NDLI: Behavior of machine insulation systems subjected to accelerated thermal aging test

Content Provider	IEEE Xplore Digital Library
Author	Farahani, M. Gockenbach, E. Borsi, H. Schäfer, K. Kaufhold, M.
Copyright Year	1994
Abstract	Accelerated aging tests have been extensively used on motor and generator insulation systems to simulate in a short time period the deterioration mechanisms occurring during normal operation of many years, to identify insulation system designs with longer life time and to support the qualification of a new system. The contribution presents results from extensive investigations on the behavior of two VPI machine test insulation systems (reference and candidate) with thermal class F (155°C), which were subjected to three thermal overstresses in repeated cycles. After each thermal cycle the insulation system is subjected to mechanical stress, moisture, and voltage. In order to check the condition of the insulation systems in a non-destructive manner several properties of insulation like dissipation factor, insulation resistance and partial discharge quantities were measured after each thermal cycle. After that the end of life of the insulation systems were checked with ac voltage and impulse voltage. The results support the qualification by comparative evaluation and they indicate, how the changes in electrical and dielectric properties of insulation take place during the accelerated aging test.
Sponsorship	National Natural Science Foundation of China (NSFC) Region Centre Ville de Tours Conseil General D'Indre et Loire ABB IEEE Sandia National Laboratories TOSHIBA
File Size	1466510
File Format	PDF
ISSN	10709878
Volume Number	17
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Insulation Aging Stress Voltage measurement Capacitance Thermal stresses Breakdown voltage Insulation Testing, Functional Test, Thermal Evaluation Rotating Machine Insulation, Qualification, Accelerated Thermal Aging Partial Discharge, Dissipation Factor, Insulation Resistance, Diagnosis
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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