Electronics > Beginners

Using a 120V Variac on 230V

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Swake:
Found an original 120V Variac in very good condition. It is a 60ties or 70ties model. Is there anything that would refrain me from using it on 230V?
The amperage rating should be halved to maintain same power rating of course, but anything else?

Andy Watson:
Because it will likely saturate the core and release the magic smoke.

perieanuo:
You can use it, but only once...


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Swake:
Duh... forgot about that one.
Thanks for the reminder. There is also something with the frequency if I recall correctly. And I didn't check but this is probably a 60Hz model while we're at 50Hz.

Subsidiary question: can core saturation be measured/detected (using DIY level equipment that is)?

Totalsolutions:
Watch Dave release the magic smoke!
A transformer rated at 120 v ac on 230 v ac.
https://youtu.be/8itTKH5tj3s

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