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UPS Rectifier DC Output Voltage | General Questions & Suggestions

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UPS Rectifier DC Output Voltage

Discussion in General Questions & Suggestions started by Geofrey , 8/20/2019 12:52 PM
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UPS Rectifier DC Output Voltage

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  • Geofrey

    Hello all,

    Someone can help, I am connecting a new UPS Galaxy 5500 for the 1st time (This unit for the first time I mean), and during the commissioning paces I happened to measure the Rectifier output on the DC bus..gives 260VDC on open circuit (Battery Breaker OFF. The Battery bank is a 36 unit bank with12V batteries, nominal voltage 432VDC. I hesitated to connect the battery breaker QF1 on with such a disparity in voltage; is this normal?

    Will the rectifier ramp up to the battery voltage? If not, will the battery higher voltage not damage the UPS/Rectifier?

    Any ideas welcome and appreciated.


  • Geofrey
    On 8/20/2019 8:52 AM, Geofrey said:

    UPS Galaxy 5500

    Its me again, just to add that the Unit is a 60kW capacity.

    First time posting here and forgive if the topic or rules are not quiet perfectly followed by me yet


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