Parallel Connection Of Sinamics Dcm Units - Siemens SIMOREG DC-MASTER Operating Instructions Manual

Connecting
6.3.2

Parallel connection of SINAMICS DCM units

The following topologies are possible when connecting SINAMICS DCM in parallel:
•
12-pulse parallel connection:
Each of the two SINAMICS DCM should be equipped with one SIMOREG CCP.
Interconnection and parameterization is just the same as for a single SINAMICS DCM.
•
6-pulse parallel connection:
Each of the SINAMICS DCM used should be equipped with one SIMOREG CCP.
Parameterization is just the same as for a single SINAMICS DCM.
Note
For series connections it is not permissible to use a SIMOREG CCP.
A SIMOREG CCP is directly connected in parallel to each of the converter units connected in
parallel (SINAMICS DCM).
Each SINAMICS DCM must be equipped with a supplementary module "fast pulse cancellation
interface" (Firing Unit Trigger Board) - available as accessory - also refer to Chapter
5.2 (Installation) and 6.3.3 (connection).
Ordering data, refer to chapter 2.2 (ordering data for options and accessories)
The interconnection must be made according to the following diagram.
Mode of operation:
•
The inverter commutation fault monitoring is continuously active in the SINAMICS DCM.
•
If an inverter commutation fault is identified in a SINAMICS DCM then a turn-off command is
issued to the associated SIMOREG CCP.
The turn-off command is transferred via the serial connection 3.2.
•
The turn-off command is transferred from this SIMOREG CCP to the additional SIMOREG
CCP. All SIMOREG CCP units simultaneously execute the turn-off operation.
The turn-off command is transferred via the turn-off pulse interface 3.3, with which all
SIMOREG CCPs are connected with one another.
•
At the same time, the firing pulses are immediately disabled in all SINAMICS DCM units from
the assigned SIMOREG CCP. This therefore ensures that the SINAMICS DCM, which have
(still) not identified an inverter commutation fault, do not prevent the turn-off operation.
The firing pulses are disabled via the fast pulse cancellation interface 3.4.
CAUTION
The parallel interface (X165, X166) at the SINAMICS DCM is not compatible to the parallel
interface (X165) at the SIMOREG DC-MASTER CCP. It is not permissible that both connectors are
connected.
34
ENGLISH
SIMOREG DC-MASTER Converter Commutation Protector
12.2010
Siemens AG 6RX1700-0DD74
Operating Instructions