Additional internal cooling

Designed for efficiency class IE3 the range departs from the former principle of cooling purely by way of cooling ribs and implements an additional internal cooling system. In combination with a new die-cast rotor, which promotes better thermal behaviour, as the basis for higher efficiency and an extremely compact design.

The optimised winding design permits use in variable speed drive systems. A special mica-based winding system is available for inverter-fed operation with inverter output voltages up to 690V.