3.3.3.1 Machines with a fan
Self-ventilation (standard): Cooling method IC 411 according to EN/IEC60034-6
Located at the ND end of the stator housing is an air intake cowl that guides the external air on
its way to the motor. The external air is drawn in through openings in the air intake cowl and
ows axially across the outer cooling ribs of the motor frame. The fan wheel for the external
ow of cooling air is attached to the machine shaft.
The fan wheels are bidirectional.
Check the cooling eect below rated speed in the case of frequent switching or braking – or if
the speed is controlled continually below the rated speed.
Forced ventilation (optional): Type of cooling IC 416 in accordance with EN/IEC60034-6
Cooling that does not depend on the speed is achieved by means of a unit that is independent
of the motor operating state (forced ventilation). This unit is closed to the outside by a fan cover.
It has its own main drive with fan impeller which creates the cooling air ow required for cooling
the motor.
3.3.3.2 Machines without a fan (optional)
Surface cooling by free convection: Cooling method IC 410 according to EN/IEC60034-6
Figure3-1 IC410
Description
3.3Installation
1LE5, 1PC4 shaft heights 280 ... 355
28 Operating Instructions, 11/2022, A5E41454666A
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