Pre-Charging Input Circuit For Active Interface Modules Chassis-2 - Siemens SINAMICS S120 Manual

Line-side power components
4.7 Active Interface Modules Chassis-2
NOTICE
Damage to the device through not removing the connection clip with a non-grounded
line supply
Failure to remove the connection clip to the basic interference suppression module on an
ungrounded line supply (IT system) can cause significant damage to the device.
• With a non-grounded line supply (IT system), remove the connection clip to the basic
Removing the connector jumper on the VSM10 Voltage Sensing Module
When operating the Active Interface Module Chassis-2 on a non-grounded line supply (IT
system), at the Voltage Sensing Module (VSM10), remove the plug-in jumper in terminal
X530 at the lower side of the component.
Use two screwdrivers or another suitable tool to relieve the holding springs in the terminal
and then withdraw the plug-in jumper.
Terminal X530 with connector jumper
4.7.7

Pre-charging input circuit for Active Interface Modules Chassis-2

Description
The precharging input circuit ensures there is a current-limited precharging of the DC link
capacitors of the Active Line Module Chassis-2 and the connected Motor Modules during the
switch-on procedure.
After pre-charging is complete, the main contactor is closed and the pre-charging input
circuit is bridged, then the Active Interface Module Chassis-2 is connected directly to the
supply system.
The precharging circuit comprises a precharging contactor, precharging resistors and a main
contactor; the circuit must be protected against overcurrent using suitable protection
elements.
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interference suppression module.
Relieve the springs and withdraw the connector
jumper
Air-cooled chassis power units
Equipment Manual, 06/2020, 6SL3097-5AE00-0BP3