Ground fault detector circuit with high current inhibit

Details Ground fault detector circuit with high current inhibit Ground fault detector circuit with high current inhibit

H - Electricity

02

H

348/26, 318/67,

H02H 7/085 (2006.01) H02H 3/347 (2006.01) H02H 7/22 (2006.01)

Patent

CA 1036670

GROUND FAULT DETECTOR CIRCUIT WITH HIGH CURRENT INHIBIT Abstract of the Disclosure A current transformer couples to the power lines leading to a motor starter and it generates a current pro- portional to the current which flows as a result of ground faults. When the ground fault current reaches a first level, the circuit is tripped and a circuit breaker deenergizes the motor starter. When the ground fault current reaches a second, much higher, level the circuit is inhibited from operating to allow circuit interrupting devices in the motor starter to interrupt the circuit to the motor.

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