Rewind of Large Electric Motors for the Petroleum Industry

This paper attempts to establish a philosophy for a systematic approach to repairs and redesign of large electric motors used by the petroleum industry in pipeline pumping duty. Motor performance requirements of pipeline systems are used as a basis for electric motor repairs and/or redesign. Electric motor failures are analyzed to establish whether failure was inherent in the original design or operational. Rebuilding techniques are indicated which attempt to overcome inherent failure by redesign and operational failure by the use of more adequate technology and workmanship. Rotor, stator, bearing, and enclosure problems are covered. Basic reasons for rerating motors are discussed. The need for absolute integrity in the repair of motors installed in hazardous locations is stressed.