Forming The Dc Link Capacitors - Siemens SINAMICS S120 Equipment Manual

Maintenance and service

10.5 Forming the DC link capacitors

10.5 Forming the DC link capacitors
Description
If the Power Module, Active Line Module and Motor Module have not been used for more
than two years, the DC link capacitors must be reformed. If this is not carried out, the units
could be damaged when the DC link voltage is connected under load.
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 rating plate.
Note
Storage period
It is important that the storage period is calculated from the date of manufacture and not from
the date that the equipment was shipped.
Rating plate
Figure 10-14 Nameplate using an Active Line Module as example
316
Water-cooled chassis power units for common cooling circuits
Manual, 08/2017, 6SL3097-4AM10-0BP0