Smart Line Modules; Active Line Modules - Siemens SINAMICS S120 Manual

System overview
2.4 Line Modules
2.4.3

Smart Line Modules

Smart Line Modules can supply energy to the DC link and return regenerative energy to the
supply system. A Braking Module and braking resistor are required only if the drives need to
be decelerated in a controlled manner after a power failure (i.e. when energy cannot be
recovered to the supply). When a Smart Line Module is used as the infeed, the
corresponding line reactor is a standard requirement.
For a compact configuration, Line Connection Modules up to input currents of 3,200 A are
available. Two Smart Line Modules can be operated in parallel on these Line Connection
Modules.
G_D213_DE_00045a
Figure 2-5
2.4.4

Active Line Modules

Active Line Modules can supply energy to the DC link and return regenerative energy to the
line supply. A Braking Module and braking resistor are required only if the drives need to be
decelerated in a controlled manner after a power failure (i.e. when energy cannot be fed
back to the supply).
In contrast to Basic Line Modules and Smart Line Modules, however, Active Line Modules
generate a regulated DC voltage, which remains constant despite fluctuations in the line
voltage. In this case, the line voltage must remain within the permissible tolerance range.
Active Line Modules draw a virtually sinusoidal current from the supply system and cause
virtually no line harmonic distortions.
Active Line Modules are always used in conjunction with an Active Interface Module. Active
Interface Modules include the required pre-charging input circuit for the Active Line Module,
in addition to a Clean Power Filter.
These two components are considered to be an integral unit for SINAMICS S120 Cabinet
Modules and are supplied together.
For a compact configuration, Line Connection Modules up to input currents of 3,200 A are
available. Two Active Line Modules with their associated Active Interface Modules can be
operated in parallel on these Line Connection Modules.
26
Line Connection Module
Load
Main Line
disconnector
contactor
reactor
with fuses
Line Connection Module with Smart Line Module
Smart Line Smart Line
Module Module
=
Motor
Module
M
3
Cabinet Modules
Manual, (GH5), 05/2010, A5E03263538A