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Specifications
Temperature limits
￭
Ambient temperature: See the technical data.
Minimum coolant inlet temperature: Condensation or frost is not allowed. The minimum
coolant temperature to avoid condensation (at an atmospheric pressure of 1 bar / 100 kPa)
is shown below as a function of the relative humidity (RH) and the ambient temperature
(T
). If coolant inlet temperature cannot be higher, the temperature values in the table
air
below are absolute minimums.
To avoid all kind of condensation inside the converter: ABB highly recommends to maintain
/ heat up the cooling liquid +10 °C (+50 °F) above the ambient temperature (ie, air
temperature outside the converter), within the limits that the cooling liquid minimum
temperature is +5 °C (41 °F) and maximum temperature is +50 °C (122 °F). The table below
shows the minimum coolant inlet temperatures.
T
air
(°C)
RH = 95%
5
10
15
20
25
30
35
40
45
50
55
Not allowed as standard but the coolant temperature must be 5 °C (41 °F) or above. Consult
an ABB representative if operation below coolant temperature 5 °C (41 °F) is required.
At an air temperature of 45 °C (113 °F) and relative humidity of 65% the coolant temperature
Example:
may not be below +36.8 °C (98.2 °F).
Maximum coolant inlet temperature: 50 °C (122 °F) without derating of the converter
output capacity. Range above 50 °C (122 °F) is allowed as follows:
Range
50...55 °C (122...131 °F)
Maximum temperature rise: 13 °C (55.4 °F); depends on mass flow.
RH = 80%
4.3
1.9
9.2
6.7
14.2
11.5
19.2
16.5
24.1
21.4
29.1
26.2
34.1
31.1
39.0
35.9
44.0
40.8
49.0
45.6
53.9
50.4
Min. T
(°C)
coolant
RH = 65%
RH = 50%
-0.9
3.7
8.4
13.2
17.9
22.7
27.4
32.2
36.8
41.6
46.3
Converter output current derating
2.5% per 1 °C (1.8 °F) temperature increase
Cooling and heating 121
RH = 40%
-4.5
-7.4
-0.1
-3.0
4.6
1.5
9.4
6.0
13.8
10.5
18.4
15.0
23.0
19.4
27.6
23.8
32.1
28.2
36.7
32.8
42.2
37.1
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