11.5 Derating data
11.5.1 Current derating as a function of the installation altitude
The permissible converter output current is reduced above an installation altitude of 1000 m.
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Permissible line supplies dependent on the installation altitude
● For installation altitudes ≤ 2000 m above sea level, it is permissible to connect the converter
to any of the line supplies that are specified for it.
● For installation altitudes 2000 m ... 4000 m above sea level, the following applies:
– Connection to a TN line system with grounded neutral point is permissible.
– TN systems with grounded line conductor are not permitted.
– The TN line system with grounded neutral point can also be supplied using an isolation
transformer.
– The phase-to-phase voltage does not have to be reduced.
Note
Using converters connected to TN line supplies with voltages ≥ 600 V for installation altitudes
2000 m … 4000 m
For voltages ≥600 V, the TN line supply must have a grounded neutral point established using
an isolation transformer.
Technical data
11.5 Derating data
SINAMICS G120X converter
1092 Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC
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