DocumentCode :
3520584
Title :
Failure modes and field testing of medium voltage motor windings
Author :
Gleichman, Robert
fYear :
2001
fDate :
18-22 June 2001
Firstpage :
92
Lastpage :
95
Abstract :
Reliable electrical motor performance is vital to profitable plant operation. Although motor maintenance spending constitutes the largest component (50-70%) of electrical maintenance budgets, its cost is relatively small compared to the lost opportunity costs of most driven equipment in pulp and paper processes. Based upon a 1983 EPRI study, 37% of electrical motor failures can be attributed to stator problems. The other 63% (rotating assemblies, including bearings) are susceptible to imbalance, misalignment, and other mechanical problems that can be diagnosed and mitigated through the proper application of vibration monitoring, tribology, and other well known practices. This paper focuses on evaluating the condition of stator windings. To minimize the cost of motor ownership and optimize opportunity, it is essential to have a reasonable understanding of a motor´s condition and its residual life. This can be accomplished using several different testing methods, ranging from on-line monitoring to off-line testing. One word of warning is in order. Although many popular test methods are valid, some are misleading and of little practical value. What follows is an explanation of common winding failure modes, and some results of common tests and technologies.
Keywords :
computerised monitoring; condition monitoring; electric motors; failure analysis; machine testing; stators; EPRI study; bearings; common tests; common winding failure modes; electrical motor failures; electrical motor performance; failure modes; field testing; imbalance; mechanical problems; medium voltage motor windings; misalignment; motor condition; motor maintenance spending; motor ownership cost reduction; off-line testing; on-line monitoring; residual life; rotating assemblies; stator problems; tribology; vibration monitoring; Capacitance; Dielectrics and electrical insulation; Maintenance; Medium voltage; Moisture; Partial discharges; Pollution; Surface contamination; Surface discharges; Testing;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Pulp and Paper Industry Technical Conference, 2001 Conference Record of.
Conference_Location :
Portland, OR, USA
Print_ISBN :
0-7803-6745-6
Type :
conf
DOI :
10.1109/PAPCON.2001.952952
Filename :
952952
Link To Document :
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