Circuit breaker with detachable tripping tester

Details Circuit breaker with detachable tripping tester Circuit breaker with detachable tripping tester

1991-02-25

1992-12-22

Stephan, Steven L.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 92, 361 96, H02H 100

Patent

active

051738333

ABSTRACT:
In a circuit breaker having an instant time tripping test function, terminals which are connected to an electric power source of a control circuit of the circuit breaker and a quasi over-current signal generating circuit for tripping test are provided on a front face of a housing of the circuit breaker, and a widely usable detachable tripping tester comprising a D.C. power source and a switch is connected to the terminals, thereby a predetermined voltage is applied to the electric power circuit and the quasi over-current signal generating circuit for testing a tripping mechanism.

REFERENCES:
patent: 3924160 (1975-12-01), Maier et al.
patent: 4105965 (1978-08-01), Russell
patent: 4803434 (1989-02-01), Walker
patent: 4873603 (1989-10-01), Ishii

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