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03.2004
6.1
Capacitor forming
Siemens AG
6SE7087-2CX87-2DA0
SIMOVERT MASTERDRIVES
The DC link capacitors must be re-formed if the converter has been
non-operational for more than one year. If the converter was started-up
within one year after having been shipped (serial number on the rating
plate), it is not necessary to re-form the DC link capacitors.
Forming is realized by switching-in a rectifier and resistor, which is
connected to the DC link. The converter supply must be
disconnected!
(circuit: refer to Fig. 6-1.)
The forming time is dependent on the time during which the converter
was not operational (see Fig. 6-2).
Position
Example
7
A
B
C
8 and 9
06
10 and 11
04
12 to 14
Table 6-2
Serial number structure: NW903160604095
Unità di frenatura / Braking Unit
Significance / Example
Manufacturing year:
2000
2001
2002
Manufacturing month: 06
Manufacturing day:
04
Not relevant for forming (serial
number)
Start-up
6-3
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