ZES ZIMMER LMG450, Руководство пользователя

Страница: 39 / 306

Z E S ZIMMER Electronic Systems GmbH Chapter 3
39
3.3.2 Measuring circuit for measuring efficiency of 3/1phase systems
L 1
G ro u p A G ro u p B
3 p h
f1
f2
1 p h
L 2
L 3 L’
N
N ’
Figure 4: Measuring circuit for measuring efficiency (3/1phase)
With group A you measure the three phase power, with group B the one phase power of the
system. The frequencies of group A and B can be different.
You can use this circuit also in the other direction, when you have a one phase source and a 3
phase load (e.g. solar panel pushing energy to the mains).
This circuit should be measured with wiring ‘3+1 Channels’. If your 3phase load is an delta
circuit and you have the option L45-O6 (star to delta conversion) implemented, you can also
use the wiring ‘3+1, U*I*->U
∆
I
∆
’ to determine all the values of the delta circuit.