Siemens SIRIUS System Manual

3RW3 semiconductor motor control unit
SIRIUS System Manual
8-50
GWA 4NEB 430 0999-02b
8.7.3 Site altitude
If the site altitude is above 1000 m, the following are necessary:
• A reduction in the rated current for thermal reasons
• A reduction in the rated voltage on account of the diminished dielectric
strength
Reductions as a func-
tion of site altitude
The diagram below plots the reductions in rated current and rated operating
voltage as a function of site altitude:
Figure 8-25: Reductions as a function of site altitude
0 500 1000 1500 2000 2500 3000 3500 4000
70
75
80
85
90
95
100
105
Ue reduction
Ie reduction
Site altitude in m

Siemens SIRIUS Specifications

General

Brand	Siemens
Model	SIRIUS
Category	Relays
Language	English