NDLI: An advanced technique for detecting inter-laminar stator core faults in large electric machines

Content Provider	IEEE Xplore Digital Library
Author	Sang Bin Lee Kliman, G.B. Shah, M.R. Mall, W.T. Nair, N.K. Lusted, R.M.
Copyright Year	1972
Abstract	An advanced technique for detecting incipient inter-laminar insulation failure in stator cores of large electric machines is proposed in this paper. The proposed scheme is an offline method based on low flux stator core excitation that employs a new probe. An iron-core probe is placed in the wedge depression area of the stator and scanned axially to detect the variation in the measured flux due to a fault. Two fault indicators that provide clear indication on fault severity and location are proposed in this paper. A 120-MW ac machine stator was tested under a number of intentionally inserted fault conditions using portable field equipment recently developed. The experimental results show that the fault existence, location, and severity can be determined reliably using the proposed scheme. It is also shown that the fault detection sensitivity and reliability, inspection speed, and user convenience are significantly enhanced.
Sponsorship	IEEE Industry Applications Society
Starting Page	1185
Ending Page	1193
Page Count	9
File Size	1648127
File Format	PDF
ISSN	00939994
Volume Number	41
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electrical fault detection Stator cores Electric machines Probes Dielectrics and electrical insulation Area measurement AC machines Testing Fault detection Inspection stator core inspection fault diagnostics inter-laminar insulation failure regular maintenance stator core fault
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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