WEG CFW11W G2 Series User Manual page 32

K1
Line
KPCR
220 Vac
external
The Input Rectifier of the CFW-11W G2 can be supplied via contactor or motorized circuit breaker (represented
by K1), and its command must be interlocked with the command of the KPCR pre-charge contactor.
on page 3-15 shows an example of a pre-charge circuit recommended for the CFW-11W G2 inverter, with the
simplified power and control diagrams. The digital relay output DO1 of the CC11 board must be configured with
the "Pre-Charge OK" function (P0275 = 25). This relay must be used to command the pre-charge contactor and
the main contactor (motorized circuit breaker). In addition, the duration of the pre-charge must be timed to protect
the components of the auxiliary circuit (resistors, contactor). This function is performed by a timing relay with on-
delay, represented in Figure 3.17 on page 3-15
L
line
R
11
Stop
12
11
S
off
12
CC11 (DO1)
13 13
KA1
S
on
14 14
A1 A1
KA1 +RC RT1
A2 A2
Figure 3.17: Example of a pre-charge activation circuit
by RT1.
Installation and Connection
Rectifier UP11 G2
DC+
DC-
15
13
KT1 KA2 KA2
16
18 14
43
KA1
44
XC1:22
XC1:23 XC1:22
21 21
KPCR KA2
22 22
A1 A1
KA2 +RC KPCR +RC
A2 A2
U
V Motor
W
43
44
A1
K1 +RC
A2
Figure 3.17
CFW-11W G2 | 3-15
3