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A new technique to diagnose the oil-filled transformers based on the condensing analysis for very small decomposed products in insulating oil

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4 Author(s)
T. Ishii ; Tokyo Electr. Power Co. Inc., Japan ; T. Oshi ; Y. Makino ; T. Hara

Analysis of gases dissolved in insulating oil offers the most important and efficient diagnostic method to detect the faults in oil-filled transformers. We carried out a survey of decomposed products from various kind of solid-materials through simplified model tests and current using model tests. The gas chromatography-mass spectrometer and the purge/trap gas extraction equipment are employed to condense and analyze very small decomposed products. As a result, we found out effective decomposed products for diagnosis. This paper describes the new technique for diagnosis based on the decomposed products utilizing the condensing analysis with a view to early detection and location of abnormal part in oil-filled transformers.

Published in:

Transmission and Distribution Conference and Exhibition 2002: Asia Pacific. IEEE/PES  (Volume:3 )

Date of Conference:

6-10 Oct. 2002