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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):
k
1.00
0.90
0.80
+40 °C
+104 °F
Altitude derating
At altitudes 0 ... 2000 m (6561.7 ft) - no derating. For derating at altitudes over 2000 m
(6561.7 ft), contact ABB.
T
+50 °C
+122 °F
Technical data 217
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