ABB ACH580-31 - Surrounding Air Temperature Derating

Nominal current of drive type -025A-4 exceeds the current requirement of 18.1 A.
Surrounding air temperature derating
DeratingTemperature range
All drives
except IP55 (UL Type 12) drive type -206A-4
No deratingup to +40 °C
up to +104 °F
Derate 1% for every 1 °C (1.8 °F): Calculate the output by multiplying
the current given in the rating table by the derating factor (k, in the
diagram below).
+40…+50 °C
+104…+122 °F
T
1.00
0.90
+40 °C
+104 °F
+50 °C
+122 °F
k
0.80
-15 °C
+5°F
…
0.85
0.95
Technical data 173