Parallel Connection Of Power Units; Description - Siemens SINAMICS S120 Function Manual
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Also See for SINAMICS S120:
- Function manual (1094 pages) ,
- Diagnostic manual (947 pages) ,
- Manual (848 pages)
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7.11
Parallel connection of power units
7.11.1
Description
Description
Power units (infeeds and Motor Modules) can be connected in parallel with SINAMICS
firmware version V2.3 and higher.
All the functions required for parallel operation are stored in the firmware of the Control Unit.
The modular SINAMICS S120 drive system provides the option of operating infeeds and
Motor Modules in parallel on S120 Chassis and on S120 Cabinet Modules. SINAMICS S120
units in booksize and blocksize format cannot be operated in parallel.
S120 Motor Modules can be operated in parallel in vector control mode, but not in servo
control.
With the objective of extending the SINAMICS power spectrum, SINAMICS S120 supports
the parallel connection of identical power units (identical in terms of type, rated voltage, unit
rating and firmware version) at the motor and infeed ends, as well as the parallel connection
of Motor Modules of identical type. It is therefore not permissible to mix different variants of
power unit within the same parallel connection (e.g. a mixture of Basic Line Modules with
Smart Line Modules or Basic Line Modules with Active Line Modules).
It can be beneficial to connect power units (infeeds and Motor Modules) in parallel for a
variety of reasons:
● To boost the converter output if it is not technically or economically feasible to achieve
● To increase availability in cases where it is necessary after a converter malfunction to
Features
The main characteristics of the parallel connection are:
● Parallel connection of up to four Motor Modules on one motor
Drive functions
Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
the required output power by any other means.
maintain emergency operation during which the unit can operate at a lower output than its
rated value.
– Parallel connection of multiple Motor Modules on one motor with separate winding
systems (p7003 = 1).
Note:
Motors with separate winding systems are recommended.
– Parallel connection of multiple Motor Modules on one motor with a single winding
system (p7003 = 0).
CAUTION
Additional information and instructions in the Equipment Manual must be carefully
taken into consideration.
Function modules
7.11 Parallel connection of power units
321
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