Electricity: electrical systems and devices – Safety and protection of systems and devices – Load shunting by fault responsive means
Reexamination Certificate
2007-11-20
2007-11-20
Sherry, Michael (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
Load shunting by fault responsive means
C361S057000, C361S091100, C323S272000, C323S285000
Reexamination Certificate
active
11199644
ABSTRACT:
A protection circuit for a parallel power system having at least two parallel coupled voltage regulators is disclosed. The protection circuit includes at least two isolation control circuits, each control circuit being coupled to a respective voltage regulator. Each isolation control circuit includes a current sense circuit for sensing current polarity at an output of the respective voltage regulator, and a controller for automatically isolating the respective voltage regulator when an over-voltage condition exists at an output of the parallel power system and a positive current polarity is sensed at the output of the respective voltage regulator. The at least two isolation control circuits isolate only a voltage regulator having positive current outflow during the over-voltage condition. In one embodiment, each isolation control circuit further includes an over-voltage detection circuit for detecting when the over-voltage condition exists at the output of the parallel power system.
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Covi Kevin R.
Harrington Raymond J.
Makowicki Robert P.
Shevach Steven G.
Sorenson Dale F.
Esq. Lily Neff
Heslin Rothenberg Farley & & Mesiti P.C.
Mai Tien
Radigan, Esq. Kevin P.
Sherry Michael
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