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 . .
③④
…
● Example: Serial number S ZVK5375000118 → Production date May 2018
Table 5-1
Production year and month
Digit
③
Production year
Digit
④
Production month
K
2018
1 ... 9
January ... September
L
2019
0
October
M
2020
N
November
…
…
D
December
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.
)RUPLQJIRUVWRUDJHWLPHVRI\HDUV
)RUPLQJIRUVWRUDJHWLPHVRI\HDUV
)RUPLQJIRUVWRUDJHWLPHVRIDQGPRUH\HDUV
8>@
W>K@
Figure 5-3
Forming the DC link capacitors
Commissioning
5.3 Preparing for commissioning
SINAMICS G120X converter
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC
155