Types Of Oil Circuit Breakers
Oil circuit breakers can be classified into following types:
1) Bulk oil circuit breakers, which use a large quantity of oil. In this circuit breaker the oil serves two purposes. Firstly it extinguishes the arc during opening of contacts and secondly it insulates the current conducting parts from one another and from the earthed tank. Such circuit breakers are classified into:
a)Plain oil circuit breakers
b)Arc control circuit breakers
In the former type no means is available for controlling the arc and the contacts are exposed to the whole of the oil in the tank. In the latter special arc control devices are employed to get the beneficial action of the arc as efficiently as possible
2)Low oil circuit breakers, which use minimum amount of oil. In such circuit breakers oil is used only for arc extinction, the current conducting parts are insulated by air or porcelain or organic insulating material.
Written by John on October 10th, 2008 with
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