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If 3-Ph motor of same rating connected in Delta & Star for
same load one by one then which connection take more
current in running (not in starting)for full load.(eg 8.5
KW,3-Ph 400 V)
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Answer Posted / jai prakash narain singh
for same capacity of motor,incase it runs in star it will
draw more current reason being,phase voltage=line voltage
divided by root of 3.where as power remains same.
as you know,power =root of 3 xvolt x current xcosine angle
of volt and current, since power remains same and voltage
has reduced in this case current will increased. if this
motor is connected in delta,and suppose its full load
current is I amp,
and in star current will be root of 3 x I AMP.
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