Slip 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.
MKS slip resistors build upon the AEG system and are made of normalised cast
steel resistors. They are equipped with a slip of 5, 7 or 10% as standard.