Current Derating - Depending On The Installation Altitude - Siemens SINAMICS G120D Series Operating Instructions Manual

11.6

Current derating - depending on the installation altitude

Current derating depending on the installation altitude
Above 1000 m above sea level you must reduce the inverter output current as a result of the
lower cooling capability of the air.
Permissible line supplies depending on the installation altitude
● Installation altitude up to 2000 m above sea level
– Connection to every supply system permitted for the inverter.
● Installation altitudes between 2000 m and 4000 m above sea level
– Connection to a TN system with grounded neutral point.
– TN systems with grounded line conductor are not permitted.
– The TN line system with grounded neutral point can also be supplied using an
– The phase-to-phase voltage does not have to be reduced.
Note
690 V Power Modules
For 690 V Power Modules, the TN line system must be established with grounded neutral
point through an isolating transformer.
Converter with control units CU240D-2
Operating Instructions, 04/2015, FW V4.7.3, A5E34262100B AB
isolation transformer.
11.6 Current derating - depending on the installation altitude
Technical data
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