Siemens SINAMICS S120 Manual page 379

Description
The DC fuses are installed in a fuse insert. To replace the fuses, the fuse insert be removed.
NOTICE
Replace all DC fuses at the same time
After a DC fuse trips, always replace all DC fuses at the same time. Only fuses of the same
type may be installed.
Preparatory steps
● Disconnect the drive line-up from the power supply
● Allow unimpeded access
● Remove the protective cover
Removal
The removal steps are numbered in accordance with the numbers in the diagram.
1. Release the DC connections at DCP and DCN (four screws each)
2. Remove nuts (eight screws).
3. Remove the retaining screws for the connection plate of the housing (four screws) and
4. Remove the retaining screws for the fuse insert (one screw).
You can now remove the fuse insert.
NOTICE
Do not damage any signal cables or plastic parts
When removing the fuse insert, make sure that no signal cables or plastic parts are
damaged.
You can then replace the DC fuses.
Installation steps
Installing is the same as removing, however in the reverse order.
NOTICE
Pay attention to the tightening torques
The tightening torques specified in the table "Tightening torques for screw connections"
must be observed.
Chassis power units
Manual, (GH3), 01/2013, 6SL3097-4AE00-0BP3
remove the connection plate.
Maintenance and Servicing
8.4 Replacing components
377