Answer Posted / vinodth
consider 1 transformer having the power 125mw,33kv...
1)p=125mw,
v=33kv,
cosQ=0.8
p=1.732VlIlcosQ
I=125000/1.732*33000*0.8
I=2733.7
2)cosQ=0.7
I=125000/1.732*33000*0.7
I=3124.29
loss=i*ir..if the pf reduces,then loss get increases...v
cant maintain the pf as unity,tats y the pf s maintained as 0.8
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