Siemens SINAMICS S120 - Forming the DC Link Capacitors

Maintenance and servicing
6.5 Forming the DC link capacitors
Cabinet Modules NEMA
Manual, 04/2014, A5E03586450A
325
6.5
Forming the DC link capacitors
Description
If the Basic Line Modules, Smart Line Modules, Active Line Modules, and Motor Modules
have not been used for more than two years, the DC link capacitors must be re-formed. If
this is not done, the units could be damaged after the DC link voltage is applied under load.
If commissioning takes place within two years of the date of manufacture, the DC link
capacitors do not need to be re-formed. The date of manufacture is indicated in the serial
number on the nameplate.
Note
Storage period
It is important that the storage period be calculated from the date of manufacture and not
from the date that the equipment was shipped
.
Nameplate
Figure 6-31 Nameplate using an Active Line Module as example