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  • Conversion of UPS in Stabilizer.

    Md. Shamim

    Member

    Updated: Oct 26, 2024
    Views: 1.2K
    Dear All,
    I want to know that how it is possible to convert a 1000VA(say) UPS into a voltage stabilizer. As we also know that UPS O/P voltage is constant and about 220V AC whatever its I/P voltage is available for given rating. Now, If I feed 12V DC supply using rectifier circuit in place of battery then can I get output voltage of 220V.
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  • Ramani Aswath

    Member • Nov 12, 2015

    Good that you are thinking laterally.
    One can use an umbrella as a walking stick. No problem. Just a suboptimal solution.
    However, what is important is that one is aware that this can be done. May be crucial in an emergency.
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  • lal

    Member • Nov 12, 2015

    Yes, you can replace the battery with a rectifier. But, be warned, that's a lot of current your rectifier has to deal with. And an extra two stages of conversion.

    For 1000VA output, in an ideal case, the rectifier should be able to supply 1000VA/12V = 83.33A. In reality, considering losses, that value should be around 100A. That's actually very huge a rating for transformer, diodes and other filter elements of the rectifier circuit.

    Then the extra conversion stages and hence the losses. AC has to be first rectified to DC and then again to stabilised AC in this setup, which adds extra losses and a far less clean output waveform. The output waveforms of UPS supplies are mostly not the pure sine wave type, unless specified by the manufacturer.

    But anyway, the short answer is, yes, it is possible.
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