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What is and why use a Variable Speed Drive?....

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Electric motor systems are major energy users, many are not controlled efficiently.

A Variable Speed Drive (VSD) is a power electronic device used to control the speed of an electric motor.  Most motors are connected directly to the main supply and run a full speed only.  A VSD enables the motor to be operated at a different speed or speeds matched to the requirement of the process.

In most fan and pump applications, because energy consumption and motor speed are exponentially related, even a relatively small reduction in speed can result in significant energy and operating cost reductions.  A 10% speed reduction will result in a 30% energy saving; similarly a 20% speed reduction will save 50% in energy and operational costs!

Results are instantaneous and payback periods are very short, typically under 2 years.


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