janitza UMG 605 PRO, User Manual And Technical Data

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UMG 605-PRO
18
6. 5. 1 Ammeter
If you wish to measure the current not only
with the UMG but rather with an ammeter
too, connect the ammeter to the UMG
in series.
6. 5. 2 Total current measurement
For a summation measurement via
two current transformers, first set their
total transformation ratio on the device.
For information on setting the current
transformer ratios, see “11. 2 Current
transformer ratio”.
Example:
The current is measured via two current
transformers. Both current transformers
have a transformation ratio of 1000 / 5 A.
The summation measurement is performed
using a 5+5 / 5 A total current transformer.
The device must then be set up 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. Circuit diagram with additional ammeter switched
in series
UMG
S
2
I
S
1
Einspeisung
Supply Verbraucher
Consumer
A
(k)S
1
S
2
(l)
P
2
(L) (K)P
1
Fig. Example for current measurement via a total current
transformer
Fig. Example of direct current measurement.
6. 5. 3 Direct measurement
Rated currents of up to 5 A can be measured
directly on the device. When doing so, note
that each current measurement input can be
continuously loaded with 6 A or loaded with
max. 100 A for 1 second.
The device does not have integrated
protection for current measurement.
Therefore, provide a 6 A line protection fuse
or automatic circuit breaker as protection
against overcurrent when installing.
UMG
S
2
I
S
1
Einspeisung
Supply
Verbraucher
Consumer
6. 5. 4 Current direction
You can correct the current direction directly
on the device or via the existing serial
interfaces for each phase individually.
If incorrectly connected, a subsequent
re-connection of the current transformer
is not required.