Configuration Of Two Infeeds Connected In Parallel - Siemens SINUMERIK 840D sl Commissioning Manual

Commissioning NC-controlled drives
6.3 Guided commissioning of SINAMICS drives
6.3.4

Configuration of two infeeds connected in parallel

Condition
The SINAMICS S120 supports the parallel connection of Line Modules under the following
conditions:
● Same type
● Same type rating:
Available for following Active Line Modules: 55, 80 and 120 kW
● Same rated voltage
● Same firmware version
The parallel connection of two Active Line Modules in booksize format must be supplied by a
shared line connection and controlled synchronously by a shared Control Unit. The modules
must not be connected to galvanically isolated lines.
Benefits
For space reasons, some applications require the use of Line Modules in booksize format, but
the available performance range with a single booksize Line Module is insufficient for the
application.
The parallel connection of booksize Active Line Modules offers the following advantages:
● Extension of the power range by higher S1 and maximum powers for S120 in booksize
format
● Higher maximum prechargeable DC-link capacity up to 38 mF
● Only a shared DC link with energy exchange between all connected drives is required.
● Usable in Active Mode, Smart Mode and Extended Smart Mode of the infeed
● Commissioning is simple because no additional parameter assignment is required.
– The commissioning engineer sees only a larger Active Line Module.
– No additional effort is required for commissioning and data backup.
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CNC Commissioning: NC, PLC, Drive
Commissioning Manual, 12/2019, A5E48312804B AA