ABB ACS880-34, Hardware Manual

Page: 186 / 256

186 Technical data

Altitude derating
At altitudes from 1000 to 4000 m (3300 to 13123 ft) above sea level, the derating is 1% for
every 100 m (328 ft). If ambient temperature is below +40 °C (+104 .°F), the derating can
be reduced by 1.5% for every 1 °C reduction in temperature. For a more accurate
derating, use the DriveSize PC tool. A few altitude derating curves are shown below.

Deratings for special settings in the drive control program
Enabling special settings in the drive control program can require output current derating.
Ex motor, sine filter, low noise
Table below gives the deratings in these cases:
•
drive is used with an ABB motor for explosive atmospheres (Ex) and EX motor in
Parameter 95.15 Special HW settings is enabled
•
sine filter given in the selection table on page 240 is used and ABB sine filter in
Parameter 95.15 Special HW settings is enabled
•
Low noise optimization is selected in Parameter 97.09 Switching freq mode .
Derating factor 1.00
Derating factor 0.95
Derating factor 0.9
Derating factor 0.85
Derating factor 0.80
1500 m
1000 m
+25 °C +30 °C
+77 °F +86 °F
Ambient temperature
+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