Multi-pole circuit breaker with interchangeable magneto-thermal

Details Multi-pole circuit breaker with interchangeable magneto-thermal Multi-pole circuit breaker with interchangeable magneto-thermal

1982-04-29

1984-08-21

Miller, J. D.

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335 42, 335176, H01H 7306

Patent

active

044672977

ABSTRACT:
The present invention relates to a multi-pole circuit breaker with an interchangeable magneto-thermal tripping unit electrically and mechanically connected to the breaker unit by means of connecting screws. The connecting lugs of the breaker unit are positioned with vertical play in transverse slots in the breaker unit casing and are electrically connected to the movable contacts by flexible connections. When the connecting screws are tightened the breaker unit connecting lugs are shifted to bear on the associated tripping unit lugs irrespective of any positioning defects. A reset spring of the electro-magnetic tripping device is anchored on one end on the armature and on the other end to the tripping device adjusting bar.

REFERENCES:
patent: 3211860 (1965-10-01), Stephenson, Jr. et al.
patent: 3260822 (1966-07-01), Stephenson et al.
patent: 3264435 (1966-08-01), Klein et al.

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