Answer / ssnslm

by conducting open circuit test by exciting LV winding with
rated voltage keeping HV winding open and Short circuit
test by shorting LV winding and exciting the HV winding
with reduced voltage, so that the tr. will draw a rated
current. we get no load loss. then we can predetermine the
load loss for any load or load loss is determined by
conducting back-to-back test on two identical trs.

Answer / ggr

The answer given by above person is some what ok, but not the reasonable answer. The question clearly mentioned the details that what they want. They need the formulae.

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