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Wiring instructions
Mounting of this equipment must be carried out just by skilled personnel.
Please make sure that the data on the label (extra supply voltage, frequency, etc.) correspond
to the network on which the meter must be connected.
Mounting position does not affect in any way the proper working
Scrupulously respect the wiring diagram; an error in connection unavoidably leads to
wrong measurements or damages to the device
The attainment of the full functionality for the differential protective system is related
to the mounting mode. Therefore we suggest:
To reduce as much as possible the distance between ring current transformer and diffe-
rential relay
For connection, to use shielded or braided cables
To avoid placing the ring current transformer-differential relay connection cables in
parallel with power conductors
To avoid mounting ring current transformer and differential relay near sources of strong
electromagnetic fields (big transformers)
Just the active conductors cross the ring current transformer
Using a shielded cable, the armor must be grounded as per
The conductors must be placed in the middle of the ring current transformer
Dimensions
89,5
70
LE12570AA_E 10/20 - 01IM cod.RDD421..
(drawing D1)
(drawing D2)
(drawing D3)
65,6
45
44
D1
L 3
L 1
N
L 2
P E
D2
L 3
L 1
N
L 2
D3
X
Y
Z
Delta D4-h
3
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