For the durability we consider the graphs available in the catalogue can be used also for usage of IE3 motors. When stating the life length of an AC-3 application, it is the breaking of the rated motor current that will have the major influence on the contactor. Since the rated current is lower using an IE3 motor, the life cycle durability will remain close to the same as before.
If you have a need to design a starter for handling an AC-4 application, inching, then we recommend you check the motor parameters.
If the motor data for locked rotor current isn’t more than 7,5 times rated current, then you can work directly with the tables in the catalogue. How ever when you have locked rotor currents higher than this, then please contact ABB for further guidance. Having the motor data in hand we will help you match a suitable contactor. This is recommended to find an optimized solution for each case as there can be significant differences between motors available in the market.