Abstract :
A NEW compressed air circuit breaker has been developed recently for a pioneering installation of outdoor metal-enclosed switchgear for 69-kv service. This circuit breaker, with a current rating of 2,000 amperes and with an interrupting capacity of 3.5 million kva, is of the indoor type mounted in a weatherproof steel enclosure for outdoor service. It has an orifice type of interrupter.
