Surge suppression and fault containment circuit and packaging th

Electricity: electrical systems and devices – Safety and protection of systems and devices – Circuit interruption by thermal sensing

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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.

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patent: 4038584 (1977-07-01), Tarchalski
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patent: 4408248 (1983-10-01), Bulley et al.
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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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