Voltage Reduction and Energy Saving

Hi, I would like to have your opinions about voltage reduction and energy saving. There are some devices (voltage controllers)  that reduce the supplied voltage in load. Seems that it works for fluorescent lighting and for induction motors (not for those who are driven by VSD and loaded at 80%) but I would like to hear any comment referred to your knowledge or experience.


asked 8/22/2013
Vangelis Grivakis3
Vangelis Grivakis

2 Answers

This answer has been selected by the question author as the best answer.

I don't think this is a one shoe fits all type solution that some people say it is. 

Reducing voltage generally will reduce the power, but potentially produces other effects which may offset an gains (heaters may need to run longer, light levels may decrease requiring more fittings, torque will reduce on motors etc.).    I guess it could be useful if applied in selective situation and where the voltage is for some reason to high for the design condition.  You would also need to ensure that any device does not result in the voltage dropping below the minimum imposed by manufacturing standards.

To me, designing the electrical system itself to deliver an optimized performance would be the best way forward.  Adding a device to cater for what is perceived as an electrical system design shortfall, is not something I intuitively like.

answered 8/26/2013 Steven McFadyen 246
Steven McFadyen
I have heard it works on lighting.
answered 9/1/2013 EE65 19

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