sinamics

06/05 Maintenance and Servicing
11.5 Reforming the DC Link Capacitors
Description
If the cabinet unit is kept in storage for more than 2 years, the DC link capacitors
have to be reformed. If this is not carried out, the cabinet may be damaged when
the supply voltage is switched on.
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 is indicated in
the serial number on the type plate (see "Device Overview").
NOTE
It is important that the period of storage is calculated as of the date of manufacture
and not as of the delivery date.
Procedure
The DC link capacitors are reformed by applying the rated voltage without load for
at least 30 minutes at room temperature.
• Operation via PROFIBUS:
– 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 waiting time has elapsed, switch off the converter and restore the
original PROFIBUS setting.
• Operation via terminal block:
– Set p0852 to "0" (factory setting is "1").
– Switch on the converter (via digital input 0 on the customer terminal block).
– Once the waiting time has elapsed, switch off the converter and restore the
original setting for p0852.
NOTE
Reforming cannot be carried out in LOCAL mode via the AOP30.
SINAMICS G150
Operating Instructions 11-41