Multipole electrical circuit breaker with improved interchangeab

Details Multipole electrical circuit breaker with improved interchangeab Multipole electrical circuit breaker with improved interchangeab

1979-06-11

1981-06-30

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335 23, 335 40, H01H 7348

Patent

active

042765277

ABSTRACT:
A molded case multi-pole circuit breaker comprises an interchangeable trip unit having a magnetic circuit surrounding a main stationary conductor and provided with a U-shaped core secured to circuit-breaker assembly and a magnetic rod fastener to the trip unit. The rod is inserted between the legs of the core, and a single turn secondary winding surrounds the rod. A bimetal is attached to the winding, and the thermal tripping characteristics are independent of the relative position of the magnetic core and rod.

REFERENCES:
patent: 2939929 (1960-06-01), Hobson, Jr.
patent: 3296564 (1967-01-01), Cellerini
patent: 3693122 (1972-09-01), Willard

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