A 3-phase delta-connected squirrel cage induction motor when started with a DOL starter has a starting torque of 600 NM. Its starting torque when star-delta starter is used:
A 3-phase delta-connected squirrel cage induction motor when started with a DOL starter has a starting torque of 600 NM. Its starting torque when star-delta starter is used:
Right Answer is:
200 NM
SOLUTION
Starting torque of the star delta starter is equal to 1/3 of its delta value
Hence starting torque = 600/3 = 200 NM