Protection Of Heat Sink Against Condensation; Supply Of Temperature-Controlled Coolant - BONFIGLIOLI Active Cube Series Complement To Operating Instructions

6.4

Protection of heat sink against condensation

High atmospheric moisture at high exterior temperatures combined with a low coolant temperature can
result in condensation in the heat sink and the frequency inverter electronic system.
CAUTION
Condensation
Condensation can result in short-circuits in the frequency inverter and destruction of the
frequency inverter, refer to Operating Instructions of device.
 Ensure that condensation is avoided by taking the precautions described below.

6.4.1 Supply of temperature-controlled coolant

The table shows the minimum coolant inlet temperature as a function of the ambient temperature and
relative humidity. The hatched areas at the bottom right represent the non-permissible range.
0
5
10
15
20
25
30
35
40
45
50
55
If relative humidity cannot be measured, the inlet temperature must at least be the same as the ambient
temperature. The coolant inlet temperature must not exceed 45°C.
11/17
Relative humidity in %
10 20 30 40 50
-28 -20 -16 -12 -9
-24 -16 -11 -7 -5
-20 -12 -7 -3
-16 -8 -2 2
-13 -4 2 6
-9 0 6 10 14
-5 5 11 15 18
-1 9 15 19 23
3 13 19 24 28
6 17 23 28 32
10 21 28 33 37
14 25 32 37 41
Liquid Cooling ACU/ANG/AEC
60 70 80 90
-7 -5 -3 -1
-2 0 2 3
0 3 5 7 8
5 7 10 12 13
9 12 14 16 18
17 19 21 23
21 24 26 28
26 29 31 33
31 33 36 38
35 38 41 43
40 43
45
95 100
-1 0
4 5
9 10
14 15
19 20
24 25
29 30
34 35
39 40
44 45
27