in induction motor the torque is propotional to squre of
supply voltage in case of dol the motor directly connected
to supply so torque is more while in star delta the motor
is firstly connected to star hence voltage is reduced
torque will be less and when motor reaches its 80% of speed
it connects with delta with the help of timer then full
voltage is supplied hence less rating motor should be
started with dol but for high rating it should be with star
Please Help Members By Posting Answers For Below Questions
hi can any body send me syllabus of rrb electrical section
and past pepar also of any board...
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ranging from 5 kw to 1000kw?
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objective ,that time i solved that qes. but if i tried
solve objective form the other book then i could not solved
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