Electricity: electrical systems and devices – Safety and protection of systems and devices – Ground fault protection
Patent
1997-12-16
2000-05-09
Leja, Ronald W.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Ground fault protection
335 38, H02H 300
Patent
active
060612177
ABSTRACT:
A circuit breaker includes separable contacts for movement between a closed position and an open position to switch electrical current. An operating mechanism moves the separable contacts between the closed and open positions. A sensor senses the electrical current and outputs a sensed current signal corresponding to the electrical current. A shunt shunts a portion of the electrical current. A trip mechanism employs the sensed current signal to produce a trip signal. A trip actuator trips the operating mechanism to move the separable contacts to the open position. The trip actuator includes a trip solenoid having a coil energized by the trip signal and also includes one or more loops energized by the shunted portion of the electrical current.
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Beatty William E.
Beck H. Richard
Ellsworth James P.
Groves David H.
Grunert Kurt A.
Eaton Corporation
Leja Ronald W.
Moran Martin J.
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