Siemens 340 Manual page 55

Dependence of the rated operational current on the installation altitude
The permissible rated operational current of the 3RM1 motor starter is reduced as shown in
the diagram depending on the installation altitude:
Note
Maximum installation altitude of 3RM11/3RM13 Failsafe motor starters: 2000 m
Installation altitudes of more than 2000 m are not admissible for 3RM11/3RM13 Failsafe
motor starters.
From an installation altitude in excess of 2000 m, in the case of Standard 3RM10/3RM12
motor starters the maximum permissible operational voltage must be reduced due to the
limited insulation strength. You can obtain details on request from SIEMENS Technical
Assistance (http://www.siemens.com/industrial-controls/technical-assistance).
SIRIUS 3RM1 motor starter
Manual, 11/2013, A5E0345285095020A/RS-AB/002
4.1 Rated operational current and derating
Configuration
55