8 3RW3 semiconductor motor control unit (soft starter) - Siemens ...
8 3RW3 semiconductor motor control unit (soft starter) - Siemens ...
8 3RW3 semiconductor motor control unit (soft starter) - Siemens ...
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<strong>3RW3</strong> <strong>semiconductor</strong> <strong>motor</strong> <strong>control</strong> <strong>unit</strong><br />
8.7.3 Site altitude<br />
If the site altitude is above 1000 m, the following are necessary:<br />
• A reduction in the rated current for thermal reasons<br />
• A reduction in the rated voltage on account of the diminished dielectric<br />
strength<br />
Reductions as a function<br />
of site altitude<br />
The diagram below plots the reductions in rated current and rated operating<br />
voltage as a function of site altitude:<br />
105<br />
100<br />
95<br />
90<br />
85<br />
80<br />
75<br />
70<br />
Ue reduction<br />
Ie reduction<br />
0 500 1000 1500 2000 2500 3000 3500 4000<br />
Site altitude in m<br />
Fig. 8-26: Reductions as a function of site altitude<br />
SIRIUS System Manual<br />
8-50 GWA 4NEB 430 0999-02c
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