Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific voltage responsive fault sensor
Reexamination Certificate
2005-03-01
2005-03-01
Jackson, Stephen W. (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific voltage responsive fault sensor
C361S035000
Reexamination Certificate
active
06862162
ABSTRACT:
A thyristor provides overcurrent protection to a low impedance load, such as a transformer, by adding a resistance in series with the transformer winding. As overcurrents attempt to pass through the transformer winding, a sufficient voltage is generated in the transformer so that a thyristor connected thereacross is triggered into conduction. A resistance formed between the thyristor gate and cathode establishes the threshold of current that can pass through the transformer winding before the thyristor is triggered. When triggered into conduction, the thyristor shunts the current and the transformer is thus protected.
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Chauza Roger N.
Chauza & Handley LLP
Demakis James A
Jackson Stephen W.
TECCOR Electronics, LP
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