Siemens Sinamics S120 Manual page 404

Maintenance and servicing
10.5 Forming the DC link capacitors
Date of manufacture
The date of manufacture can be determined as follows:
Table 10- 2
Procedure in the event of repair or replacement
A replacement Line Module or Motor Module or the corresponding replacement power block
has to be reformed after being in storage for a period of more than two years.
The DC link capacitors are reformed by applying the rated voltage without load for at least
30 minutes.
To do this, the DC link must be precharged (i.e. the Line Modules switched on), while the
controller for the existing Motor Modules must not be enabled for the specified length of time.
Procedure for reforming outside the drive line-up
Replacement power units which have to be held ready for immediate use in the event of
repair or replacement can also be reformed individually and outside the drive line-up.
For this, the equipment must be connected to the forming circuits described in the following.
Components for the forming circuit (recommendation)
● 1 fuse switch 3-phase 400 V / 10 A or 690 V / 10 A
● 3 incandescent lamps 230 V / 100 W for a line voltage of 380 to 480 V 3 AC.
Alternatively, use 3 resistors of 1 kΩ / 100 W each (e.g. GWK150J1001KLX000 from
Vishay) instead of the incandescent lamps.
● 6 incandescent lamps 230 V / 100 W for a line voltage of 500 to 690 V 3 AC, where
2 incandescent lamps must be connected in series in each supply phase.
Alternatively, use 3 resistors of 1 kΩ / 160 W each (e.g. GWK200J1001KLX000 from
Vishay) instead of the incandescent lamps.
● Various small components, such as lamp sockets, cable 1.5 mm
404
Production year and month
Character Year of manufacture
A
B
C
D
E
F
H
J
K
L
M
Character
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
Month of manufacture
1 ... 9 January to September
O
N November
D December
, etc.
2
Liquid-cooled chassis power units
Manual, (GH7), 11/2016, 6SL3097-4AM00-0BP7
October