Forming The Dc Link Capacitors - Siemens SINAMICS S150 Operating Instructions Manual

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
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 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:
Drive converter cabinet units
Operating Instructions, 07/07, A5E00288214A
– 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.
– 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.
Maintenance and servicing
11.5 Forming the DC link capacitors
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