US PATENT SUBCLASS 361 / 42
.~ Ground fault protection

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}
42.~ Ground fault protection {5}
43  DF  .~.~> Fault suppression (e.g., Petersen coil)
44  DF  .~.~> With differential sensing in a polyphase system
45  DF  .~.~> With differential sensing in a single phase system {1}
47  DF  .~.~> In a polyphase system {1}
49  DF  .~.~> In a single phase system {1}

DEFINITION

Classification: 361/42

Ground fault protection:

(under subclass 1) Subject matter with means for sensing ground faults and for preventing damage to a system or device due to the ground fault.

(1) Note. A ground fault is a defect in a wire circuit due to unintentional grounding.

SEE OR SEARCH THIS CLASS, SUBCLASS:

107+, for specific transmission line with ground conductor.

SEE OR SEARCH CLASS

340, Communications: Electrical,

650+, for ground detectors with indicator only.