10.8 Restrictions for special ambient conditions
Permissible line supplies dependent on the installation altitude
● For installation altitudes ≤ 2000 m above sea level, it is permissible to connect the inverter
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.
Current derating depending on the installation altitude
The permissible inverter output current is reduced above an installation altitude of 1000 m.
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Figure 10-2 Current derating depending on the installation altitude, FSAA … FSC
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Figure 10-3 Current derating depending on the installation altitude, FSD … FSF
Technical data
10.8 Restrictions for special ambient conditions
SINAMICS G120C converter
414 Operating Instructions, 09/2017, FW V4.7 SP9, A5E34263257B AF
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