3.1 Introduction The reliability and trouble free service of a motor depend on the superiority of its electrical and mechanical design, the accuracy and care with which the components are manufactured and assembled and on the stringency with which the motor is tested at the manufacturer’s works and at the site of installation. The operational duty requirements of motors vary from application to application.For common applications like fans, pumps, small flour mills etc. the motors may have standard characteristics. But for special applications like cranes, hoists, lifts, power press, machine tools,power station auxilliary etc. and for industries like coal mining, oil refineries, paper plants, sugar industry, cement industry, lift irrigation etc. specially designed motors with read more

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