MVA Method for 3-Winding Transformer

6 Responses

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1. thomas says

   Hi Ver,

   thanks for your tutorial. Great!

   Thomas

   April 25, 2011, 4:27 PM
2. shozy says

   Hello Ver

   I have question regarding the lumped motor x” and generator Z% , where did you get this figure (=17% and 25% ) and for the generator which is X” = 0.113
   Can you please provide me these industry standards for motor & generator, so that my concept become more clear.

   Regrds

   July 22, 2011, 10:12 PM
3. Ver says

   Hi shozy,
   The values 17% and 25% for lump loads are industry acceptable values. Even ETAP use these values for their lump motor loads.

   July 24, 2011, 6:22 PM
4. David_Omar_Torres says

   Hello:

   Model for 4 winding transformer???
   As the impedances are represented, for calculation load flow in ETAP?
   Thaks
   David Torres G.

   August 15, 2011, 8:32 AM
5. saleem says

   How this MVA artical of SC covers the impedence of cables/bus duct.

   September 3, 2011, 6:08 PM
6. Ver says

   Please refer to this article. Cables and bus ducts need to be treated similarly but you need to know the impedance and the voltage rating.

   September 5, 2011, 4:33 AM