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NOTICE
Damage to bearings or the shaft
Large output masses and their centers of gravity outside the shaft extensions can lead to
resonance in operation. This can result in damage to the bearings and shaft.
Ensure that the permissible loads for the forces on the shaft extension are adhered to in
accordance with the catalog data or configuration data.
● Use tensioning rails to set up belt-driven motors to adjust the belt to the correct tension.
5.4
Ensuring cooling by means of external fans
The machine is cooled by an external fan independently of its speed. The following conditions
apply:
● The cooling air must enter unimpeded through the air inlets and be discharged unimpeded
● Expelled air is not drawn back in immediately.
● The cooling air must be clean.
● The direction of the air flow in the motor is stated on the rating plate. Do not change the
● If ventilation openings are covered by louvered covers, the openings of the louvered covers
● If the ventilation openings are directed upward, protect the openings with sufficiently large
● On closed-circuit-cooled motors with a pipe connection or external fan, you must choose
● Where a pipe connection is used, comply with the specifications for cooling air flow rate
● In the case of motors with a built-on external fan or with an air-to-air or air-to-water heat
● Do not use materials containing silicone to seal the air inlet ducts and machine elements.
SIMOTICS DC 1GG5
Operating Instructions 02/2016
CAUTION
Excessive belt tension
On machines with a belt pulley, the bearings and shaft can be damaged if the belt tension
is too high.
It is essential, therefore, that the radial and axial shaft load values are within tolerance.
through the air outlets.
direction of ventilation without first asking for advice because it may make derating
necessary. In the case of motors with winding temperature monitoring, the temperature
monitor may cease to function if the air-flow direction is subsequently changed.
must be directed downward to maintain the degree of protection.
covers at an appropriate distance from the openings.
and connect suitable pipes, external fans, and air ducts. With the IC 37 cooling method,
replace the louvered covers on unused openings with closed covers.
and cooling air direction stated on the rating plate.
exchanger, the relevant operating instructions must be observed.
5.4 Ensuring cooling by means of external fans
Assembling
49
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