how we can select a transformer based on a particular load.
suppose we have 4 motors of rating 40 h.p , 50 h.p, 80 h.p
& 100 h.p. then what rating of transformer we can select.
urgent. pls reply
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Answer Posted / eng. ahmed esmail
total HP = 40 + 50+80+100=270HP
1HP=0.746KW
total Kw =201.42Kw
at 0.75 power factor
P= S *P.F
S=268.56 KVA
at 0.85 transformer loading
S=268.56/.85=315.95 KVA
so we will use 400 KVA transformer for this motor loads
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