Active Front End (AFE)
vacon • 33
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
4
monitoring device might indicate a very low leakage resistance. The resistors must be connected so
that the capacitors are discharged when disconnecting from the input power. The wiring diagram of
an alternative discharging circuit can be seen in Figure 16. Figure 15 shows the default wiring of the
LCL filter. The discharging resistors should be 10 k
Ω
, 500 V and 2 W. Failure to ensure the
discharging of capacitors results in a risk of electric shock! Without the discharge resistors, the
capacitors take a very long time to discharge.
Figure 17 (for FI9 and FI10) and Figure 18 (for FI13) have a blue marking on the lead that has to be
removed from each capacitor if the discharge resistor is not to be used.
Warning!
If you do not allow a total discharge of the system before starting the modification, it is
likely that you will get an electric shock in spite of the fact the system is disconnected from the
power supply.
Figure 15. Wiring diagram of the default LCL filter
7101A_uk
