janitza UMG 103-CBM - Ammeter; Current Direction; Summation Current Measurement

UMG 103-CBM www.janitza.com
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INFORMATION
The device only allows the setting of one current
transformer ratio for all phases!
You can configure current transformer ratios
conveniently via
· The GridVis
®
software.
UMG
S2
I
S
1
P1
P2
Einspeisung 1
Supply 1
Einspeisung 2
Supply 2
1P1
1P2
(K)
(L)
(k)
(l)
1S
2
1S1
1S1 1S2 2S1 2S2
2S1
2S2
(k)
(l)
(K)
(L)
2P
1
2P2
Verbraucher A
Consumer A
Verbraucher B
Consumer B
7.5.2 Ammeter
If you want to measure the current not only with
the UMG, but also with an ammeter, connect the
ammeter to the UMG in series.
UMG
S2
I
S
1
Einspeisung
Supply
Verbraucher
Consumer
A
(k)S
1 S2(l)
P
2(L)(K)P1
Fig. Circuit diagram with additional ammeter con-
nected in series
7.5.3 Current direction
You can correct the current direction for each
phase individually via the serial interfaces pro-
vided. This means that in the case of incorrect
connection, no subsequent reconnection of the
current transformers is necessary.
7.5.4 Summation current measurement
For a summation current measurement via two
current transformers, first set their total ratio in the
device. This is done in the GridVis software
Example:
The current is measured via two current trans-
formers. Both current transformers have a ratio of
1000/5 A. The summation measurement is car-
ried out with a summation current transformer of
5+5/5 A.
The device must then be adjusted as follows:
Primary current: 1000 A + 1000 A = 2000 A
Secondary current: 5 A
INFORMATION
The red LED blinks if the measuring range is ex-
ceeded, see chapter „4.2 LED display patterns“
on page 21