Hydraulic Operating Mechanisms for High-Capacity Circuit Breakers [includes discussion]

The purpose of this paper is to present a brief r??sum?? of a rather comprehensive study concerning circuit-breaker operating mechanisms and to describe a new type of mechanism which depends on a combination of gas and liquid for its energy supply and transmission medium. The authors believe the new design is a definite improvement from the standpoint of overall cost and reliability, particularly for circuit breakers which now require heavy-duty spring or compressed-air operators.