4
vacon • 32 Active Front End (AFE)
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
NOTE! The minimum fibre cable bending radius is 50 mm.
NOTE! Terminals
X2 and X3 can be in use simultaneously. However, if the +24 V supply from the
control I/O terminals (e.g. from board OPT-A1) is used, this terminal must be protected with a diode.
4.7.2 LCL wiring diagram
The LCL filter contains a choke on the mains side, capacitors and a choke on the AFE side, Figure 14.
The LCL also includes capacitors connected against ground potential. There are resistors connected
across the capacitors for discharging them when the LCL filter is disconnected from the input
power. The discharging resistors are 10 MΩ, 500 V and 0.5 W.
Figure 14. VACON
®
LCL filter wiring diagram
4.7.2.1
Removing discharging resistors
If the LCL filter is used in a network fitted with an earth fault protection relay, these discharging
resistors should be removed. If the discharging resistors are not removed, the earth fault
Other terminals on adapter board
X1 Control board connection
X2
Supply voltage 24 V
in
(from power unit ASIC)
X3
Supply voltage 24 V
in
(customer);
•Max. current 1A
• Terminal #1: +
• Terminal #2: –
LCL FILTER
U2
V2
W2
-R1 -R4
-L1
-L2.1
-L2.2
-L2.3
U1
V1
W1
U
V
W
-C1
-C2
-C3
L1
L2
L3
-C1.1 -C1.2
-C2.2-C2.1
-C3.1 -C3.2
-C4.1
-C4.2
-C5.1 -C5.2
-C6.1
-C6.2
-R2 -R5
-R3 -R6
11181.emf
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