Switching Frequency Derating By Derating Factor - ABB ACS580 Series Hardware Manual

4000 m
13123 ft
3500 m
11429 ft
3000 m
9842 ft
2500 m
8202 ft
2000 m
6562 ft
1500 m
4921 ft
1000 m
3300 ft
+20 °C
+68 °F
Note: Check the supply network compatibility restrictions above 2000 m (6562
ft), see Installation site altitude (page
output terminals above 2000 m (6562 ft), see sections
for frames R1...R5 and

Switching frequency derating by derating factor

The output current is calculated by multiplying the current given in the rating table
by the derating factor given in the table below.
Note: If you change the minimum switching frequency with parameter 97.02, derate
according to the table below. Changing parameter 97.01 does not require derating.
+25 °C
+77 °F
Derating factor 1.00
Derating factor 0.95
Derating factor 0.90
Derating factor 0.85
Derating factor 0.80
Isolation areas (page 234)
0.85
0.90
0.95
1.00
+30 °C
+86 °F
350). Check also PELV limitation on relay
Isolation areas (page 230)
for frames R6...R9.
Technical data 283
0.80
+35 °C +40 °C
+95 °F +104 °F