Discuss low oil (also called oil poor) circuit breakers.

What will be an ideal response?


Low oil circuit breakers are manufactured in several different styles. The plain-break type relies on the surrounding oil and the pressure generated by the production of gas to control the arc when the contacts open. The pressure is eventually vented between the case and the movable contact. Another type of low oil circuit breaker is often referred to as a vented type and is designed with vents that permit the pressure produced by the formation of gas to exit the arc chamber. Another type of low oil circuit breaker intended for use on higher voltages, called the double-break type, employs a double-break contact arrangement.

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