ABB ACS580-04, Hardware Manual

Page: 180 / 298

The derating factor for 1500 m is 1 - 1/10 000 m · (1500 - 1000) m = 0.95. Because
the surrounding air temperature is less than 40 °C, the altitude derating can be
reduced from 0.95 to 1. Thus, no derating is necessary for 1500 m altitude.
3. Surrounding air temperature derating (page 180) :
No derating is necessary for 35 °C surrounding air temperature.
From the table in section IEC ratings (page 177) , drive type ACS580-04-820A-4 exceeds
the I
2
requirement of 750 A.
￭
Surrounding air temperature derating
In the temperature range +40 … 55 °C (+104 °F … 131 °F), the rated output current is
derated by 1% for every added 1 °C (1.8 °F) as follows. Calculate the output current by
multiplying the current given in the rating table by the derating factor.
T
1.00
0.90
+40 °C
+104 °F
+50 °C
+122 °F
k
+55 °C
+131 °F
0.80
-15 °C
+5°F
…
0.85
0.95
180 Technical data