Forming - Siemens SIMOVERT MASTERDRIVES Operating Instructions Manual

10.98
10

Forming

How the serial
number is made up
3 AC 400 V
Forming
Siemens AG 6SE7087-6KP50
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: RFU-J60147512345)
Position Example
1 to 3 RFU-
4 J
K
L
M
5 1 to 9
O
N
D
6 to 15
The following applies for the above example:
Manufacture took place in June 1997.
During forming, the DC link of the unit is connected up via a rectifier, a
smoothing capacitor and a resistor.
As a result, the DC link capacitors receive a defined voltage and a
limited current, and the internal conditions necessary for the function of
the DC link capacitors are restored.
R
A C
Fig. 10-1 Forming circuit
Operating Instructions
Meaning
Place of manufacture
1997
1998
1999
2000
January to September
October
November
December
Not relevant for forming
C / L+
D / L-
DC link Inverter
PE3
Ground connection on
removed unit
Forming
M o to r
c o n n e c tio n
U2/T1
V2/T2
W2/T3
PE2
10-1