Target circuit for circuit breaker static trip unit

Details Target circuit for circuit breaker static trip unit Target circuit for circuit breaker static trip unit

H - Electricity

02

H

348/26

H02H 3/04 (2006.01) H02H 3/10 (2006.01)

Patent

CA 1139418

41 PR 6100 ABSTRACT OF THE DISCLOSURE In a circuit breaker static trip unit, multiple targets are utilized to indicate which of several possible abnormal current conditions was responsible for precipitating tripping of the breaker contacts to interrupt a distribution circuit. The targets are selectively activated via a common target circuit which includes its own power supply. The target circuit is fail-safe in that failure or malfunction thereof cannot jeopardize tripping of the breaker contacts. Appropriate clamping is utilized to insure that only the selected target is activated.

357101

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