System for protecting power distribution circuit against...

Details System for protecting power distribution circuit against... System for protecting power distribution circuit against...

H - Electricity

02

H

348/24

H02H 3/26 (2006.01) H02H 3/347 (2006.01)

Patent

CA 1121497

41 PR 3217 ABSTRACT OF THE DISCLOSURE A conventional residential ground fault circuit interrupting (GFCI) device is utilized to control a tradi- tional circuit breaker in protecting a large power distri- bution circuit against ground faults. The GFCI device is adapted with a switch which closes incident to tripping of the GFCI device. The switch controls energization of a shunt trip solenoid adapted to the circuit breaker. A ground fault sensor responds to ground faults on the distribution circuit by injecting a current imbalancing signal into the GFCI device, causing it to trip. The switch then closes to energize the solenoid, shunt tripping the circuit breaker to clear the distribution ground fault.

310430

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