US PATENT SUBCLASS 361 / 47
.~.~ In a polyphase system

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  DF  .~ Ground fault protection {5}
47.~.~ In a polyphase system {1}
48  DF  .~.~.~> With more than three wires

DEFINITION

Classification: 361/47

In a polyphase system:

(under subclass 42) Subject matter wherein the load in a polyphase system is protected from an unintentional grounding usually by removing the power from the load when a ground fault is detected by a sensing means.