Siemens simovert masterdrives 6SE70 Serie Instructions De Service page 46

Forming
Components for the
forming circuit
(suggestion)
WARNING
Procedure
Derating curves
6-2
♦ Rectifier (A): SKD 62/16
♦ Resistor (R): 470 Ω, 100 W
♦ Capacitor (C): 22 nF, 1600 V
The unit has hazardous voltage levels up to 5 minutes after it has been
powered down due to the DC link capacitors. The unit or the DC link
terminals must not be worked on until at least after this delay time.
♦ Before you form the DC link capacitors, the unit must be removed or
the front and middle DC link bus module must be taken out.
♦ Connect the required components in accordance with the circuit
example.
♦ Energize the forming circuit. The duration of forming is dependent
on the idle time of the capacitor module.
Forming time
6
in hours
5
4
3
2
1
1 2 3
Fig. 6-2 Forming time as a function of the capacitor module idle time
Off-circuit idle
time in years
4 5
6SE7087-7NP87-2DD0
Operating Instructions
12.98
Siemens AG
SIMOVERT MASTERDRIVES