3�5�9�- MEASURING THREE-PHASE NETWORKS WITH A 3-WIRE CONNECTION AND TRANSFORMERS
WITH AN ARON CONNECTION, CVM-C10-ITF AND CVM-C10-MC MODELS�
Measurement system:
Power
Supply
V
L1
V
L2
V
L3
L1
L2
L3
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
OUTPUTS
Rc R2 R1
Tc T2 T1
S0- S0+ S0+
V
L1
V
L2
V
L3
a
b
A
B
a
b
A
B
S1
S2
P1
P2
S1
S2
P1
P2
LOAD
Figure 12: Three-Phase measuring with a 3-wire connection and transformers with an ARON connection, CVM-C10-ITF and CVM-
C10-MC and models�
(1)
Note:
Do not connect MC current transformers to ground.
CVM-C10-ITF
model:
The transformer secondary value must be 5A or 1A
CVM-C10-MC
model:
The MC transformer secondary value is set to 0.250 A (fixed value)
(1)
23
Instruction Manual
CVM-C10
