Forming Dc Link Capacitors - Siemens SINAMICS G120 Operating Instructions Manual

Commissioning
5.3 Preparing for commissioning
5.3.2

Forming DC link capacitors

Description
You may have to reform the DC link capacitors if the power module has been stored for more
than one year. When the converter is operational, DC link capacitors that have not been formed
can be damaged.
Table 5-1
Storage time from the date of manufacture
1 – 2 years
2 – 3 years
>3 years
The production date of the power module is coded in the 3rd and 4th digit of the serial number
on the rating plate: "S X ‑-
Table 5-2
Forming the DC link of PM240-2 and PM240P-2 Power Modules
You form the DC link capacitors by supplying the inverter with a line voltage of ≤ 100 % of the
rated voltage for a defined time.
Figure 5-2
128
The forming duration depends on how long the inverter was stored for
③ ④
Production year and month
③
Digit Year of manufacture
D 2013
E 2014
F 2015
H 2016
J 2017
K 2018
L 2019
M 2020
Forming the DC-link capacitors
Recommended forming duration
1 hour
2 hours
8 hours
X X X..."
④
Digit
1 ... 9
O
N
D
Operating Instructions, 04/2018, FW V4.7 SP10, A5E31759476B AG
Month of manufacture
January ... September
October
November
December
Converter with the CU250S-2 Control Units