85
OIL-COOLED DEVICES
5.2.4 Coolant temperature and condensation with oil
Theowtemperatureshouldbeselecteddependingonthevolumeowthattheheat
sink temperature is always 10 K below the overtemperature level (OH) at rated opera-
tion. This avoids a sporadic shutdown.
The maximum heat sink temperature can be found in chapter => „3.3.1 Switching fre-
quency and temperature“.
NOTICE
Destruction of the drive controller due to short circuit!
► The user must guarantee that any moisture condensation is avoid-
ed!
5.2.4.1 Avoid moisture condensation
Supply of temper oil
This is possible by using heatings in the cooling circuit for the control of the coolant tem-
perature. The following dew point table is available for this:
The following table shows the coolant inlet temperature as a function of ambient tem-
perature and air humidity.
Air humidity / %
Ambient
temperature / °C
10 20 30 40 50 60 70 80 90 100
-25 -45 -40 -36 -34 -32 -30 -29 -27 -26 -25
-20 -42 -36 -32 -29 -27 -25 -24 -22 -21 -20
-15 -37 -31 -27 -24 -22 -20 -18 -16 -15 -15
-10 -34 -26 -22 -19 -17 -15 -13 -11 -11 -10
-5 -29 -22 -18 -15 -13 -11 -8 -7 -6 -5
0 -26 -19 -14 -11 -8 -6 -4 -3 -2 0
5 -23 -15 -11 -7 -5 -2 0 2 3 5
10 -19 -11 -7 -3 0 1 4 6 8 9
15 -18 -7 -3 1 4 7 9 11 13 15
20 -12 -4 1 5 9 12 14 16 18 20
25 -8 0 5 10 13 16 19 21 23 25
30 -6 3 10 14 18 21 24 26 28 30
35 -2 8 14 18 22 25 28 31 33 35
40 1 11 18 22 27 31 33 36 38 40
45 4 15 22 27 32 36 38 41 43 45
50 8 19 28 32 36 40 43 45 48 50
Coolant inlet temperature / C°
Table 45: Dew point table
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