Surge suppression and fault containment circuit and packaging th

Details Surge suppression and fault containment circuit and packaging th Surge suppression and fault containment circuit and packaging th

1991-02-13

1993-07-20

Stephan, Steven L.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Circuit interruption by thermal sensing

361 55, 361 56, 361103, 361111, H02H 900

Patent

active

052299090

ABSTRACT:
There is provided a circuit that protects the electronic tripping circuitry of a circuit breaker system from external transient high voltages and prolonged high voltage faults. The circuit preferably includes a transzorb that conducts in response to receiving a voltage signal having a magnitude greater than the breakdown voltage of the transzorb. This transzorb clamps the output voltage to its breakdown voltage. The circuit also includes a fuse that is designed to blow in response to a prolonged high voltage fault.

REFERENCES:
patent: 3527985 (1967-10-01), Brown
patent: 3968472 (1976-07-01), Taylor
patent: 4038584 (1977-07-01), Tarchalski
patent: 4089032 (1978-05-01), Dell'Orfano
patent: 4114054 (1978-09-01), Seo et al.
patent: 4408248 (1983-10-01), Bulley et al.
patent: 4554609 (1985-11-01), Ruehl et al.
patent: 4626834 (1986-12-01), Caruthers
patent: 4654743 (1987-03-01), Ruehl et al.
patent: 4979071 (1990-12-01), Ito et al.
patent: 5014156 (1991-05-01), Bruch et al.

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