Installation Height And Ambient Temperature - Siemens SIRIUS 3RW44 Manual

Configuration Instructions
2.4

Installation Height and Ambient Temperature

Ambient temperature
2-6
The permissible installation height must not exceed 3000 m above sea level
(above 3000 m on request).
If the installation height exceeds 1000 m, the rated operating current must be
reduced for thermal reasons.
If the installation height exceeds 2000 m, the rated voltage must also be reduced
because of the limited insulation strength. For installation heights between
2000 m and 5000 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 height:
From 1000 m above sea level, the rated operating current I
120%
110%
100%
90%
80%
Ie
70%
60%
50%
40%
30%
1000
0 500 1500
Aufstellungshöhe in m über NN
Fig. 2-2: Current reduction in relation to the installation height
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. by
excessive heating up in the switchgear cabinet, by other loads or by 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 9.3.2 "Technical Data Power Electronics").
3000
2000 2500
must be reduced.
e
SIRIUS 3RW44 manual
GWA 4NEB 535 2195-02 DS 02