socomec DIRIS Ap Notice D'utilisation page 35

NB :
The solution using one CT, with the
3rd phase current calculated via vec-
toral summation, results in an 0.5%
reduction in phase accuracy.
NB :
The solution with 2 CTs with the 2nd
and 3rd phase current calculated via
vectoral summation, results in an
0.5% reduction in phase accuracy.
SOCOMEC - Ref. : 875 510A
BALANCED THREE-PHASE NETWORK (4 LB)
I1 I2 I3
S1 S2 S1 S2 S1 S2 V1 V2 V3 VN
S1
P1
UNBALANCED THREE-PHASE NETWORK (3 LNB)
I1 I2 I3
S1 S2 S1 S2 S1 S2 V1 V2 V3 VN
S1
P1
S1
P1
S1
P1
I1 I2 I3
S1 S2 S1 S2 S1 S2 V1 V2 V3 VN
S1
P1
S1
P1
I1 I2
S1 S2 S1 S2 S1 S2
AUX
110 to 440 V AC
120 to 350 V DC
FUSES
0,5 A
S1
L1 ( R )
P1
L2 ( S )
L3 ( T )
N
I1 I2
AUX S1 S2 S1 S2 S1 S2
110 to 440 V AC
120 to 350 V DC
FUSES
0,5 A
S1
L1 ( R )
P1
S1
L2 ( S )
P1
S1
L3 ( T )
P1
I1 I2
AUX S1 S2 S1 S2 S1 S2
110 to 440 V AC
120 to 350 V DC
FUSES
0,5 A
S1
L1 ( R )
P1
L2 ( S )
S1
L3 ( T )
P1
I3
V1 V2 V3 VN AUX
a a a a a a
110 to 440 V AC
120 to 350 V DC
A A A A A A
L1 ( R )
L2 ( S )
L3 ( T )
N
I3
V1 V2 V3 VN AUX
a a a
110 to 440 V AC
120 to 350 V DC
A A A
L1 ( R )
L2 ( S )
L3 ( T )
I3
V1 V2 V3 VN AUX
a a a
110 to 440 V AC
120 to 350 V DC
A A A
L1 ( R )
L2 ( S )
L3 ( T )
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