Circutor CVM-A1500 - Page 16

Measurement system:
Secondary winding of the current transformer: (MC3 type transformer)
Secondary winding of the neutral current transformer:
Power
Supply
VL1
L1
L2
L3
N V L3 L2 V L1 V
VL1 VL2 VL3
a
b
A B
a
b
A
B
3P1
2P1 1P1
3P2
2P2 1P2
Brown/Green
Grey/Pink
Green/White
Red/Blue
S1 S2
S1 S2
S1 S2
L1
P1 P2
L2
L3
P1 P2 P1 P2
S1 S2
LN
P1 P2
NV REF REF
N
S1
S2
P1
P2
POWER SUPPLY
VL2
VL3 N
VREF
NREF
a
b
A
B
VREF
NREF
LOAD
Figure 4: Three-phase measuring with a 4-wire connection (MC3 type transformer (/0�250))�
Note: The device can calculate the neutral current without having to measure it, option:
Calculated current .
The MC3 transformer secondary value is set to 0.250 A.
The transformer for measuring the LN neutral current cannot be MC type.
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CVM-A1000 - CVM-A1500
Instruction Manual