s
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 (
) 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
(
). 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
