Active Line Modules With External Air Cooling; Description - Siemens SINAMICS S120 Manual

4.4

Active Line Modules with external air cooling

4.4.1

Description

Active Line Modules with external air cooling connect Motor Modules with the line supply.
Active Line Modules provide a constant DC link voltage for the Motor Modules
This ensures that they are not influenced by line voltage fluctuations.
When motors brake, Active Line Modules feed energy back into the line supply. The
regenerative feedback capability of the modules can be deactivated by parameterization.
The DC link starts precharging as soon as the line voltage is applied and is independent of
its phase sequence direction. Load can be applied to the DC link after the module has been
enabled.
A line contactor can be installed on the line side if the system has to be electrically isolated
from the line supply.
Active Line Modules can be directly connected to TN, IT and TT systems. The Line Modules
have an integrated overvoltage protection function.
External air cooling uses the "through-hole" method. The power unit and its heat sink can be
inserted in a rectangular knockout at the rear of the control cabinet and mounted with a seal.
Heat sink and the fan (included in the scope of supply) protrude beyond the rear of the
control cabinet and the heat is dissipated outside the control cabinet or in a separate air
duct.
Booksize Power Units
Manual, (GH2), 07/2016, 6SL3097-4AC00-0BP8
4.4 Active Line Modules with external air cooling
Line Modules Booksize
173