Derating; Ambient Temperature Derating; Supply Voltage Derating; Altitude Derating - ABB ACSM1 Hardware Manual
Acsm1-04 drive modules
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- Manual (510 pages) ,
- Firmware manual (448 pages) ,
- Hardware manual (102 pages)
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72
Derating
The continuous output currents stated above must be derated if any of the following conditions apply:
• the ambient temperature exceeds +40 °C (+104°F)
• the AC supply voltage is higher than 400 V
• the drive is installed higher than 1000 m above sea level.
Note: The final derating factor is a multiplication of all applicable derating factors.
Ambient temperature derating
In the temperature range +40...55 °C (+104...131 °F), the continuous output current is derated linearly
as follows:
Derating factor
Supply voltage derating
With supply voltages above 400 V AC or 540 V DC, the continuous output current is derated linearly as
follows:
Derating factor
Altitude derating
At altitudes from 1000 to 4000 m (3300 to 13123 ft) above sea level, the derating is 1% for every 100 m
(328 ft). For a more accurate derating, use the DriveSize PC tool.
Note: If the installation site is higher than 2000 m (6600 ft) above sea level, connection of the drive to
an ungrounded (IT) or corner-grounded delta network is not allowed.
Technical data
1.00
0.70
+40 °C
+104 °F
1.00
0.86
400 V AC
540 V DC
Ambient temperature
+55 °C
+131 °F
Supply voltage
480 V AC
648 V DC
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