engineering recuitment BARC Stipendiary Trainee Category I 2023 Mock Test Electrical Machines Three Phase Induction Motor Induction Motor Starting
A three-phase squirrel cage IM has a starting current of 10 times the full load current and full load slip of 5%
If an autotransformer is used for reduced voltage starting to provide 2.5 per unit starting torque, then the autotransformer tapping should be
1
50 %
2
70.71 %
3
100 %
4
78.6 %