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How does using a variable speed drive reduce energy consumption?

KB Electronics, Inc. Manufacturer of AC Drives, DC Drives & Variable Speed Controls


Installing a variable speed drive allows direct control of the motor output speed to meet the application demands. As the speed is reduced, the power required decreases. By operating the system at the lowest possible speed required for the application, energy consumption is reduced.  For example, at 80 percent speed, only 51 percent of full load power is required to drive a pump or a fan. 

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