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06.2005
16
Forming
How the serial
number is made up
Siemens AG
6SE7087-6CX86-2BA1
SIMOVERT MASTERDRIVES AFE
For units in the 400 V and 690 V voltage classes (cf. 9th digit of the
MLFB, letter E or H), the DC link capacitors must be formed again after
an idle period of more than 2 years.
For units in the 500 V voltage class (cf. 9th digit of the MLFB, letter F),
the DC link capacitors must be formed again after an idle period of
more than 1 year.
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
M
N
P
R
S
T
U
V
4
1 to 9
O
N
D
5 to 14
Forming time
6
in hours
5
4
3
2
1
1
2
3
Fig. 16-1
Forming time depending on the idle time of the AFE inverter
Operating Instructions
Meaning
Place of manufacture
2000
2001
2002
2003
2004
2005
2006
2007
January to September
October
November
December
Not relevant for forming
Off-circuit idle
time in years
4
5
Forming
16-1
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