Undervoltage release reset and lockout apparatus

Details Undervoltage release reset and lockout apparatus Undervoltage release reset and lockout apparatus

1980-06-23

1981-11-17

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

200153SC, 335 26, H01H 7300, H01H 7502, H01H 8300

Patent

active

043014348

ABSTRACT:
In a circuit breaker equipped with a hook releasably holding movable contacts in a hooked open position, the plunger of an undervoltage release solenoid is releasably latched in its seated position to inhibit premature tripping of the breaker latch and thus enable the operating mechanism to be charged. Articulation of the hook leading to release of the contacts from their hooked open position precipitates unlatching of the plunger and discharge of the operating mechanism to preclude breaker closure into an undervoltage condition. Resetting of the plunger is effected under the control of the operating mechanism by a separate spring-power reset arm.

REFERENCES:
patent: 4075584 (1978-02-01), Castonguay et al.
patent: 4166989 (1979-09-01), Castonguay et al.
patent: 4211989 (1980-07-01), Acampora
patent: 4251702 (1981-02-01), Castonguay et al.

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