Answer Posted / sai seddy

In transformer, the current in line with voltage,so here
there is no cosine angle between the voltage and
current.but Practically some angle present in the voltage
and current.so the power factor should be more than 0.9.
KVA = 1500
P.F = 0.9
KW = 1500*09
=1350KW.
For Safe working allowable = 80% of rated of rated voltage.
Safest power = 1350*0.8
= 1080 KW

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