Circuit breaker with trip unit mounted tripping latch plunger and latch therefore

摘要

This concerns a molded case circuit breaker having separable main contacts and an operating mechanism utilized to cause the separable main contacts to open and close. A trip unit is provided to actuate the operating mechanism in desirable circumstances. The trip unit has a plunger and latch contained therein which is primarily responsible for latching the circuit breaker contacts open by way of the operating mechanism once a trip has occurred.