Multiple current-limiting circuit breaker with electrodynamic re

Details Multiple current-limiting circuit breaker with electrodynamic re Multiple current-limiting circuit breaker with electrodynamic re

1994-03-21

1995-11-21

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335 8, 218 22, H01H 7500

Patent

active

054691214

ABSTRACT:
A multipole circuit breaker having a movable contact for each pole, the movable contact being biased by a spirally-wound spring including a feeler part which slides on a bearing surface of the movable contact to modify the application point of a pressure force P in a second active repulsion position, resulting in a decrease of the restoring torque before operation of the mechanism. The movable contact is forked-shaped and is articulated on an eccentric spindle parallel to the rotation axis of the bar. The spirally-wound spring is mounted to float in the recess of the bar, and comprises two helicoidal wire windings.

REFERENCES:
patent: 4480242 (1984-10-01), Castonguay et al.
patent: 4714907 (1987-12-01), Bartolo et al.
patent: 4745384 (1988-05-01), Toda et al.
patent: 4782583 (1988-11-01), Castonguay et al.
patent: 4845459 (1989-07-01), Manthe et al.
patent: 5073764 (1991-12-01), Takahashi et al.

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