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My UPS transformer burned. I want to buy a new transformer

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The question is why did the ups tx burn, normally if a tx burns their will other damage to the unit, unless you are talking about an external tx, perhaps for voltage conversion.
UPS system are very difficult to repair as their are so many interconnected sections and parts. If you take the tx out and take it to a good tx maker he should be able to wind another the same, of course it depends on how damaged the original is. Even if you get a new tx it may not be the fix for the problem.

Hope this helps
Thanks for using FixYa

Posted on Aug 21, 2010

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ARE UPS WITHOUT ISOLATION TRANSFORMERS POPULAR FOR INDUSTRIAL LOADS LIKE AC MOTORS,DC DRIVES,CNC MACHINE TOOLS ETC.


Very few UPS have TX isolated outputs these days, way too expensive and heavy, in answer to the question.Buy the right technology for the load, if you try to connect any TX similar in size to the UPS it will shut it down in an instant as the UPS sees the TX startup surge as a short. (same with motors) There are ways of making it work, depending on the application.

Anything with fast high surge starting may shut down the UPS unless the UPS is much bigger than the load.

UPS used to be a real engineering tool, now days they can be bought in supermarkets, its nowhere truer, you get what you pay for.
I have been in the UPS hire and sales business for nearly 30 yrs, we do not buy cheap ones ever.

Hope this helps
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Aug 02, 2010 | APC Smart-UPS 1000VA UPS System

3 Answers

Does not power on


Please check whether you are getting any power on the UPS or not. In case it is not working even on the AC power, then it might be the transformer inside the UPS which has burned. It can be easily repaired by taking it to any APC service center. This does not seem to be an issue with the battery since the UPS is not even turning on

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My ups does not turn on after opening.


If it is the AC side of the transformer is "Shorted" then, yes you will have to replace the Transformer. You could re-wind it, All it is is a number of windings, about 3 -5 turns per Volt, so for a 120 V, it would be between, say, 400 - 600 Turns, wound onto the existing core, the Old wire can be easily removed. Turns Counted, or just measure the wire at the end, so as long as it all is the same Length, and Diameter, of Enameled Copper Wire, it could be wound back on, Insulate, with Insulation Tape.the "Bobin" before and after, and you have a NEW Transformer. The windings must be wound side by side, all up against each other the same as it is when you take it off. . Some Transformers are hard to "Crack" just use a grinder or similar to get into them, and sometimes the "Core" can be disassembled, sometimes the have E & I Laminations, that all slot together to make the core. It will all make more sense when you are actually doing it. Nothing is critical, except maybe the Insulation, do that well. Solder the ends of the wires to the tags and you be good to go. OR Just buy a nea one ..

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Could be the devices, the inverter, the up converter,or the micro.

Throw it away and buy a new one, as this will be cheaper and easier.

UPS devices are very complicated with lots of related circuits logic etc.

These units are not made to last, recover the batteries or recyle the whole thing.

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You have a brand new set of batteries with a bad UPS. Sorry to tell you that. You might have waited too long to replace your battery. What I mean, if you battery can not fully charge up, the inverter will try and keep charging it until it burns out. Then you buy a battery and you are now stuck with it.

You need a new UPS, may I suggest you get a bigger one....I have a 800VA with your name in it for only $80.00 plus shipping.

That is cheaper then what you are going to find. Keep it in mind also that APC is no a realy quality product either. Great marketing but poor support. Trust me that BE 500 is disposable.

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The more details you add, the better answer you'll get. For burned out transformers buy a new one with same power rating.

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