Siemens SINAMICS S120 - Page 802

Service and Support Booksize
14.2 Forming the DC link capacitors
Booksize Power Units
802 Manual, (GH2), 07/2016, 6SL3097-4AC00-0BP8
Date of manufacture
The date of manufacture can be determined as follows:
Table 14- 8 Production year and month
Character
Year of manufacture
Character
Month of manufacture
A
2010
1 ... 9
January to September
B 2011 O October
C
2012
N
November
D
2013
D
December
E
2014
F
2015
H
2016
J
2017
K
2018
L
2019
M
2020
The serial number is found on the rating plate.
Forming circuit
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.
The forming circuit is configured using incandescent lamps or alternatively, PTC resistors.
Components required
(recommendation)
● 1 fuse switch 3-phase 400 V / 10 A
● Cable 1.5 mm
2
● 3 PTC resistors 350 Ω / 35 W
(recommendation: PTC-35W PTC800620-350 Ohm, Michael Koch GmbH)
● 3 incandescent lamps 230 V / 100 W
● Various small components, such as lamp socket, etc.