Chapter 4 -Planning
DCS 500 12-Pulse Planning and Start-Up 4 - 1
Components
The following components are required for constructing a 12-pulse
system:
- a transformer with two identical secondary windings offset by 30
degrees
(same voltage and current)
- two identical 6-pulse power converters (DCS 500 standard), se-
lected for half the motor’s rated current
(same voltage and current)
- a current-balancing reactor (interphase reactor) with centre tap
- a field supply unit for supplying the field of the DC machine
- a connecting cable between the two power converters, Plug
Connector X18: (max. length 10 m).
to be supplied in the requisite length by ABB
The data relevant to 12-pulse mode are exchanged between Plug
Connectors X18: on the computer boards of the two power con-
verters.
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