Derating; Ambient Temperature Derating; Altitude Derating - ABB ACSM1 Hardware Manual

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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 regen supply module 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

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 regen
supply module to an ungrounded (IT) or corner-grounded delta network is not allowed.
Technical data
1.00
0.70
+40 °C
+104 °F
Ambient temperature
+55 °C
+131 °F