[rescue] 110VAC --> 208 or 220VAC transformers?
Janet L. Campbell
janet at foonly.com
Sat Dec 20 18:08:01 CST 2003
On Wed, 19 Nov 2003, Patrick Giagnocavo +1.717.201.3366 wrote:
> A converter transformer that will take 18A of 110VAC and convert to
> 220 with 9A is availble for about $200 from what I am told. Plus the
> cost of wiring into the panel I have.
> Does anyone have experience with these sort of things? Any gotchas I
> should watch out for? I assume that the transformer will for the most
> part give me the same quality of 220 as I have of 110 now (i.e. no
> weird harmonics or crap like that).
A 120/240 transformer rated at 2KVA or so will cost a lot less than $200.
HSC in Rohnert Park, CA was clearing 2.5KVA units out for $20 the last
time I was there. Check out electronics surplus shops and you should be
able to find something that will work on a budget.
Sinewave A/C is the ideal waveform for a transformer, that's why it's used
in the first place. It's probably not too critical, though, most
switching power supplies will work with marginal waveforms.
Make sure you're really using a 20A circuit, and check your load with an
ammeter once you bring everything up to make sure you're ok. Don't forget
to ground everything properly.
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