How to calculate the reactance of a transformer formula?
Answers
HERE IS AN EXAMPLE
How can I calculate transformer resistance and reactance having X/R, %Z, MVA, and kV from primary and secondary voltages?
i need in ohms X and R
I have
X/R=45
MVA=250
kV prim=230
kV sec=34.5
%Z=12.5
ans: First Of All You Have To Find The Base Impedance That Is ((kV)^(2))/(MVA) After Finding That Multiply Your Per Unit/ Percentage Impedance With Base Impedance Through This Actual Impedance Of Transformer Is Found. Now Through X/R Ratio You Can Find The Resistance And Reactance Of Transformer In Your Case Adjust The Equation Like This :
X = 45*R
X = ((Z)^(2)-(R)^(2))^(1/2)
Compare Both
((Z)^(2)-(R)^(2))^(1/2) = 45*R
Through This You Will Get The Resistance Of Transformer And Put This Resistance Value In X/R Ratio You Will Get The Reactance Of Transformer
I Hope It Will Help You