Power apparatus, power transmission/distribution unit, and tripp

Details Power apparatus, power transmission/distribution unit, and tripp Power apparatus, power transmission/distribution unit, and tripp

1990-08-29

1992-06-23

Ng, Jin F.

Communications: electrical

Condition responsive indicating system

Specific condition

340644, 324551, 361131, G08B 2100

Patent

active

051246872

ABSTRACT:
A power apparatus in which a particle in an enclosure of the apparatus containing an electric conductor therein is moved in the enclosure by an electric field so as to cause an abnormality of insulation. The apparatus includes a first sensor for detecting an existence position of the particle on the basis of a sound of collision of the particle against the enclosure, a second sensor for detecting a partial discharge generated in the enclosure, and a device for receiving respective detection signals from the first and second sensors, for judging the existence of insulation abnormality caused by the particle inside the enclosure, and for outputting a result of the judgment.

REFERENCES:
patent: 3881766 (1975-05-01), Pratsch
patent: 4709291 (1987-11-01), Eggert et al.
patent: 4757263 (1988-07-01), Cummings, III et al.
patent: 4975800 (1990-12-01), Oshita

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