Circuit breaker contact arm and spring shield

High-voltage switches with arc preventing or extinguishing devic – Arc preventing or extinguishing devices – Contact structure

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Details

218 27, 218 32, 218 34, 218 41, 218 89, 335201, H01H 930

Patent

active

057808007

ABSTRACT:
An arc isolation shield for molded case circuit breakers is inserted between the circuit breaker case and cover and attached to one leg of the operating cradle. The knee of the circuit breaker moveable contact arm contacts the bottom of the shield and moves the shield in unison with the contact arm to protect the contact arm, contact braid and operating spring upon contact separation under severe overcurrent conditions.

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patent: 5581063 (1996-12-01), Clark

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