Forming The Dc Link Capacitors - Siemens SINAMICS S120 Equipment Manual

12.4

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-E92067000015 for 2014, September):
Table 12- 2
Character
A
B
C
D
E
F
H
J
K
L
M
N
O
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.
AC Drive
Manual, 06/2019, 6SL3097-5AL00-0BP1
Production year and month
Year of manufacture
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
Service and maintenance
12.4 Forming the DC link capacitors
Character Month of manufacture
1 to 9 January to September
O October
N November
D December
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