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Description
3.3 Design
3.3.5
Cooling
Natural cooling
The rated data only applies when the ambient temperature does not exceed 40 °C (104 °F)
as a result of the installation conditions.
To ensure sufficient cooling, a minimum clearance of 100 mm from adjacent components
must be observed on three sides.
Forced ventilation
This cooling method is implemented by means of a separate ventilation module equipped
with a ventilator that operates independently of the motor.
NOTICE
Steps must be taken to ensure that the motor is always operated in conjunction with the
separately-driven fan.
The motors must be arranged in such a way that the cooling air can flow in and out without
obstruction and that the minimum distance (s) between the inlet/outlet air openings and
adjacent components is maintained (see "Minimum distance" diagram below). Steps must be
taken to ensure that hot outlet air cannot be drawn back into the system.
The covers (Pos. 1 in "Minimum distance" diagram below), which were removed to allow the
motors to be secured, must be reattached before the system is commissioned. The arrow
must point upwards.
Figure 3-2
s
1
22
Minimum distance (s)
Minimum distance between inlet/outlet air openings and adjacent components
(min. distance for 1PH813□: 60 mm)
Cover for NDE mounting foot
Synchronous/induction motors 1PH813
Operating Instructions, 04/2009, 610.48000.22
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