Undervoltage release reset and lockout apparatus

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

H - Electricity

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H01H 73/00 (2006.01) H01H 75/00 (2006.01) H01H 83/00 (2006.01) H01H 83/12 (2006.01) H01H 71/10 (2006.01) H02H 7/22 (2006.01)

Patent

CA 1154056

41PR-6139 UNDERVOLTAGE RELEASE RESET AND LOCKOUT APPARATUS ABSTRACT OF THE DISCLOSURE In a circuit breaker equipped with a hook re- leaseably holding movable contacts in a hooked open position, the plunger of an undervoltage release solenoid is releaseably 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 operat- ing 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.

380227

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