COMPREHENSIVE LOW-VOLTAGE MOTOR SPECIFICATIONS

This paper describes the circumstances and reasoning leading to the de velopment of a comprehensive specification for low-voltage motors thro ugh NEMA frame size 447 (250 hp). The paper includes a brief explanati on of an overall approach to the creation, management, and use of a gu ide specification database using extensive imbedded notes to the speci fier, The paper also summarizes a practical approach for specifying an d applying these motors pith variable frequency drives, including thei r application in hazardous locations. Enclosures, bearings, speed, eff iciency, vibration, insulation, housing construction, grounding, servi ce factor, and warranty are all dealt with in a practical, comprehensi ve manner.