Connection 09.02
3-54 Siemens AG 6SE7087-6AK85-1AA0
Rectifier/Regenerating Unit Operating instructions
c) Example of a configuration for 12-pulse mode and parallel connection of units of size K to obtain the
maximum output current
In the following example of a power section arrangement with autotransformers and a reactor arrangement
for a "high-power supply", 2 groups of size K units operate in 12-pulse mode to obtain the maximum possible
output current. The first group of units
comprises a basic unit parameterized as a "12-pulse master" to which
2 parallel units
(not containing a CUR electronic module, see Section 3.7) are connected in parallel. The
second group of units
comprises a basic unit parameterized as a "12-pulse slave" to which 2 parallel units
are also connected in parallel.
X27
X28
X27
X28
X27
X28
X27
X28
X117
X117
Arrangement for high-power system
Mains
DC link
"12-pulse transformer"
Reactor
Reactor
Reactor
Reactor
Reactor
Reactor
Autotransformer
Auto-
transformer
Autotransformer
Autotransformer
Auto-
transformer
Auto-
transformer
12-pulse master
Rectification
Regeneration
12-pulse slave
Rectification
Regeneration
Parallel unit
Rectification
Regeneration
Parallel unit
Rectification
Regeneration
Parallel unit
Rectification
Regeneration
Parallel unit
Rectification
Regeneration
Figure 3.41 Example of a configuration for 12-pulse mode and parallel connection of units of size K to obtain the maximum output
current
3.8.3 Parameterization for 12-pulse mode
In this application, two 6SE70 units
(rectifier/regenerating units) are coupled via the SST2 serial interface
(optional RS485 interface PTP1) using "Peer-to-Peer" protocol
. One unit is parameterized as a 12-pulse
master and one is parameterized as a 12-pulse slave.
Selection of the basic or reserve setting (index i001 or i002) of the appropriate "Source selection parameter“
(P554, P555, ...) is described in Section 4.1.2.
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