Siemens SINAMICS S120 Equipment Manual page 342

Service and Support Booksize
9.3 Reforming the DC link capacitors
Date of manufacture
The date of manufacture can be determined from the following assignment to the serial
number (e.g. T-S92067000015):
Table 9-1 Production year and month
Character
S
T
U
V
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 re-established for them to
be re-used as DC link capacitors.
Figure 9-1 Forming circuit
9-4
Year of manufacture
2004
2005
2006
2007
Character
1 to 9
O
N
D
Equipment Manual for Booksize Power Units
Equipment Manual, (GH2), 03/2006 Edition, 6SL3097-2AC00-0BP3
Month of manufacture
January to September
October
November
December