The maximum torque of a 440 V, three phase four-pole 60 Hz induction motor is 400 Nm at a difference (slip) between synchronous and non-synchronous speeds of 0.1. If the supply frequency is changed to 50 Hz and the voltage is reduced to 400 V, what will be the maximum torque generated and difference between the synchronous synchronous and non-synchronous speed (slip), respectively?

The maximum torque of a 440 V, three phase four-pole 60 Hz induction m

1.	The maximum torque of a 440 V, three phase four-pole 60 Hz induction motor is 400 Nm at a difference (slip) between synchronous and non-synchronous speeds of 0.1. If the supply frequency is changed to 50 Hz and the voltage is reduced to 400 V, what will be the maximum torque generated and difference between the synchronous synchronous and non-synchronous speed (slip), respectively?
A.	475.6 N-m, 0.83
B.	436.6 N-m, 0.12
C.	475.6 N-m, 0.12
D.	436.6 N-m, 0.83
Answer» D. 436.6 N-m, 0.83