ABB ACS880-207LC, Hardware Manual

Page: 116 / 120

Min. T
coolant
(°C) T
air
(°C)
RH = 40% RH = 50% RH = 65% RH = 80% RH = 95%
-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. This has to be taken into
account when dimensioning the liquid cooling circuit.
Maximum pressure difference (between main in/out lines): 200 kPa
￭ Coolant flow rate limits
The maximum coolant flow rate for all drive equipment is 1.3 × nominal. See the technical
data chapter for nominal values.
￭ Cooling circuit materials
Materials used in the internal cooling circuit are listed below. These are also the only materials
that can be used in the external cooling circuit.
• stainless steel AISI 316L (UNS 31603)
• heavy gauge aluminum
• plastic materials such as PA, PEX and PTFE
Note: PVC hoses are not suitable for use with antifreeze.
116 Internal cooling circuit