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Typical external connection diagram for 1/2 case size
VCT4A, IO: MV-BI1, MV-BO1, MV-BIO1 x 2 plus RS485 and IRIG-B
Busbar
Phase A
Phase B
Phase C
Bus VT
CB
CT
Secondary
VT
Secondary
VT
Tertiary
from Bus VT
(*1) Above figure is an example.
Various CT and VT
connections are applicable.
DC supply
to Vs
VC
1
I
(Ia)
L1
2
3
I
(Ib)
IO#1
L2
4
5
I
(Ic)
L3
6
7
Ie
8
9
V
(Va)
L1
10
11
V
(Vb)
L2
12
13
V
(Vc)
L3
14
15
Ve
16
17
Vs
18
IO#1
T1
(+)
1
BI1
2
(-)
(+)
3
IO#1
BI2
(-)
4
(+)
5
BI3
(+)
6
BI4
(+)
7
BI5
(+)
8
BI6
(+)
9
BI7
(+)
10
BI8
(+)
11
BI9
(+)
12
BI10
(+)
13
BI11
(+)
14
BI12
(+)
15
BI13
(+)
16
BI14
(+)
17
BI15
(-) 18
T2
FG
17
GND
18
(+)
19
DC/DC
(-) 20
E (Case earth)
T2
1
BO1
CB trip
2
(*2)
command
3
(*2)Recommend to
BO2
4
assign by the
programmable BO
5
BO3
6
7
BO4
8
9
BO5
10
11
BO6
12
13
BO7
14
15
BO8
16
T1
19
Relay fail
Fail
20
C1
100BASE-TX
1000BASE-T
LAN
communication
C2
100BASE-TX
1000BASE-T
C3
IRIG-B000
A3
B3
SIG
A2
DISUSE
B2
DISUSE
A1
B1
GND
USB
Engineering
- 1068 -
6F2T0207 (0.01)
T3
(+)
17
BI1
(+)
18
BI2
(+)
19
BI3
IO#3
IO#3
(+)
20
BI4
(+)
21
BI5
(+)
22
BI6
(+)
23
BI7
(+)
24
BI8
(-) 26
T4
(+)
17
BI1
(+)
18
BI2
(+)
19
BI3
IO#2
(+)
20
BI4
(+)
21
BI5
(+)
22
BI6
(+)
23
BI7
(+)
24
BI8
IO#2
(-) 26
Clock signal
tools
GRE200 (5,6)
T3
1
BO1
2
3
BO2
4
5
BO3
6
7
BO4
8
9
BO5
10
11
BO6
12
13
BO7
14
15
BO8
16
T4
1
BO1
2
3
BO2
4
5
BO3
6
7
BO4
8
9
BO5
10
11
BO6
12
13
BO7
14
15
BO8
16
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