Electric circuit breaker with electromagnetic-assist means for o

Details Electric circuit breaker with electromagnetic-assist means for o Electric circuit breaker with electromagnetic-assist means for o

1975-09-15

1977-06-28

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Contact-actuating means

335147, H01H 342

Patent

active

040328708

ABSTRACT:
An electric circuit breaker comprises first and second contacts, which engage each other while the circuit breaker is fully closed and both of which are movable. During the initial portion of an opening operation, the two contacts move together and remain engaged. First electromagnetic-assist means develops while the contacts are engaged a magnetic force on the first contact varying directly with current through the contacts which urges the first contact toward the second contact. Second electromagnetic-assist means develops while the contacts are engaged a magnetic force on the second contact varying directly with current through the contacts which urges the second contact toward the first contact. Means is provided to block motion of the first contact with the second contact after initial opening motion of the second contact and to prevent during subsequent opening motion of the second contact the transmission of force from the first electromagnetic-assist means to the second contact.

REFERENCES:
patent: 2821594 (1958-01-01), Latour
patent: 3225160 (1965-12-01), Barkan
patent: 3366900 (1968-01-01), Barkan
patent: 3555223 (1971-01-01), Robinson
patent: 3663906 (1972-05-01), Barkan et al.

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