US PATENT SUBCLASS 361 / 81
.~.~.~.~ With communication means between disconnect points

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  DF  .~.~ Voltage and current {3}
80  DF  .~.~.~ Distance relaying {1}
81.~.~.~.~ With communication means between disconnect points

DEFINITION

Classification: 361/81

With communication means between disconnect points:

(under subclass 80) Subject matter wherein a communication means sends a coded message between disconnect points indicating that a fault condition exists.

SEE OR SEARCH THIS CLASS, SUBCLASS:

64, and 66, for communication circuits in feeder networks.

68+, for communication circuits in series connected sections.