Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – For fault location
Patent
1989-03-31
1990-10-30
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
For fault location
455232, 324528, G01R 3112, G01R 3108
Patent
active
049671588
ABSTRACT:
A portable detector device for detecting partial electrical discharge in live voltage distribution cables and/or equipment. The device comprises a probe secured to an insulated portable handle for manual displacement of the probe. A detector device is connected to the probe for detecting a signal in the range of 5 to 10 MHz emitted by the partial discharge. The detector has an input attenuator circuit which is connected to the probe to lower the level of the detected signal to a desired level. A transformation circuit is further provided to change the detected signal to a predetermined frequency signal substantially free of noise and representative of the magnitude of the detected partial discharge signal. An amplifier circuit amplifies the predetermined frequency signal and an output circuit generates signals indicative of the presence and magnitude of the partial discharge.
REFERENCES:
patent: 3453533 (1969-07-01), Cox
patent: 4006410 (1977-02-01), Roberts
patent: 4775839 (1988-10-01), Kosina
Eisenzopf Reinhard J.
Hydro-Quebec
Solis Jose M.
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