ABB ACS880-17 - Derating

Technical data 165
 Derating
Ambient 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):
For example:
Temperature Derated current
40 ºC (104 ºF) I
2
I
Ld
I
Hd
45 ºC (113 ºF) 0.95 · I
2
0.95 · I
Ld
0.95 · I
d
50 ºC (122 ºF) 0.90 · I
2
0.90 · I
Ld
0.90 · I
Hd
T
1.00
0.90
+40 °C
+104 °F
+50 °C
+122 °F
k
0.80