ZES ZIMMER LMG450, User Manual

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Z E S ZIMMER Electronic Systems GmbH Chapter 3
41
3.3.4 Aron wiring
LO
A
D
L 1
L 3
L 2
S 1 S 1 S 1 S 1
P 1
P 1
P 1 P 1
C T 1 C T 2 V T 1 V T 2
S 2 S 2 S 2 S 2
P 2
P 2 P 2
P 2
Figure 6: Measuring circuit with current and voltage transformers in Aron wiring
This wiring is for measuring the power of a three phase system without a neutral conductor.
This circuit should be measured with wiring ‘2+2 Channels’. Here current and voltage are
measured with transformers to enlarge the ranges, e. g. for measuring in middle or high voltage
systems with also high currents. The both free channels could be used to measure another three
phase system: refer „3.3.5 Measuring circuit for measuring efficiency of 3/3phase systems“.
When using voltage or current transformers please watch the applicable safety standards (e.g.
earthing, isolation, ...)!