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LCX9000 Liquid-Cooled Drives User Manual
MN04005001E
For more information visit: www.EatonElectrical.com 2-13
January 2007
Condensation
Condensation on the cooling plate of the liquid-cooled drive must be avoided. Therefore, the
temperature of the cooling liquid must be kept higher than the temperature of the electrical
room. Use Figure 2-12 to determine if the drive operating conditions (combination of room
temperature, humidity and cooling liquid temperature) are safe, or, to find the acceptable
temperature for the cooling liquid.
The conditions are safe when the point is below the respective curve. If not, take adequate
precautions by decreasing the room temperature and/or the relative humidity or increase the
cooling liquid temperature. Note that increasing the temperature of the cooling liquid above
figures in loadability charts decreases the nominal output current of the drive. The below
curves are valid at sea level — 14.7 psi (1013 mbar).
Figure 2-12: Safe Operating Conditions in Relation to Condensation
113˚F (45˚C)
104˚F (40˚C)
100˚F (38˚C) 68˚F (20˚C)
95˚F ()35˚C
86˚F (30˚C)
77˚F (25˚C)
100 95 90 85 80 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 0
0
50 (10)
68 (20)
86 (30)
104 (40)
122 (50)
140 (60)
Ambient Temperature
Electrical Room Relative Humidity
Condensation – Safe Operating Area
Coolant
Temperature