Slip ring induction motor is old series of slip ring motor, JR slip ring induction motor must be connected to the starting varistor in the rotor circuit before starting. It is not allowed to short-circuit the rotor winding directly.
This series of motors is specially designed according to users' needs for large-capacity three-phase winding asynchronous motors, It can provide a larger starting torque at a smaller starting current, and can add an additional resistor in the rotor circuit to change the speed.