Active Line Modules - Siemens SINAMICS S120 Equipment Manual

System overview
2.4 Line Modules
Line Connection Module
Figure 2-7
2.4.3

Active Line Modules

Active Line Modules can supply energy 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 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.
Line Connection Module
disconnector with
Figure 2-8
26
Circuit breaker
Line
reactor
Line Connection Module with Smart Line Modules connected in parallel
Switch Bypass Active
Interface
fuses contactor Module
Line Connection Module with Active Interface Module and Active Line Module ≤ 800 A,
example frane size HX + HI
=
Motor
Module
Smart Line
M
Module
3
Active Line
Module
=
Motor
Module
M
3
S120 Cabinet Modules Equipment Manual
Manual, (GH5), 10/2008, A5E00427098A