Minimizing idle/redundant running of motors
Channel: Pankaj Mohan
Date: 30/06/2020

Idle /redundant running leads mainly to following: 1) Loss of energy as the no load power drawn is approximately about 12 % to 16 % of rated power output in most of motors.2) Un Un-necessary heat production at friction points as bearings leading to wearing of bearing.3) Motor being inductive load the pf of such running is low leading to unnecessary line losses.4) Reduction in overall system energy efficiency over period of time

Hence avoiding long periods of such operation of motors is needed to maintain a higher energy efficiency of operation.

This can be achieved by,
switching off the motors during such extended periods of operation.
Operating the motors at low voltages just to keep them running near their normal  speeds.
Redundant running implies the equipment is working without any effect on the production quantity or quality. Unless these are operating for safety consideration stoppage of these motors can lead to large saving