakers the arc extinction takes place in insulating housing enclosed in ceramic enclosures.
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