260 volt AC window unit ?

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260 not a common utilization voltage anywhere AFAIK. Possibly mis labeled?

Maybe designed to run on 240 or 277 nominal? If so 208 nominal maybe isn't really intended at all for this unit?
 
Only thing I ever heard of along those lines is 265V PTAC units for use on 277V circuits. The best course of action if it is 260V is buy one with a usable voltage & pay to have the oddball unit properly disposed of.
 
Stevenfyeager said:
My customer bought a 260 volt heat/AC window unit from Europe and says he cannot return it. How can I help him? Is there a transformer for this ? Thank you.
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You get transformers for any voltage. It may have to be custom made rather than off the shelf. An autotransformer may be the least cost option for this.
But you may still have a frequency problem. All of Europe is 50Hz. You have 60Hz on the other side of the pond.

And, as kwired has said, 260V is not a common voltage anywhere that I know of. Perhaps the unit was built to suit a particular facility i.e. non standard.
Another thing to think about is the frequency.

And it seems a little odd to me that your customer would buy from a European country rather than a local supplier. I think you should treat this with caution. Or even decline to get involved.
 
Here's a possible, albeit remote, possibility.

The window unit was designed for 220V 50Hz operation. Knowing it was going to a 60Hz environment and knowing that the motors were not designed for 220V 60Hz, they are telling you that in order to operate it with the correct V/Hz ratio that the motors are designed for, 4.4:1, you must give it at least 260V (60Hz x 4.4 = 264V, rounded down to 260).

It's far more likely though that someone is reading it at an angle or a nameplate is blurry, or it came from China where they just don't care about accuracy...
 
260V is within 10% limit of ANSI standard utilization voltages for 277V. As for 50 to 60 hz change, it is an increase and so it depends on load only whether there would be an excessive current draw or not. So hook it up and if there is no excessive current draw at full load, it is probably okay.
 
Sahib said:
260V is within 10% limit of ANSI standard utilization voltages for 277V.
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Well, yes. That's simple enough arithmetic. But it doesn't explain where the 260V came from nor why it was purchased from a European vendor for use in the USA.
Makes no sense.
 
Besoeker said:
But it doesn't explain where the 260V came from nor why it was purchased from a European vendor for use in the USA.
.
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It is OP's customer's call: how he purchased it ? Why he purchased it? Wherein Europe he purchased it?
 
my guess, thats a max rms 50Hz voltage rating, likely runs in the 180-260v(rms) range.
at least that is what i find on many euro appliance specs when looking online.

i'd say, use a 240v vfd for the 50Hz issue, see what happens.

eruoapp.jpg
 
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FionaZuppa said:
my guess, thats a max rms 50Hz voltage rating, likely runs in the 180-260v(rms) range.
at least that is what i find on many euro appliance specs when looking online.

i'd say, use a 240v vfd for the 50Hz issue, see what happens.
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It might work. Still won't give you 260V
And added cost of course.

Why import a non-standard unit with incompatible voltage and frequency? Makes no sense when you could source one locally.
Something doesn't add up. Maybe we haven't got the whole story.
 
Besoeker said:
It might work. Still won't give you 260V
And added cost of course.

Why import a non-standard unit with incompatible voltage and frequency? Makes no sense when you could source one locally.
Something doesn't add up. Maybe we haven't got the whole story.
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we can question why this item was brought into the US all day long, but he asked how to make it run.
 
Sahib said:
It is OP's customer's call: how he purchased it ? Why he purchased it? Wherein Europe he purchased it?
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Of course it would have been the OP's customer's call to import something that doesn't match local voltage or frequency.
Maybe he was moving back from Europe and thought he would bring it with him?
There are more questions than answers......in the words of that song.
 
OK, it looks as though there are some EU based mfrs of AC units that use an inverter technology, and carry an input voltage RANGE of 90-260V.
http://cooperandhunter.com/en/product-category/single-zone/icy-2-series/

Heat pump designed for heating operation in the climate of Northern Europe; Operate at power range 96-260V.
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That doesn't mean you MUST give it 260V, that means it will not DIE if it gets 260V during a surge. I also found that there are a number of power "Stabilizers" sold for use with A/C units in mind, all of which again, have a RANGE of up to 260V, with a stable output of 230V. So bottom line, this is likely someone not knowing what they are reading...
 
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