INSTALLATION
vacon • 43
24-hour s358 (0)40 837 1150 • Email: [email protected]
5
5.2.1
Condensation
Condensation on the cooling plate of the NX Liquid-Cooled drive must be avoided. Therefore, the tempera-
ture of the cooling liquid must be kept higher than the temperature of the electrical room. Use the graph
below to determine if the drive operating conditions (combination of room temperature, humidity and cool-
ing liquid temperature) are safe, or, to choose the allowed 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 altitude (1013 mbar).
Figure 5-20. Safe operating conditions in relation to condensation
Condensation - Safe operating area
0
10
20
30
40
50
60
100
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
El. room relative humidity
A
m
b
ien
t t
e
m
p
er
at
u
re
Coolant temp ºC 20
Coolant temp ºC 25
Coolant temp ºC 30
Coolant temp ºC 35
Coolant temp ºC 38
Coolant temp ºC 40
Coolant temp ºC 45
