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5.3.2
Forming DC link capacitors
Overview
You have to reform the DC link capacitors if the converter has been stored for more than one
year. Non-formed DC link capacitors can damage the converter in operation.
Precondition
The converter has not yet been used, and according to the production date it was made over
a year ago.
The production date of the converter is coded in the 3rd and 4th digit of the serial number on the
rating plate: S . .
● Example: Serial number S ZVK5375000118 → Production date May 2018
Table 5-1
Function description
Procedure for FSA ... FSG
You form the DC link capacitors by supplying the converter with a line voltage of ≤ 100% of the
rated voltage for a defined time.
Figure 5-3
SINAMICS G120X converter
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC
③④
...
Production year and month
③
Digit
Production year
K
2018
L
2019
M
2020
...
Forming the DC link capacitors
Digit
1 ... 9
...
5.3 Preparing for commissioning
④
Production month
January ... September
0
October
N
November
D
December
Commissioning
155
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