Siemens SINAMICS S120 Equipment Manual page 303

Replacement steps
1. Remove the nuts (x 4).
2. Remove the nuts (x 4).
3. Remove the nut (x 1).
The slide-in unit with the DC fuses can now be withdrawn completely.
Note
The slide-in unit with the DC fuses must be pulled out completely and placed on a stable
surface.
The screws and nuts must now be unscrewed and removed from the DC fuses as necessary
in order to change the relevant DC fuses.
Note
Frame size HX contains two DC fuses and frame size JX four DC fuses.
If you order a complete power unit as a replacement, make sure that only DC fuses are
used. If option L37 (DC interface with pre-charging input circuit) is installed in your cabinet,
the DC fuses of the spare part must be replaced with the lugs of the existing power unit.
S120 Cabinet Modules Equipment Manual
Manual, (GH5), 10/2008, A5E00427098A
Maintenance and servicing
6.4 Replacing components
303