NDLI: A new diagnostic tool for determining and locating wet electrical insulation

Content Provider	IEEE Xplore Digital Library
Author	Krahn, J.R.
Copyright Year	2000
Description	Author affiliation: GE Corp. R&D, Niskayuna, NY, USA (Krahn, J.R.)
Abstract	Leaking water coolant into stator electrical insulation is a growing concern for the aging liquid-cooled generator fleet since wet insulation poses a safety risk to continued operation. Present leak detection or monitoring methods suffer from one or more weaknesses: lack of locational specificity, poor sensitivity or selectivity, and/or inability to be implemented on-line. A new technology has been developed to address these needs (the "Wet Bar Detector" (WBD)). This report will briefly discuss the background of the water-leak problem and provide a brief survey of the present technology commercially available for detecting and/or monitoring water leaks or wet insulation. Next, a statistical analysis and comparison is presented benchmarking the performance of the WBD versus capacitance mapping. A prototype field instrument has been built and beta-testing is underway (off-line) on generators with suspected water coolant leak problems. Preliminary field data is presented.
Starting Page	524
Ending Page	527
File Size	465712
Page Count	4
File Format	PDF
ISBN	0780359313
ISSN	1089084X
DOI	10.1109/ELINSL.2000.845563
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-04-05
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Coolants Dielectrics and electrical insulation Leak detection Monitoring Stators Aging Dielectric liquids Electrical safety Statistical analysis Capacitance
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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