janitza UMG 512, Руководство по эксплуатации и технические данные

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UMG 512
Total current measurement
If the current measurement is done via two current
transformers, the overall transformation ratio
of the current transformers must be programmed into
the UMG 512.
Fig. Example, current measurement via a total
current transformer
UMG
S
2
I
S
1
P
1
P
2
Einspeisung 1
Supply 1 Einspeisung 2
Supply 2
1P
1
1P
2
(K)
(L)
(k)
(l)
1S
2
1S
1
1S
1
1S
2
2S
1
2S
2
2S
1
2S
2
(k)
(l)
(K)
(L)
2P
1
2P
2
Verbraucher A
Consumer A Verbraucher B
Consumer B
Example:
The current is measured via two current transformers.
Both current transformers have a transformation ratio
of 1000/5A. The summation measurement is performed
using a total current transformer 5+5/5A.
The UMG 512 must then be setup as follows:
Primary current: 1000A + 1000A = 2000A
Secondary current: 5A