Nov 11, 2005 #1 LaliGuras Electrical Nov 11, 2005 7 How do i calculate X and R for a power transformer like 10 or 20 MVA if i have only Z. Is there any standard X/R ratios for these transformers?
How do i calculate X and R for a power transformer like 10 or 20 MVA if i have only Z. Is there any standard X/R ratios for these transformers?
Nov 11, 2005 #2 wareagle Electrical Jul 28, 2003 391 Cutler Hammer list transformers 10 mva 69kv as 5.5% x/r = 10 above 69kv 7.5% x/r = 12 12 mva to 30 mva 10% x/r =20 Upvote 0 Downvote
Cutler Hammer list transformers 10 mva 69kv as 5.5% x/r = 10 above 69kv 7.5% x/r = 12 12 mva to 30 mva 10% x/r =20
Nov 11, 2005 #3 dpc Electrical Jan 7, 2002 8,718 The IEEE Red Book has a graph of average X/R ratio as a function of transformer type and rating. There is no way to directly calculate without the transformer test data. Upvote 0 Downvote
The IEEE Red Book has a graph of average X/R ratio as a function of transformer type and rating. There is no way to directly calculate without the transformer test data.
