Unitized combination starter

Details Unitized combination starter Unitized combination starter

1979-02-12

1981-03-24

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335 16, 335195, H01H 7300, H01H 7710

Patent

active

042583438

ABSTRACT:
A unitized combination starter is constructed with circuit breaker and contactor sections, each of which is provided with a pair of spaced stationary contacts and a cooperating movable bridging contact. The bridging contacts are closely spaced, are parallel and carry currents which flow in opposite directions. Under severe fault conditions a strong blowoff effect is created to force both bridging contacts in their respective contact opening directions. This quickly places four air gaps in the current path to severely limit current rise and thereby facilitate circuit interruption.

REFERENCES:
patent: 3987382 (1976-10-01), Cataldo et al.
patent: 4031492 (1977-06-01), Wafer
patent: 4039983 (1977-08-01), Terracol et al.

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