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Joined: Nov 2004
Posts: 53
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I recently went on a service call for some high bays. While up in the lift I noticed the electric unit heaters had 277V nameplates but were installed in a building with 240V. No 277V is available.
(The motors are 277V rated as well)
The customer says they are about two years old?
Any thoughts as to potential problems?
Thanks
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Joined: May 2002
Posts: 1,716
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Is there a chance that there are some Buck/Boost transformers somewhere?
We have done this before for this very situation.
Roger
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Joined: Nov 2004
Posts: 53
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No Transformer Roger,
Small building, panel in sight of heaters.
I checked to see if there was one hiding.
Thanks
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Joined: Dec 2005
Posts: 873 Likes: 4
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You won't get you maximum power output for heating.
240 volts is 86 % of 277 volts.
By V²/R you only get 75% of your heating capacity.
For the motors it depends if they have to start a heavy load or not.
If it is only to drive a fan i can't see any problems with it.
The product of rotation, excitation and flux produces electricty.
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Joined: Nov 2005
Posts: 826 Likes: 1
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I doubt that you will have any problems but it wouldn't hurt to contact the mfg. to put your mind at ease.
Joe
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Joined: Feb 2004
Posts: 1,440
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Only thing I can think of would be a conflict of something meant to run with a grounded phase vs. phase to phase... I'm not sure if this would be an issue in your case though...
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Posts: 1,803
Joined: March 2005
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