3�5�11�- MEASURING TWO-PHASE NETWORKS WITH A 3-WIRE CONNECTION, CVM-C10-ITF-IN AND
CVM-C10-MC-IN MODELS�
Measurement system:
V
L1
V
L2
N
L1
L2
N
POWER SUPPLY
INPUTS
A
(+)
B
(-)
GND
RS485
S1
S2
S1
S2 S1
S2
L1
P1
P2
L2
L3
300V ~
Ph-N
Ph-Ph
520V ~
N
V
L3
L2
V
L1
V
P1
P2 P1
P2
I1 I2
V
L1
N
V
L2
a
b
A
B
a
b
A
B
S1
S2
P1
P2
S1
S2
P1
P2
S1
S2
P1
P2
A
OUTPUTS
Rc R2 R1
S1
S2
LN
P1
P2
Power
Supply
LOAD
Figure 14: Measuring Two-Phase Networks with a 3-wire connection, CVM-C10-ITF-IN and CVM-C10-MC-IN models�
(1)
Note:
Do not connect MC current transformers to ground.
CVM-C10-ITF-IN
model:
The transformer secondary value must be 5A or 1A
CVM-C10-MC-IN
model:
The MC transformer secondary value is set to 0.250 A (fixed value)
(1)
25
Instruction Manual
CVM-C10
