21 - PVD 3661 MGV_ commisionning manual_March 2012.docx
3.6. Cooling
In compliance with the IEC 60034-1 standards:
3.6.1.
General recommendations
Danger:
The cooling system has to be operational when the motor is running or
energized.
Danger:
The Inlet temperature and the water flow have to be monitored to avoid any
damage.
Caution:
When motor is not running, the cooling system has to be stopped 10
minutes after the motor shut down.
Caution:
To avoid any issue, we recommend: T
water
> T
air
- 2°C.
Condensation and risk of rust may occur when the temperature gradient
between the air and the water becomes significant. Condensation is also linked to
hygrometry rate.
The motor can be used with an ambient temperature between 27°C to 40°C with a
high water temperature but with derating.
If inlet water temperature becomes higher than 25°C, derating factor must be applied
according to §3.1.2 Temperature Derating
Caution:
the ambient air temperature shall not exceed 40°C in the vicinity of the
motor flange.
Danger: If the water flow stops, the motor can be damaged or destroyed causing
accidents.
