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what is the difference betweem star connected motor & delta
connected motor?
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Answer Posted / a. v. ramana reddy
A star connected motor takes less current compared to a
delta connected motor since the phase current is 1/sqrt3
times the line current, but torque developed by the motor is
affected, since starting current is heavy in order to reduce
the heavy inrush current we place a star delta
starter.....so tat starting current can be comparitively
small...the reason for shifting to delta connection(after
motor attains 80% of the rated speed)is the power output of
the motor wil be 3 times the output wen it is connected in
star.....it doesn;t mean tat the m/c 3 times more efficient
than star connected one..but correspondingly the power drawn
by the motor also increases.........
comments r welcome....
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