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Wiring instructions
ounting 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.
In the wiring scrupulously respect the wiring diagram; an error in connection unavoidably
leads to wrong measurements or damages to the device.
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●
ounting position does not affect in any way the proper working
Setting operations (intervention threshold, delay time, etc.) must be carried out with
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non-fed meter
Scrupulously respect the wiring diagram; an error in connection unavoidably leads to
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wrong measurements or damages to the device
The attainment of the full functionality for the differential protective system is related
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to the mounting mode. Therefore we suggest:
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To reduce as much as possible the distance between ring current transformer and diffe-
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rential relay
For connection, to use shielded or braided cables
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To avoid placing the ring current transformer-differential relay connection cables in
parallel with power conductors
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To avoid mounting ring current transformer and differential relay near sources of strong
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electromagnetic fields (big transformers)
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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
LE12569AA_E 10/20 - 01IM cod.RD4B21.B
(drawing D1)
(drawing D2)
(drawing D3)
65,6
Sealable front frame
45
44
Differential relays
D1
L 3
L 1
N
L 2
P E
D2
L 3
L 1
N
L 2
D3
X
Y
Z
3
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