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Product documentation 1D 3.8.en Rev. E, 10/13 page 12/42
2.1.2 Cooling method, ventilation
Ventilation method is based on operating conditions and client’s demands. Machine cooling proceeds by
two methods: in the first one open ventilation system (
Fig. 3) sucks ambient air to cool the winding, warmed
air is exhausted by fan to the atmosphere on AS side. The other cooling method makes use of internal cooler
(
Fig. 2). It is a closed circuit air-circulation system, in which air is cooled in a water or air cooler and returned
back to the main machine. This system is applied if a higher degree of protection is required.
Fig. 2 Closed circuit
Fig. 3 Open circuit
1 Rotor
2 Stator
3 Fan
4 Cooler
5 Housing top
1 Rotor
2 Stator
3 Fan
4 Housing top
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