Installation Altitude And Ambient Temperature - Siemens SIRIUS 3RW44 System Manual

Configuration Instructions
2.4

Installation Altitude and Ambient Temperature

Ambient temperature
2-6
The permissible installation altitude must not exceed 5,000 m above sea level
(above 5,000 m on request).
If the installation altitude exceeds 1,000 m, the rated operating current must be
reduced for thermal reasons.
If the installation altitude exceeds 2,000 m, the rated voltage must also be
reduced because of the limited insulation strength. For installation altitudes
between 2,000 m and 5,000 m above sea level, only rated voltages ≤ 460 V are
allowed.
The following illustration shows the reduction in the rated device current in
relation to the installation altitude:
The rated operating current I
sea level or higher.
Figure 2-2:Current reduction in relation to the installation altitude
The 3RW44 soft starters are designed to be operated with a nominal current at
an ambient temperature of 40 ° Celsius. If this temperature is exceeded,
e.g. due to excessive heating up in the switchgear cabinet, other loads or due to
a higher general ambient temperature, this will influence the performance of the
soft starter and must be taken into account in the dimensioning process (refer to
Chapter 10.3.2 "Technical Data Power Unit").
must be reduced when installed at 1,000 m above
e
SIRIUS 3RW44 System Manual
GWA 4NEB 535 2195-02 DS 04