Forming The Dc Link Capacitors - Siemens SINAMICS S120 Combi Manual

13.4

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.
• Reform the DC-link capacitors on the S120 Combi Power Modules and the Motor
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 is calculated from the date of manufacture and not from the date that the
equipment was shipped.
A defined voltage and a limited current are applied to the DC-link capacitors when forming
them. As a consequence, the internal relationships required for the DC-link capacitors to
function correctly are re-established.
Date of manufacture
The date of manufacture can be determined from the following assignment to the serial
number (e.g. T-XN2067000015 for 2009, November):
Table 13- 2
Character
X
A
B
C
D
E
F
H
J
K
The serial number is found on the rating plate.
SINAMICS S120 Combi
Manual, 11/2017, 6SL3097-4AV00-0BP7
Modules Booksize Compact.
Production year and month
Year of manufacture Character
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
13.4 Forming the DC link capacitors
Month of manufacture
1 ... 9 January ... September
O October
N November
D December
Service and maintenance
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