Slip/Buffer resistors are required when excessive loads are to be expected during operation, for example in a crusher drive. Slip resistors limit the torque in rotor circuits in slip ring motors when the motor is starting or is in operation. Torque limiting is normal during continuous operation. Should an overload occur, the slip resistor reduces the nominal speed and limits the motor torque. In normal operation the actual nominal speed remains constant.
Pioneer Slip resistors are made from SS 401. These are non corrosive and stable resistors. The slip/buffer resistors are available in various ratings from 1-5 minutes or it can be intermittent or continuous. The Slip resistors are available with a slip of 5, 7, 10 or 15% as standard. The degree of protection of enclosure is as per customer’s requirement.
Major applications are Crusher Drive, Cutter drive, Chopper drive,etc…OR where the flywheel effect on motor.
It’s used in series with rotor circuit. It can be continuous or can be bypass/inserted in circuit via contactor when required.