Siemens SINAMICS S120 - Replacing the Pre-Charging Resistors of the DC Interface (Option L37)

Maintenance and servicing
6.4 Replacing components
Cabinet Modules NEMA
322 Manual, 04/2014, A5E03586450A
6.4.13
Replacing the pre-charging resistors of the DC interface (option L37)
Preparatory steps
● Disconnect the cabinet from the power supply (do not forget the external power supplies).
Removal
1. Remove the DC interface (see section "Replacing the DC interface")
2. Remove the fastening screws for the pre-charging resistors.
3. Remove the resistors.
Installation
1. Insert the new resistors.
2. Tighten the fastening screws of the pre-charging resistors.
3. Re-install the DC interface.