Derating; Temperature Derating; Altitude Derating - ABB ACS880-207 Hardware Manual

Derating

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Temperature derating

In the temperature range +40...50 °C (+104...122 °F), the rated output current is derated
by 1% for every added 1 °C (1.8 °F). The output current can be calculated by multiplying
the current given in the rating table by the derating factor (k):

Altitude derating

At altitudes from 1000 to 4000 m (3300 to 13123 ft) above sea level, the continuous output
currents given above must be derated 1% for every 100 m (328 ft). For a more accurate
derating, use the DriveSize PC tool.
k
1.00
0.90
0.80
+40 °C
+104 °F
Technical data 111
+50 °C T
+122 °F