ZES ZIMMER LMG450, User Manual

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Installation LMG450
44
3.3.8 Measurements at middle and high voltage systems
LO
A
D
L 1
S 1 S 1 S 1 S 1 S 1 S 1
P 1 P 1 P 1 P 1 P 1 P 1
C T 1 C T 2 C T 3 V T 1 V T 2 V T 3
S 2 S 2 S 2 S 2 S 2 S 2
P 2 P 2 P 2 P 2 P 2 P 2
L 3
N
L 2
Figure 10: Measuring circuit for measuring in middle and high voltage systems
This is the measuring circuit for measuring in middle and high voltage systems. You can see
that there is no PE conductor. For very high currents and voltages, there are transformers in
each path implemented. The chosen wiring should be ‘3+1 Channels’.
When using voltage or current transformers please watch the applicable safety standards (e.g.
earthing, isolation, ...)!