Compact circuit breaker

Details Compact circuit breaker Compact circuit breaker

1991-12-20

1993-08-31

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

With housing or support means

335185, 335132, H01H 902

Patent

active

052412903

ABSTRACT:
The low dissipation compact circuit breaker of the present invention selectively conducts breaker current in a circuit to be protected. The compact circuit breaker is in an enclosure surrounding at least a stationary contact and a moveable contact. This moving contact selectively assumes one of two bistable states, a contiguous closed state or a noncontiguous open state. A rotary operator including rotary members and a contact lever train selectively causes the stationary contact and the moveable contact to assume either a closed or an open state. A single solenoid for sensing breaker current in each phase causes the rotary operator to move the contacts from a closed state to an open state. Additionally, the solenoid for a faulted phase directly acts on a solenoid bell crank to cause the contact to begin to assume an open state in a trip operation, if breaker current reaches a preselected trip value in the faulted phase. The rotary operator causes all contacts to move from a closed to an open position by initiating a trip operation in the contact lever trains.

REFERENCES:
patent: 3772620 (1973-11-01), Harris
patent: 3851284 (1974-11-01), Yoshino et al.

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