in star delta starter current is 1/3times the delta value
how?
Answer Posted / parag bijlani
In star-delta starter, motor starts in star, and after a
time delay ,it switches to delta connections. The star
current is 1/1.732 (square root of 3).
| Is This Answer Correct ? | 9 Yes | 3 No |
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I have a drawing of a wound rotor induction motor for a crane. This crane motor has 5 forward speeds & 5 reverse speed implemented of course with different amount of resistance for each speed setting selected. What has got me scratching around is the fact that 8 of the 10 speed selections switch in uneven (unbalanced) amounts of resistances on each of the 3 connections to the motor's rotor.Can this be possible? I would have assumed this would produce unbalanced rotor currents and therefore vibration in the motor. I would greatly appreciate anyone's comments on this. Many thanks, Confused.
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