ABB ACH580-01 - Surrounding Air Temperature Derating, IP21 (UL Type 1)

Surrounding air temperature derating, IP21 (UL Type 1)
IP21 (UL Type 1) drive types, other than the exceptions below
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, in the diagram below).
T
1.00
0.90
+40 °C
+104 °F
+50 °C
+122 °F
k
0.80
-15 °C
+5°F
…
0.85
0.95
IP21 (UL Type 1) drive type -078A-4; -099A-6, -125A-6, -144A-6
-078A-4: In the temperature range +40…45 °C (+104…113 °F), the rated output current
is derated by 1% for every added 1 °C (1.8 °F). In the temperature range +45…50 °C
(+113…122 °F), the rated output current is derated by 2% 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):
0.90
k
0.80
0.75
0.85
0.95
T
+40 °C
+104 °F
+50 °C
+122 °F
…
+45 °C
+113 °F
1.00
-15 °C
+5 °F
0.85
-099A-6, -125A-6, -144A-6: In the temperature range +40…45 °C (+104…113 °F), the
rated output current is not derated at all. In the temperature range +45…50 °C
(+113…122 °F), the rated output current is derated by 1% for every added 1 °C (1.8 °F).
242 Technical data