Rectifier/Regenerating Unit - Siemens Simovert 6SE70 Series Operating Instructions Manual

https://www.aotewell.com
Start-Up
♦
Closed-loop control variant:
a) Parallel connection (see Section 3.7)
The output current can be increased by connecting up to 2 "parallel units of identical rated
current in parallel with the power section of a rectifier/regenerating unit of size K ("basic
unit"). The "basic unit" controls the DC-link voltage. The firing pulses of the basis unit are
transmitted to the parallel unit(s) via ribbon cable. A parallel unit does not contain a CUR
electronic module.
When connected in parallel, the load current must be reduced by 10 % with respect to the
total rated current.
Due to the use of identical power sections, commutating reactors, autotransformers as well
as identical cable lengths for connection to the mains supply, an almost symmetrical division
of current between the "basic unit" and the "parallel unit(s)" can be ensured.
b) 12-pulse mode (see Section 3.8)
Two rectifier/regenerating units are connected in parallel on the output side and fed on the
line side with galvanically isolated AC supplies, each displaced by 30 degrees. A
rectifier/regenerating unit controls the DC-link voltage and supplies a second
rectifier/regenerating unit with the current setpoint. The second rectifier/regenerating unit
that is linked to the first via the SST2 serial interface (RS485 interface option) with peer-to-
peer protocol only becomes a "12-pulse slave" after parameterization.
12-pulse mode is used to reduce the harmonic loading on the system and to increase the
performance for high-power rectifier/regenerating units.
"Process data":
♦
"Process data" are commands and setpoints from "outside" fed into the rectifier/regenerating
unit, as well as signals and actual values which are output from the rectifier/regenerating unit
Sources
- Binary inputs BE
(terminals)
- Parameterizing unit (PMU)
- Operator control panel (OP)
- Serial interfaces
(SST1, SST2, SCB, CB, TB)
- Serial interfaces
(SST1, SST2, SCB, CB, TB)
4-2
AoteWell LTD
AoteWell Automation Sales Team
Process data
Commands
"Control Word"
e.g.: "ON command"
Setpoint
chanal
Op./cl-loop
control
Setpoints
Only: Id setpoint in
12-pulse operation

Rectifier/regenerating unit

Buy Siemens PLC HMI Drives at AoteWell.com
- Binary outputs BA
(terminals)
- Parameterizing unit (PMU)
Messages
- Operator control panel (OP)
"status word"
- Serial interfaces
(SST1, SST2, SCB, CB, TB)
e.g.: "fault
- Analog outputs AA
(terminals)
- Parameterizing unit (PMU)
Actual values
- Operator control panel (OP)
- Serial interfaces
e.g. output current
(SST1, SST2, SCB, CB, TB)
Siemens AG
Rectifier/Regenerating Unit
https://www.aotewell.com
Sales@aotewell.com
09.02
Destinations
6SE7087-6AK85-1AA0
Operating Instructions