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UMG 96-PA
/
UMG 96-PA
MID
23
7.5.1
Current direction
You can correct the current direction for each
phase individually using the existing serial
interfaces. So, there is no need to subsequently
reconnect the current transformer in the event of
an improper connection.
7.5.2
Summation current measurement
For a summation current measurement via
two current transformers, first set their total
transformation ratio on the device. A description
of how to set the current transformer ratios is
provided in chapter 12.3.2 on page 36.
Example:
The current measurement occurs via two current
transformers. Both current transformers have a
transformation ratio of 1000/5 A. The summation
measurement is performed with a summation
current transformer 5+5/5 A.
The device must then be set as follows:
Primary current:
1000 A + 1000 A = 2000 A
Secondary current: 5 A
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
Fig.
Example for
the current
measurement
vFa a summatFon
current transformer
7.5.3
Ammeter
If you want to measure the current not only with
the UMG, but also with an ammeter as well,
switch the ammeter in series to the UMG.
UMG
S
2
I
S
1
Einspeisung
Supply
Verbraucher
Consumer
A
(k)S
1
S
2
(l)
P
2
(L)
(K)P
1
Fig.
CFrcuFt dFairam
wFth addFtFonal
ammeter
swFtched Fn serFes
Fig.
Current measurement vFa
the current transformer
Fn the three-phase
4-conductor system
Fig.
Current measurement Fn the
sFnile-phase 3-conductor
system
Fig.
Current measurement vFa
2 current transformers Fn the
three-phase 4-conductor
system
L1
N
Fig.
Current measurement Fn the
sFnile-phase 2-conductor
system
NOTE
If the measuring range is exceeded, the device
display shows the warning notice
Measuring
range exceeded and specifies the current
and voltage path.
7.5.4
Current measurement connection versions
Load
Load
Load
Load
