Chapter 3 – Twelve–Pulse Parallel Configurations with DCS 600
DCS 600 Manual for 12 – Pulse Operation
II F2
3 - 5
3.3 Functional description of 12 – pulse parallel configurations
Switch-on/switch-off
logic
The possible switch-on/switch-off options for the DCS 600 are mul-
tifarious, as are the possible switching and operator control loca-
tions, like unit terminals, overriding control system, control panel
CDP 312 and DriveWindow. So as not to lose this flexibility, we
have refrained from changing the 6 – pulse standard logic (see
chapter “2.6 Control, Trip, Emergency operation ”)
Dynamic response The dynamic response of the 12 – pulse configuration is delayed in
comparison to a 6 – pulse converter by:
• +0.5 control cycles (3,3 msec at 50 Hz) due to the 30 degree
offset mains supply to the slave
• +3 up to 4 control cycles due to the behaviour on bridge re-
versal (see “bridge reversal”)
The signals are processed independently of each other in each
converter.
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