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Les langues disponibles
10.2006
10
Forming
CAUTION
How the serial
number is made up
Siemens AG
6SE7087-7KN50
SIMOVERT MASTERDRIVES
If a unit has been non-operational for more than one year, the DC link
capacitors have to be newly formed. If this is not carried out, the unit
can be damaged when the line voltage is powered up.
If the unit was started-up within one year after having been
manufactured, the DC link capacitors do not have to be re-formed. The
date of manufacture of the unit can be read from the serial number.
(Example: A-J60147512345)
Digit
Example
1 and 2
A-
3
N
P
R
S
T
U
V
W
4
1 to 9
O
N
D
5 to 14
The following applies for the above example:
Manufacture took place in June 2001.
During forming, the DC link of the unit is connected up via a rectifier, a
smoothing capacitor and a resistor.
During forming a defined voltage and a limited current are applied to
the DC link capacitors and the internal conditions necessary for the
function of the DC link capacitors are restored again.
Operating Instructions
Meaning
Place of manufacture
2001
2002
2003
2004
2005
2006
2007
2008
January to September
October
November
December
Not relevant for forming
Forming
10-1
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