ABB ACS880-604LC, Hardware Manual

Page: 71 / 104

The higher the concentration of heat transfer fluid, the higher the viscosity of the coolant.
This results in a higher pressure loss in the system. See
Pressure limits (page 71) .
The nominal current ratings of drive system modules apply to an Antifrogen® L / water
solution of 25/75% (volume). For derating with other ratios, contact your local ABB
representative.
Incoming coolant temperature:
0…50 °C (32…122 °F): no current derating required
Condensation is not allowed. The minimum coolant temperature to avoid condensation (at
an atmospheric pressure of 1 bar) is shown below as a function of relative humidity (RH)
and ambient temperature (
T
air
).
Min. T
coolant
(°C) T
air
(°C)
RH = 40% RH = 50% RH = 65% RH = 80% RH = 95%
-7.4 -4.5 -0.9 1.9 4.3 5
-3.0 -0.1 3.7 6.7 9.2 10
1.5 4.6 8.4 11.5 14.2 15
6.0 9.4 13.2 16.5 19.2 20
10.5 13.8 17.9 21.4 24.1 25
15.0 18.4 22.7 26.2 29.1 30
19.4 23.0 27.4 31.1 34.1 35
23.8 27.6 32.2 35.9 39.0 40
28.2 32.1 36.8 40.8 44.0 45
32.8 36.7 41.6 45.6 49.0 50
37.1 42.2 46.3 50.4 53.9 55
= Not allowed as standard but the coolant temperature must be 0 °C (32 °F) or above.
At an air temperature of 45 °C and relative humidity of 65% the coolant temperature may
not be below +36.8 °C
Example:
Maximum temperature rise: Depends on heat losses and mass flow. Typically 10 °C (18
°F) with nominal losses and 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.
Air counterpressure in the expansion tank: 40 kPa
Design pressure (PS): 600 kPa
Nominal pressure difference (between main in/out lines): 120 kPa with 25/75% (volume)
coolant solution, 150 kPa with 50/50% (volume) coolant solution
Maximum pressure difference (between main in/out lines): 200 kPa
Internal cooling circuit 71