Siemens Sinamics S120 Manual page 826

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14.3 Forming the DC link capacitors
Date of manufacture
The date of manufacture can be determined as follows:
Table 14- 13 Production year and month
Character
S
T
U
V
W
X
A
B
C
D
E
F
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
● 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.
Danger to life through electric shock due to the residual charge of the DC-link capacitors
Due to the DC-link capacitors, a hazardous voltage is present in the DC link for up to five
minutes after the power supply has been switched off.
Contact with live parts can result in death or serious injury.
• Do not open the protective cover of the DC link until five minutes have elapsed.
• Check that the cabinet is de-energized.
826
Year of manufacture
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2
DANGER
Character
1 to 9
O
N
D
Manual, (GH2), 04/2014, 6SL3097-4AC00-0BP6
Month of manufacture
January to September
October
November
December
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