3.5.8.- MEASURING THREE-PHASE NETWORKS WITH A 3-WIRE CONNECTION AND
TRANSFORMERS WITH AN ARON CONNECTION, CVM-C10-ITF AND CVM-C10-MC MO-
DELS.
Measurement system:
Power
Supply
V
L1 VL2
VL3
L1
L2
L3
POWER SUPPLY
INPUTS
A(+) B(-)
GND
RS485
S1 S2
S1 S2
S1 S2
L1
P1 P2
L2
L3
300V
~
Ph-NPh-Ph
520V
~
NV
L3L2
V
L1
V
P1 P2
P1 P2
I1 I2
OUTPUTS
Rc R2 R1 Tc T2 T1
S0-
S0+ S0+
VL1 VL2 VL3
a
b
A B
a
b
A B
S1
S2
P1
P2
S1 S2
P1
P2
LOAD
Figure 11: Three-Phase measuring with a 3-wire connection and transformers with an ARON connection, CVM-C10-
ITF and CVM-C10-MC and models.
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 (xed value)
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