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Using 11000V/433V,3 ph,50Hz,500 KVA, what is the maximum
capacity of motor in KW that can be connected and started at
a single moment? Also explain about any calculations and
formulas used in deriving the same.
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Answer Posted / vijay krishna rao
considering DOL type of starter (so starting time will be
appx 6 times the rated current)and also considering starting
time of motor may affect the Xmer, then 500/6=83.33 MVA.
Motor rating (pf=0.8)=83.33*0.8=66.66kW (efficiency=100%)
If soft starter is used then motor rating can go upto Xmer
rating.
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