US PATENT SUBCLASS 361 / 79
.~.~ Voltage and current

Current as of: June, 1999
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361 /   HD   ELECTRICITY: ELECTRICAL SYSTEMS AND DEVICES

1  DF  SAFETY AND PROTECTION OF SYSTEMS AND DEVICES {32}
78  DF  .~ With specific quantity comparison means {5}
79.~.~ Voltage and current {3}
80  DF  .~.~.~> Distance relaying {1}
82  DF  .~.~.~> Reverse energy responsive (e.g., directional)
83  DF  .~.~.~> With time delay protective means

DEFINITION

Classification: 361/79

Voltage and current:

(under subclass 78) Subject matter wherein the fault sensor is responsive to abnormal voltage and current conditions in the load circuit.

SEE OR SEARCH THIS CLASS, SUBCLASS:

30, for combined voltage and current sensitive control circuits in motor protection systems.

65, for combined voltage and current sensitive control circuits in feeder distribution networks.