ABB DCS 600 MultiDrive Series - Page 15

Chapter 2 – Twelve–Pulse Technology
DCS 600 Manual for 12 – Pulse Operation II F2 2 - 7
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Figure 2/8_1
Note:
It is not possible to connect two 12-pulse systems at the same 12-
pulse transformer.
Reason: The voltage level between the star-delta winding is controlled
by the switching (control angle) of the first configuration. Connecting a
second configuration will create a circulating current.