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  1. prashious12

    inrush current of pdu transfomers and inst. setting of ups breaker

    @sahelrahman : Its very good point. About setting the internal CB instantaneous setting, I believe, you have to make sure that internal breaker also should not trip on inrush current though the UPS may transferred to Bypass because of inrush current as rightly mentioned by Sibeen. The internal...
  2. prashious12

    Transformer Reactive power requirement

    Thanks a lot for such detailed discussion on the point i have put in this forum. I can conclude from this, there is no IEEE or any other standard which states the typical range of KVAR requirement for particular rating of transformer given with typical % impedance. We can though calculate from...
  3. prashious12

    Transformer Reactive power requirement

    Thanks to both. one more que. given X/R ratio is to be considered for excitation branch with respect to Transformer model or with respect to thevenin's equivalent Transformer model referred to primary? Prashious
  4. prashious12

    Transformer Reactive power requirement

    @dpc: I understand it is different from Generator but is there any standard or guidelines mentioning the reactive power consumption for core excitation for transformer at loading equal to rated load with load power factor equal to 1. @steve: I have a preliminary data for transformer as...
  5. prashious12

    Transformer Reactive power requirement

    Hello Everyone, Is there any standard mentioning the reactive Power Requirement for different % loading for power Transformer?? Precisely, If power factor of load is unity and load is 100% of Transformer rating, How much (approximately or maximum) will be the reactive power consumption of...

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