Answer / naveenkumar

efficency=output/input*100
eg: your transfer full load current is 100A your consuming the 70A then
(70/100)*100=1/2*100=.7*100=70%.efficency.
life time of a transformer best 60% if u get 70% efficency t/f life time will reduce.if you going to 100 t/f is blusting

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