220v-110v Step-Down Transformer Question


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Old 04-17-15, 12:39 AM
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220v-110v Step-Down Transformer Question

Hi. I have a fabric steamer bought from the US that is rated at 1100 watts. It's not dual voltage though, and I want to use it oversees where the electricity is 220 volts.

My question is, how many amps should the transformer be? My high-school Physics tells me if it's 1100 watts at 110 volts, then at 220 volts, it should need 5 amps? Is that correct? And if so, would be a 5 amps step-down transformer suffice?

Thanks!
 
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Old 04-17-15, 05:21 AM
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You want a 1200VA 2:1 transformer; but if the steamer is on for longer than several hours at a time, I'd suggest a 1500VA. Yes, your math is correct, but transformers are more properly sized by power and not by amps. An autotransformer will be smaller/cheaper than the same VA in a isolated winding configuration.
 
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Old 04-17-15, 06:30 AM
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Thank you for your reply.

The steamer will usually be on for a 10-15 minutes at a time. I don't think it'll ever be on for more than 30-45 minutes at a time max as it's a small one, meant for quick touch-ups for one or two shirts only.

I'm not very much familiar with VA (I know what it is, but not much more). And the transformers I've seen where I'm at were either rated by Watts or by amps. (A local electric shop told me I'd need a 5 amp transformer). I didn't see a VA rating on any
 
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Old 04-17-15, 07:57 AM
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Great. I'll try to find something like that here. So basically, I'm looking for a transformer that's above 1,100 watts, right?
 
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Old 04-17-15, 06:45 PM
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Yes, correct..............
 
 

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