Oil Circuit Breaker Diagram. An oil circuit breaker is one kind of circuit breaker where the insulating oil can be used as an arc quenching medium. There is no special system for arc control other than the increase in length caused by the separation of contacts.
Whenever there is a separation of current carrying contacts in the oil the arc in circuit breaker is initialized at the moment of separation of contacts and due to this arc the oil is vaporized and decomposed in mostly hydrogen gas and. We are using it on a 138kv system in this station. Oil circuit breaker is such type of circuit breaker which used oil as a dielectric or insulating medium for arc extinction.
We know that the oil in the circuit breaker performs two functions.
We took them down for maintenance on the breaker. In oil circuit breaker the contacts of the breaker are made to separate within an insulating oil. When the fault occurs in the system the contacts of the circuit breaker are open under the insulating oil and an arc is developed between them and the heat of the arc is. Today i had to re hang the leads from the bus.
