Siemens SENTRON - Autotransformer

Accessories
9.7 Autotransformer
Manual, 08/2017, L1V30368969104A-02
157
9.7
Autotransformer
With the autotransformer, the necessary rated voltage of 230 V AC can be generated in a
three-phase 3-wire network without neutral. The method of mounting and connecting the
autotransformer can be seen in the section titled Installing and connecting an
autotransformer (400 V / 230 V) (Page 79).
Figure 9-19 Autotransformer (400 V / 230 V) 3KC9824–1
Use of a dual power supply is recommended for the 3KC4 transfer switching equipment. In
this case, 2 autotransformers are required both for the 3KC4 transfer switching equipment
and for the 3KC8 transfer switching equipment respectively.
Current rating
Number of poles
Position
Product number
250 A … 3200 A 3 - 3KC9824-1