US PATENT SUBCLASS 361 / 82
.~.~.~ Reverse energy responsive (e.g., directional)

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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}
82.~.~.~ Reverse energy responsive (e.g., directional)

DEFINITION

Classification: 361/82

Reverse energy responsive (e.g., directional):

(under subclass 79) Subject matter wherein the fault sensing means responds to the flow of energy which is reversed with respect to the normal direction of flow.

SEE OR SEARCH THIS CLASS, SUBCLASS:

84, for similar subject matter wherein the quantities compared are not specifically voltage and current.

SEE OR SEARCH CLASS

307, Electrical Transmission or Interconnection Systems,

127, for polarity, phase sequence or reverse flow responsive switching systems.