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I have two Zeus model 1200VA. The input is 220Vac 50Hz and the output is 220Vac 50Hz. The fuse is 6A/250Vac. It has a UK three pronged plug and the two outputs on the back are universal and can fit american made electronics. Everything I plug in makes a weird sound and pops then smokes and will not work again. What is happening? Oh and I use a UK to US adapter to plug in the UPS'

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  • Richard Vieira Sep 09, 2010

    And they are Uninterruptable power supplies.

  • Richard Vieira Sep 10, 2010

    I have figured it out. The UPS itself has a switch built in that allows me to turn the voltage down to 120. Turns out actually reading the manual works, Haha.

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Hello,

You state that you are using a UK / US adapter to plug in the UPS. Since the UPS is expecting 220vac, as nameplate states, it will also deliver 220vac on the output from battery power. The UPS may also have a universal power supply on the input so that batteries can charge at a lower voltage, and also allow the UPS to augment "dirty power" by using the batteries for extended service, rather than use the batteries alone.

From your description, the UPS is still making 220vac @ 50Hz, but the use of an adapter leads me to think that you are using devices that are intended for perhaps 120vac @ 60Hz. Wrong Voltage, Wrong Frequency.

Posted on Sep 10, 2010

  • Sheldon Dedek Sep 10, 2010

    Even though you are able to change the voltage to 120vac, you might still be looking at a frequency problem unless the switch changes that as well.

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