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This is a 3-phase UPS. The Voltages for the three phases are 243V, 251V & 245V but the input inside is showing 299V.
It gives a beep and gives a message : "voltage out of range".
Please help

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  • mtac Nov 13, 2007

    Thanks. We actually foungd that the circuit breaker in the DB of the building was a 1ph CB; so we changed this and reset the memory of the UPS. So it worked.

  • pzooft Dec 08, 2007

    My BlackoutBuster won't stop beeping every ~10 seconds. I tried unplugging everything and turning it off, but it beeps again when I plug it back up. It never did this before, but the power went off today and now I can't stop the beep. Please tell me how to stop the beeping.

  • Anonymous Mar 20, 2014

    Please help



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A 3 ph ups normally can work upto 450 volts because the normally its the transmisson range of voltage
220 to 250 is the voltage range of normal 1 ph line so check for proper line voltage or load voltage

Posted on Nov 13, 2007


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