Large Transformer Inrush
Large Transformer Inrush
(OP)
IS there a way to calculate the inrush current manually? I have had this 34.5kV delta:12.47kV wye transformer tested and obtained the following test data:
winding resistance between taps
turns ratio test
dar/polorization index
Would an open circuit test give me the required values?
I am buying the EMTP software, so what should I have my EC test?
The manufacturer is not helping at this time and I cannot energize my line until I can prove to the utility I want trip there recloser.
winding resistance between taps
turns ratio test
dar/polorization index
Would an open circuit test give me the required values?
I am buying the EMTP software, so what should I have my EC test?
The manufacturer is not helping at this time and I cannot energize my line until I can prove to the utility I want trip there recloser.






RE: Large Transformer Inrush
Load losses (watts) at 85 are 22124
Target impedance 5.55%+-6.3%
Efficiency at 50% load is 99.417
RE: Large Transformer Inrush
Attached an article in Spanish on the subject.
I believe it to be able to read through Google Translate.
RE: Large Transformer Inrush
G. Bertagnolli, "Short circuit duty of power transformers" ABB. or in: http://iee
I report the formula in the attached jpg.
Si duri puer ingeni videtur,
preconem facias vel architectum.
RE: Large Transformer Inrush