Forming The Dc Link Capacitors - Siemens S120 Manual

Service and maintenance

11.4 Forming the DC link capacitors

11.4 Forming the DC link capacitors
NOTICE
Damage in the case of long storage periods
After being in storage for more than two years, the components may suffer damage when
switched on.
• Form the DC link capacitors of the Power Module again.
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 can be taken from the serial
number on the rating plate.
Note
The storage period starts from the date of manufacture and not from the date on which the
equipment was shipped.
Date of manufacture
The date of manufacture can be determined from the following assignment to the serial
number (e.g. T-S92067000015 for 2004, September):
Table 11- 2 Production year and month
Character
S
D
U
V
W
X
A
B
C
D
E
The serial number is found on the rating plate.
When DC link capacitors are formed, a defined voltage is connected to them and a defined
current flows so that the appropriate capacitor characteristics are restored for them to be re-
used as DC link capacitors.
480
Year of manufacture
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
Character
1 to 9
O
N
D
Manual, (GH6), 04/2014, 6SL3097-4AL00-0BP4
Month of manufacture
January to September
October
November
December
AC Drive