Forming The Dc Link Capacitors - Siemens SINAMICS G150 Operating Instructions Manual

Maintenance and servicing

11.5 Forming the DC link capacitors

11.5 Forming the DC link capacitors
Description
If the device is kept in storage for more than 2 years, the DC link capacitors have to be re-
formed. If this is not done, the unit could be damaged when it is operated 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 is indicated in the serial
number on the type plate (see "Device Overview").
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.
● Operation via PROFIBUS:
● Operation via terminal block:
Note
Reforming cannot be carried out in LOCAL mode via the AOP30.
574
– Set bit 3 of control word 1 (operation enable) permanently to "0".
– Switch on the converter by means of an ON signal (bit 0 of the control word); all the
other bits must be set in such a way that the converter can be operated.
– Once the delay time has elapsed, switch off the converter and restore the original
PROFIBUS setting.
– Set p0852 to "0" (factory setting is "1").
– Switch on the converter (via digital input 0 on the customer terminal block).
– Once the delay time has elapsed, switch off the converter and restore the original
setting for p0852.
Converter cabinet units
Operating Instructions, 03/2012, A5E03263466A