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Kristi27
Joined: 20 Nov 2007 Posts: 1 Location: Boston
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Posted: Tue Nov 20, 2007 11:32 pm Post subject: Variac primary voltage rating 220 - can it be used on 110? |
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Variac/powerstat/autotransformer etc.
Can I successfully use one rated at 220/240, to vary a 110/120 volt line?
(60HZ, single phase)
looking to lower 128 overvoltage to a more reasonable 120 or so.
tia! |
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torbjorn
Joined: 07 Jun 2007 Posts: 370 Location: Sweden
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Posted: Wed Nov 21, 2007 12:45 pm Post subject: |
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Yes indeed, just make sure that you don't overload the variac. Remember that the current rating remains unchanged when you run it from a lower mains voltage, but you should not load it with more than half its rated power. |
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Guest
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Posted: Wed Nov 21, 2007 6:22 pm Post subject: |
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Thanks! |
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Guest
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Posted: Mon Dec 03, 2007 5:41 pm Post subject: |
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torbjorn wrote: | Yes indeed, just make sure that you don't overload the variac. Remember that the current rating remains unchanged when you run it from a lower mains voltage, but you should not load it with more than half its rated power. | why 1/2 rated power? you tell her that the current remains the same automatically means half power. |
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