Derating As A Function Of The Installation Altitude - Siemens SINAMICS G120D Operating Instructions Manual

Technical data

12.5 Derating as a function of the installation altitude

12.5 Derating as a function of the installation altitude
Voltage
The clearance within the converter can isolate surge voltages in accordance with
overvoltage category III in compliance with the EN 60664-1 regulation up to 2000 m above
sea level.
At altitudes above 2000 m and below 4000 m above sea level, the converter has to be
connected that at least one of the following conditions is fulfilled:
● It is connected to a TN-network with isolated star-point (not an external grounded
connector)
or
● it is connected through an isolating transformer that provides a TN-network with a
grounded star-point.
A reduction of the line voltage is not necessary.
Note: The connected engines and power components must be considered separately.
Current
258
Converter with control units CU240D-2
Operating Instructions, 04/2014, FW V4.7, A5E34262100B AA