Circuit breaker having thermal and solid state trip means

Details Circuit breaker having thermal and solid state trip means Circuit breaker having thermal and solid state trip means

1976-04-12

1977-07-26

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335 43, 335172, 337 70, 361115, H01H 7300, H01H 7348

Patent

active

040386180

ABSTRACT:
A molded case multi-pole circuit breaker is provided with a solid state trip unit constructed to automatically open the breaker responsive to predetermined fault current conditions. In addition, a bimetal actuated device sensitive to air temperature within the breaker housing is provided for automatically opening the breaker when air temperature within the housing exceeds a predetermined level.

REFERENCES:
patent: 2955182 (1960-10-01), Caswell et al.
patent: 3636410 (1972-01-01), Pardini
patent: 3826951 (1973-01-01), Mater et al.

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