Vacon NX Active Front End User Manual page 33

Active Front End (AFE)
1L1
1L2
1L3
PE
BREAKER
-RF4
-TB1
DC+
DC_BUS
DC-
Figure 18. Wiring diagram of LCL and AFE circuit when used in IT network, or when AFE of other
manufacturer is connected to same transformer secondary supply
4.7.2.2 Removing HF capacitors
If a PWM modulated rectifier from another manufacturer is connected to the same input transform-
er, the HF capacitor must be removed, because the HF capacitors will be filtering the high frequen-
cy disturbances from another manufacturer's active front ends. It is recommended to always use
own transformers if more than one manufacturer's AFEs are used.
Figure 19 (for FI9 and FI10) and Figure 20 (for FI13) have a red marking on the lead that has to be
removed from each capacitor if the HF capacitors are not to be used. Removing the lead
disconnects the capacitors from ground potential.
24-hour support +358 (0)201 212 575 • Email: vacon@vacon.com
1 3 5
-FC1
MAINS
I> I> I>
I>> I>> I>>
2 4 6
1 1 1
-FC2.1
-FC2.2
GND/PE
-FC2.3
2 2 2
SC FUSES
X52
L1 L2 L3 PE
1
2
3
X52
4
X53
X3
+
X4
-
X1 X8
X51
M
2
1
3
U V W 4
GND/PE
U PE V PE
B+ B- B+
1 1 1
-FC3.1 -FC3.3
-FC3.2 -FC3.4
2 2 2
GND/PE GND/PE
W PE
X3
X70
X10
AP
OF
H1..H7
B- B+ B-
1 1 1
-FC3.5
-FC3.6
2 2 2
vacon • 31
21 61 71
-FC1
22 62 72
-X1.1
1 2 3
x1 x1 x1
-R1 -R2 -R3
x2 x2 x2
-X1.1
4 5 6
GND/PE
1 1
-FCD1 -FCD2
8A 8A
2 2
7102.emf
4