ABB ACS580-01 - Altitude Derating

166 Technical data
 Altitude derating
In altitudes 1000…4000 m (3300…13120 ft) above sea level, the derating is 1% for
every 100 m (330 ft).
The output current is calculated by multiplying the current given in the rating table by
the derating factor k, which for x meters (1000 m <= x <= 4000 m) is:
Altitude and ambient temperature
If ambient temperature is below 40 °C (+104 °F), the derating can be reduced by
1.5% for every 1 °C (1.8 °F) reduction in temperature. A few altitude derating curves
are shown below. For a more accurate derating, use the DriveSize dimensioning PC
tool.
Derating factor 1.00
Derating factor 0.95
Derating factor 0.9
Derating factor 0.85
Derating factor 0.80
k = 1 -
1
10 000 m
.
(x - 1000) m
1500 m
1000 m
+25 °C +30 °C
+77 °F +86 °F
+40 °C
+104 °F
+35 °C
+95 °F
+20 °C
+68 °F
3300 ft
4921 ft
2000 m
6562 ft
2500 m
8202 ft
3000 m
9842 ft
3500 m
11429 ft
4000 m
13123 ft
Installation site altitude
1.00
0.95
0.85
0.90
0.80
Ambient temperature