Siemens SINAMICS S120 Combi - Forming the DC Link Capacitors

Service and maintenance
13.4 Forming the DC link capacitors
334
SINAMICS S120 Combi
Manual, (GH9), 07/2016, 6SL3097-4AV00-0BP5
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
Modules Booksize Compact.
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-
XN
2067000015 for 2009, November):
Table 13- 2 Production year and month
Character
Year of manufacture
Character
Month of manufacture
X
2009
1 … 9
January ... September
A
2010
O
October
B
2011
N
November
C
2012
D
December
D 2013
E
2014
F
2015
The serial number is found on the rating plate.
Forming circuit
The S120 Combi Power Module has internal PTC resistors to pre-charge the DC link
capacitors. The resistors can be used to form the DC link capacitors of the S120 Combi
Module as well as the expansion axes (Motors Modules Booksize Compact).