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Hydro X/R Ratio

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Humble2000

Electrical
Nov 17, 2005
132
SKM always assume X/R=8 no matter what you enter for hydro 3P MVA contribution. I have seen for 44KV X/R=8 and for 27.6KV X/R=12.I appreciate any feedback on this subject.

Thank you,
 
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As an assumption for X/R, I always preferred to use 15. You are correct, SKM uses 8; other packages don't provide an assumption. The actual value, determined from the sequence impedances, is always the best way to go.
 
Thanks Dandel,
Do you also use X/R=15 for L-G X/R ratio?
 
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