Forming The Dc Link Capacitors - Siemens SINAMICS S120 Manual

Maintenance and servicing

6.5 Forming the DC link capacitors

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 reformed. If this
is not carried out, the units could be damaged after the DC link voltage is applied under load.
If the cabinet is commissioned within two years of its date of manufacture, the DC link
capacitors do not need to be re-formed. 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 6-31
342
Rating plate using an Active Line Module as example
Cabinet Modules
Manual, 03/2013, A5E03263538A