118 The internal cooling circuit
Maximum coolant inlet temperature for the converter
Maximum inlet temperature variation: ±4°C
Maximum temperature rise: 13°C; 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: 600 kPa (6 bar)
Nominal pressure difference: 130 kPa (1.3 bar) / 140 kPa (1.4 bar) (hydrostatic)
Maximum pressure difference: 170 kPa (1.7 bar) / 180 kPa (1.8 bar) (hydrostatic)
Working pressure: min. 120 kPa (1.2 bar)
Pressure monitoring: Pressure at the measuring point must stay within the range of
120 kPa...380 kPa (1.2…3.8 bar) for the converter to operate.
T
air
(°C)
Min. T
coolant
(°C)
φ = 95% φ = 80% φ = 65% φ = 50% φ = 40%
5
5.0 5.0 5.0 5.0 5.0
10 9.2 6.7 5.0 5.0 5.0
15 14.2 11.5 8.4
5.0 5.0
20 19.2 16.5 13.2 9.4 6.0
25 24.1 21.4 17.9 13.8 10.5
30 29.1 26.2 22.7 18.4 15.0
35 34.1 31.1 27.4 23.0 19.4
40 39.0 35.9 32.2 27.6 23.8
45 44.0 40.8 36.8 32.1 28.2
50 49.0 45.6 41.6 36.7 32.8
00553829
= Not allowed as standard but the coolant temperature must be 5 °C or
above. Consult an ABB representative if operation below coolant
temperature 5 °C is required.
Example: At an air temperature of 45 °C and relative humidity of 65% the coolant
temperature may not be below +36.8 °C
Range Converter output current derating
5 °C (41 °F) minimum coolant inlet temperature
50 °C (122 °F) maximum coolant inlet temperature with derating
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