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Step up Transformer 2000w 110v-220v

gerald__

New Member
My question is can a 2000w step up voltage converter ( 110-220) be rewired so as I can use it as a step down 220 to 110v? I have a 120v 780w polisher that i want to use. Unfortunately bought yhe wrong converter and cannot return...PLEASE HELP
 
Welcome to ETO.
Can you post a link to the converter?
 
Screenshot_20240222_100643.jpg
 
As the voltage converter is just a hunky toroidal transformer it should be ok to work it in reverse. However, the mains switch, if rated for 110V input, would have to be changed for a 220V rated one. Likewise input/output connectors, display and any fuse would need to be suitably rated for the new use.
 
Thank you so much bro, its starting to feel I have not completely waisted money...it will arrive only on Tuesday, so I will have to see now where I can find a good technician to do the conversion for me...again thx for the assistance.
 
It sounds like an autotransformer.

Photos please, showing all the input & output connections?

In essence, it should need the live & neutral from the original input swapping to the output, and vice-versa.
 
Thx for your help....
 

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I agree with Ron; black looks to be neutral, connecting directly between input and output.

If so, the brown and red transformer wires are the two voltages. Exchanging them should make it 220-240 IN, to 110-120 OUT.

I would re-label the IEC power input socket to 220-240 (or just 230V) input rather than 110 as well.
 
I suggest that you leave the voltmeter and its switch connected to the same wires of the transformer as they are at the moment. That will show if it is working.

The labelling of the switch will be the wrong way round but that's all.

Connect up with using a fuse of 15 A or so. If you have the wrong connection that will blow.
 

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