Variac primary voltage rating 220 - can it be used on 110?

[Kristi27]

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!

[torbjorn]

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.

[Guest]

Thanks!

[Guest]