Siemens PM240-2 Hardware Installation Manual page 93

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
TN line supply for 690 V Power Modules for installation attitudes extending from 2000 m to
4000 m
For 690 V Power Modules, the TN line system must be established with grounded neutral
point through an isolating transformer.
Power Module PM240-2
Hardware Installation Manual, 12/2015, A5E33294624B AD
isolation transformer.
7.6 Restrictions for special ambient conditions
Technical data
93