asynchronous machine's rotor speed is negative

There is a machine model 07 (200 HP 460V 60 Hz 1785 RPM), when i input 700N.m torque, speed goes negative value. 700 Nm is not over on nominal power, it mustnt reverse direction.

Answer 1

[Subrat Borgohain]

exchange two of the source voltages, and it will be solved.

Answer 2

[afnan sahuon]

firstly, let slip of IM equal 0 and run the model

after that modify the slip into 1.

the rotor speed will be exactly, starts from zero and positive value.