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Recent content by ANDY197

  1. ANDY197

    Typical Values on Losses & Impedances of Distribution Transformers

    Each transformer is going to have different losses, how ever you can specified total losses or just the load loss. If the manufacturer exceed the guarantee number then you can get some money back.( must be stated in the contract) When you specified the impedance leave your self a room for errors...
  2. ANDY197

    Transformer-Infrared shows much higher temperature than oil & winding

    Flow gauge on the pipe.
  3. ANDY197

    Transformer-Infrared shows much higher temperature than oil & winding

    Is this shell type transformer, forced oil? On the picture looks like only one pump is running.
  4. ANDY197

    Power Transformer Shipped Dry - Air or Nitrogen

    if the assembly crew is going inside the transformer to do internal connections or internal inspection, then the transformer is shipped with dry air.
  5. ANDY197

    Transformer-Infrared shows much higher temperature than oil & winding

    hot spot inside the transformer, loose connection, partial discharge,electrical arcing, there is lots of things to go bad. Pull the oil sample (dga) monitor combustible gases...
  6. ANDY197

    Doble Testing on Dry Type Transformers

    Doble power factor is not the test for the dry type transformer does not proof anything.
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