12. Connection Diagrams
3-PHASE 3-WIRE UNBALANCED LOAD
DIGITAL METERING SYSTEM
P1
S1
P1
S1
L N
AUX
SUPPLY
L1
L2
L3
N
L
O
A
D
2
5
8
3
4
6
7
9
11.4 Auxiliary Supply
The
should ideally be powered from a dedicated supply, however it may be powered
instrument
from the signal source, provided the source remains within the limits of the chosen auxiliary voltage.
11.5 Fusing
It is recommended that all voltage lines are tted with 1 amp HRC fuses.
11.6 Earth/Ground Connections
For safety reasons, CT secondary connections should be grounded in accordance with local
regulations.
86
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