Line Modules; General Information; Basic Line Modules - Siemens SINAMICS S120 Manual

2.4

Line Modules

2.4.1

General information

Power is fed to the drive line-up via Line Modules, which generate a DC voltage from the line
voltage and, therefore, supply energy to the Motor Modules connected to the DC link. They
are suitable for connection to systems grounded at the neutral point (TN, TT) and non-
grounded (IT) systems.
The Line Modules are connected to the incoming supply via Line Connection Modules and
are implemented in accordance with EN 61800-3 Category C3.
2.4.2

Basic Line Modules

Basic Line Modules are designed only for infeed operation, i.e., they are not capable of
feeding regenerative energy back into the supply system.
If regenerative energy is produced, e.g., when braking drives, it must be converted to heat by
means of a supplementary braking module and a braking resistor.
When a Basic Line Module is used as the infeed, a line reactor is included. If the infeed is
realized via a transformer with an appropriate rating in 6-pulse operation with a Basic Line
Module or in 12-pulse operation with two Basic Line Modules, the line reactor is optional and
can be omitted.
If two or more Basic Line Modules are operated in parallel on a common supply system in
order to increase power, line reactors are also included in the associated Line Connection
Module.
For a compact configuration, Line Connection Modules up to input currents of 3,200 A are
available. Two Basic Line Modules can be operated in parallel on these Line Connection
Modules. When Basic Line Modules are connected in parallel, for selective protection of the
individual devices, line-side fuses are installed.
Figure 2-2
Cabinet Modules
Manual, 03/2013, A5E03263538A
Line Connection Module with Basic Line Module ≤ 800 A
=
M
3
System overview
2.4 Line Modules
29