Forming Dc Link Capacitors - Siemens SINAMICS S120 Operating Instructions Manual

Preparations for use
3.5 Storage
NOTICE
Improper storage
Incorrect or excessively long storage can damage the equipment.
● Do not store the device outdoors.
● Observe the specified conditions for storing the device.
● Ensure that it is not stored for longer than the permissible maximum of two years.
Protection against humidity
● If a dry storage area is not available, then take the following precautions:
– Wrap the device in humidity-absorbent material. Then wrap the device in film so that it
– Place a humidity meter that can be read from outside inside the film wrapping. Observe
– Inspect the device regularly.
3.5.3

Forming DC link capacitors

If the Basic Line Modules, Active Line Modules, and Motor Modules have not been used for
more than two years, then you must reform the DC link capacitors. If you do not reform the
capacitors, the units could be damaged after the DC link voltage is applied under load.
If the units are commissioned within two years of their date of manufacture, the DC link
capacitors do not need to be reformed. The date of manufacture is coded in the serial number
on the rating plate.
Note
You can find a description of how to form the DC link capacitors in the "SINAMICS S120
Cabinet Modules" Manual, Chapter, "Maintenance and service".
60
is airtight.
the values provided in the technical specifications on relative humidity. Check the values
regularly using the humidity meter.
Applications for Cabinet Modules, liquid cooled
Operating Instructions, 04/2015, A5E35974555A