Electrical Connection - Siemens SINAMICS S120 Equipment Manual

Line-side power components
2.5 Active Interface Modules
2.5.5

Electrical connection

The Active Interface Module is electrically connected in accordance with the connection
examples shown in section "Interface description".
Operating an Active Interface Module on an isolated-neutral network (IT system)
When the device is operated on an isolated-neutral network (IT system), the connection
bracket to the noise suppression capacitor must be removed (e.g.: see "1" in figure below).
The interface overview in the section "Interface description" shows the position of the
connection bracket on the different frame sizes.
With devices of frame sizes HI and JI, two connection brackets must be removed.
Figure 2-19
Failing to remove the connection bracket for the noise suppression capacitor on a non-
grounded system/IT system can cause significant damage to the unit.
66
Removing the connection bracket to the noise suppression capacitor (example: frame
size JI)
WARNING
Manual, (GH3), 10/2008, 6SL3097-2AE00-0BP3
Chassis power units