US PATENT SUBCLASS 340 / 646
.~.~.~ Transformer

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

500  DF  CONDITION RESPONSIVE INDICATING SYSTEM {6}
540  DF  .~ Specific condition {18}
635  DF  .~.~ Condition of electrical apparatus {15}
646.~.~.~ Transformer

DEFINITION

Classification: 340/646

Transformer:

(under subclass 635) Subject matter where the monitored device is a transformer.

SEE OR SEARCH THIS CLASS, SUBCLASS:

584+, for alarms responsive to thermal condition of a transformer.

SEE OR SEARCH CLASS

324, Electricity: Measuring and Testing,

726, for transformer testing.

361, Electricity: Electrical Systems and Devices, 35+, for transformer safety systems and subclass 93.6 for abnormal current condition detection using transformer sensor.