Table of Contents
Advertisement
136 Cooling and heating
Specifications
Temperature limits
Ambient temperature: See chapter
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 (φ) and the ambient
temperature (T
). To avoid all kind of condensation inside the converter: ABB highly
air
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).
T
air
(°C)
φ = 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.
Example:
At an air temperature of 45 °C (113 °F) and relative humidity of 65% the coolant
temperature 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.
Pressure limits
Base pressure: 100...150 kPa (recommended); 200 kPa (maximum). Base pressure
denotes the pressure of the system compared with the atmospheric pressure when the
cooling circuit is filled with coolant.
Maximum design pressure: 500 kPa
Recommended design maximum pressure: 380 kPa. Note: Contact ABB if you need to
rise the pressure over this limit. The pressure difference must be within given limits to
avoid malfunction due to excessive coolant flow.
Technical data
φ = 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
Converter output current derating
2.5% per 1 °C (1.8 °F) temperature increase
on page 107.
Min. T
(°C)
coolant
φ = 65%
φ = 50%
-0.9
3.7
8.4
13.2
17.9
22.7
27.4
32.2
36.8
41.6
46.3
φ = 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
Advertisement
Table of Contents
