Patent ID: 6577215
Filing Date: 2003-06-10
Classification: H01H

Abstract:
An instantaneous-tripping circuit breaker comprising: a breaking section of a main circuit; an opening-and-closing mechanism section for actuating the breaking section and having a latch receiver for operating the opening-and-closing mechanism for tripping; a thermal overload/open-phase tripping device attached to the breaking section and including a differential shifter mechanism, a temperature-compensating bimetal for linking an output end of the differential shifter mechanism with the latch receiver of the opening-and-closing mechanism section and operating as a tripping lever, and an adjustment dial for adjusting a rated current; an electromagnetic instantaneous-tripping device attached to the breaking section and having a trip coil; and a connection conductor directly connected between the main circuit and the trip coil and having a resistance lower than that of a heater-mounted bimetal so that the circuit breaker can provide a required amount of an overload current.