Motor operator with burn-out protection

Details Motor operator with burn-out protection Motor operator with burn-out protection

1997-12-05

1999-05-18

Walczak, David J.

Electricity: circuit makers and breakers

Electric switch details

Actuators

2003321, H01H3/20

Patent

active

059052392

ABSTRACT:
A motor operator for a circuit breaker has a motor driven carriage which engages a circuit breaker handle and drives it between an on position and a reset position beyond off. When the carriage drives the handle to the on position, an on limit switch is actuated to deenergize the motor. A fastener releasably secures a bracket slidably mounted on the carriage to a fixed member when the carriage reaches the on position of the handle so that if the circuit breaker is not reset and rebounds toward a trip position, the bracket is extended and maintains actuation of the on limit switch. Hence, the motor is not repeatedly energized and burned out in unsuccessful attempts to turn on the circuit breaker. A similar arrangement prevents the motor from cycling when the off relay is latched.

REFERENCES:
patent: 550429 (1895-04-01), Baginski et al.
patent: 5196658 (1993-03-01), Gula
patent: 5354960 (1994-10-01), Erickson
patent: 5475190 (1995-12-01), Smith et al.

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