A 3-ϕ, 400 V,50 A, 1440 RPM IM takes short circuit current as 6 times the full load current at 0.4pf lag at rated voltage & develops a torque of 1.8 times the full load torque. If the IM is starting with the help of an autotransformer of 60% tapping at the time of starting. which of the following is/are true?
1
Motor current is 180 A
2
Line current is 108 A
3
input power to the motor is 29.923 kW
4
Full load slip is 0.04