janitza UMG 806, User Manual And Technical Data

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UMG 806 www.janitza.com
7.5.2 Summation current measurement
For a summation current measurement via two
current transformers, fi rst set their total ratio on the
device (for setting the current transformer ratios,
see section „10.2.2 Confi guring the current trans-
former ratios“ on page 48).
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.
Set the device as follows:
Primary current: 1000 A + 1000 A =
2000 A
Secondary current: 5A
7.5.3 Ammeter
For a current measurement with an additional am-
meter, connect the ammeter in series to the UMG:
UMG
S
2
I
S
1
P
1
P
2
Supply 1 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
Consumer A Consumer B
Fig. Example for current measurement via a summation current
transformer.
Fig. Example circuit diagram with ammeter in series connection
UMG
S
2
I
S
1
Supply Consumer
A
(k)S
1
S
2
(l)
P
2
(L) (K)P
1
L1
N
PE
L3
L2
7 8 9 10
Fig. Connection example “Variant, residual current mea-
surement” via current transformer (Type A).
Load
7.6 Residual current measurement (RCM)
The measurement device is suitable as a residual
current monitoring device (RCM) for monitoring
alternating currents and pulsating direct currents.
Residual current transformers with a nominal
current as given in the section "Technical data" are
suitable for the meter’s residual current measure-
ment function.
Monitoring the residual currents of an electrical
system via the residual current input of the device
(terminal 9/10, I5), allows an alarm management
system to be set up using the GridVis
®
software.
This allows the system operator to be alerted be-
fore a protective device is triggered.
The measurements in medium and high voltage
networks are made via current and voltage trans-
formers.
INFORMATION
The meter is not an independent protective
device against electric shock!
0.1..40 mA
INFORMATION
Suitable for recording residual currents >
100 mA in combination with Janitza residual
current transformers.