TAM 00695
27
DST2-135
– 400 W
10 / 2019
Three-phase synchronous motor, water-cooled
English
8.7 Min. coolant temperature against ambient temperature and humidity
25
% r
el. h
um
idi
ty
35
% r
el. h
um
idi
ty
45
% r
el
. h
um
idi
ty
55
% r
el
. h
um
idi
ty
65
% r
el
. h
um
idi
ty
75
% r
el
. h
um
idi
ty
85
% r
el
. h
um
idi
ty
10
15
20
25
30
35
40
0
5
10
15
20
25
30
35
40
ambient temperature (°C)
mi
n.
co
olant
tempe
rat
ure (
°C)
Figure 6: Determination of the coolant temperature
The allowed coolant temperature depends on relative humidity and ambient temperature. For
example with an ambient temperature of 25 °C and a relative humidity of 65 % the minimum
coolant temperature is 18 °C. Because these are limiting values on practical side a coolant
temperature greater than 18 °C should be used.
If this minimum coolant temperature will be under run the two- point controller of Baumüller drive
must be used to avoid condensation (see
figure 7
on next page).
Note:
For standstill of motor for longer time the cooling must be stopped.(to avoid condensation).
If ambient temperatures of < 3 °C may occur during a longer motor standstill, coolant should be
discharged as a precaution (to prevent frost damage).
