Replacing The Pre-Charging Resistors Of The Dc Interface (Option L37) - Siemens SINAMICS S120 Manual

Maintenance and servicing
6.4 Replacing components
6.4.13

Replacing the pre-charging resistors of the DC interface (option L37)

Preparatory steps
● Observe the "five safety rules".
● Disconnect the cabinet from the power supply (do not forget the external power supplies).
Removal
1. Remove the DC interface (see the section titled "Replacing the DC interface for Booksize
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.
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Cabinet Kit").
Cabinet Modules
Manual, (GH5), 05/2010, A5E03263538A