I'm trying to calculate Susceptance and conductance values for a three phase transformer using the field test report.
I have excitation current in % (i believe % based on name plate current rating). Voltage is 100% and no load losses in KW.
I'm trying to convert everything to per unit and then calcualte G and B in per unit.
example if I = 0.048% = 0.00048 pu.
V = 1 pu
P = 50k/90M = 0.00055 pu
theta = inv cos(p/v*i), value of P/v*i is more than 1 so i couldn't calculate theta.
I was going to calculate magenetising and core loss values of current using Icos(theta) and Isin(theta)
G = I-core loss/V
B =I- magnetising/V
Am i doinig something wrong here?
I have excitation current in % (i believe % based on name plate current rating). Voltage is 100% and no load losses in KW.
I'm trying to convert everything to per unit and then calcualte G and B in per unit.
example if I = 0.048% = 0.00048 pu.
V = 1 pu
P = 50k/90M = 0.00055 pu
theta = inv cos(p/v*i), value of P/v*i is more than 1 so i couldn't calculate theta.
I was going to calculate magenetising and core loss values of current using Icos(theta) and Isin(theta)
G = I-core loss/V
B =I- magnetising/V
Am i doinig something wrong here?
