socomec DIRIS Am 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.
Recommendations:
Each CT's secondary winding must
be short-circuited when disconnec-
ting the Diris Am. This can be done
automatically using one of Socomec's
catalogue products: the PTI. Please
contact us for further information.
36
UNBALANCED THREE-PHASE NETWORK (3 LNB)
I1 I2 I3
S1 S2 S1 S2 S1 S2 V1 V2 V3 VN
S1
P1
S1
P1
BALANCED THREE-PHASE NETWORK (3 LB)
I1 I2 I3
S1 S2 S1 S2 S1 S2 V1 V2 V3 VN
S1
P1
TWO-PHASE NETWORK (2 LB)
I1 I2 I3
S1 S2 S1 S2 S1 S2 V1 V2 V3 VN
S1
P1
I1
S1 S2 S1 S2 S1 S2
AUX
110 to 440 V AC
120 to 350 V DC
FUSES
2 A
S1
L1 ( R )
P1
S1
L2 ( S )
P1
L3 ( T )
I1
S1 S2 S1 S2 S1 S2
AUX
110 to 440 V AC
120 to 350 V DC
FUSES
2 A
S1
L1 ( R )
P1
L2 ( S )
L3 ( T )
SINGLE-PHASE NETWORK (1 LB)
I1
AUX S1 S2 S1 S2 S1 S2
110 to 440 V AC
120 to 350 V DC
FUSES
2 A
S1
L1 ( R )
P1
L2 ( S )
I2 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 )
I2 I3
V1 V2 V3 VN AUX
110 to 440 V AC
120 to 350 V DC
FUSES
0,5 A
L1 ( R )
L2 ( S )
L3 ( T )
N
I2 I3
V1 V2 V3 VN AUX
110 to 440 V AC
120 to 350 V DC
FUSES
2 A
L1 ( R )
N
SOCOMEC - Ref. : 875 508A