Reforming The Dc Link Capacitors - Siemens SINAMICS S120 Equipment Manual

Installing the fan:
1. Before installing the fan, check the air flow direction
2. Insert the connector until it fully engages.
3. Insert the fan until it latches into place.
4. Close the fan cover.
9.3

Reforming the DC link capacitors

9.3
Caution
If the Active Line Module, Smart Line Module and Motor Module have not been used for
more than two years, the DC link capacitors must be re-formed. If this is not carried-out, the
units could be damaged when the power supply voltage is connected.
If the cabinet is commissioned within two years of its date of manufacture, the DC link
capacitors do not need to be reformed. The date of manufacture can be taken from the serial
number on the type plate.
Note
It is important that the storage period is calculated from the date of manufacture and not
from the date that the equipment was shipped.
Procedure
The DC link capacitors are re-formed by applying the rated voltage without load for at least
30 minutes at room temperature.
Equipment Manual for Booksize Power Units
Equipment Manual, (GH2), 03/2006 Edition, 6SL3097-2AC00-0BP3
(the arrow on the fan must point towards the cooling ribs).
It is not permissible to crush the connecting cables!
Service and Support Booksize
9.3 Reforming the DC link capacitors
9-3