Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific circuit breaker or control structure
Reexamination Certificate
2007-09-04
2007-09-04
Jackson, Stephen W. (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific circuit breaker or control structure
C361S062000
Reexamination Certificate
active
10858649
ABSTRACT:
A drive circuit, such as an electronic trip device, is for a shunt trip coil of a network protector. The drive circuit includes an alternating current input adapted to receive an alternating current voltage and a first half-wave rectifier adapted to provide a plurality of direct current voltages from the alternating current input. An energy store, such as a plurality of electrolytic capacitors, is adapted to provide a first direct current output from the direct current voltages of the first half-wave rectifier. A sensor circuit monitors the alternating current input and the first direct current output and provides a second output from one of the alternating current input and the first direct current output. A second full-wave rectifier responds to the second output and the trip signal to provide a third direct current output adapted to drive the network protector shunt trip coil.
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Eaton Electrical, Inc., “Capacitor Trip Device” Model CTD-5, Mar. 1999, 2 pp.
Eaton Corporation
Jackson Stephen W.
Moran Martin J.
Nguyen Danny
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