UMG 512-PRO
www.janitza.com
74
12.5 Measured current
The device:
·Is designed for the connection of current trans-
formers with secondary currents of ../1 A and
../5 A.
·Does not measure DC currents.
·Has current measurement inputs which can be
loaded with 120 A for 1 second.
The factory-set current transformer ratio is 5/5 A
and must be adapted as needed for the current
transformers used.
Proceed as follows to connect the measured
current:
1.Short-circuit all current transformer outputs
except one.
2.Connect the measured current via the terminal
on the back of the device and secure it suffi-
ciently with the two screws.
3.Compare the current displayed on the device
with the applied input current.
·The currents must match after taking the current
transformer ratio into account.
·At the short-circuited current measurement
inputs, the device must indicate approx. 0 am-
peres.
Sign of phase shift angle (U/I):
·Positive (+) with capacitive load.
·Negative (-) with inductive load.
Fig. Phasor diagram
Current (displayed with a short
phasor)
Voltage (displayed with a long
phasor)
WARNING
Material damage due to disregard of the con-
nection instructions!
Voltages and currents outside the permissible
measuring range can destroy the device.
Comply with the measuring range specifica-
tions from the technical data.
Содержание UMG 512-Pro
Страница 23: ...www janitza com 23 UMG 512 PRO ...
Страница 27: ...www janitza com 27 UMG 512 PRO ...
Страница 47: ...www janitza com 47 UMG 512 PRO ...
Страница 89: ...www janitza com 89 UMG 512 PRO ...
Страница 96: ...UMG 512 PRO www janitza com 96 Fig IEC 61000 2 4 Watchdog parameters with traffic light principle report ...
Страница 97: ...www janitza com 97 UMG 512 PRO Fig IEC61000 2 4 PQ indicator parameters with traffic light principle snapshot ...
Страница 111: ...www janitza com 111 UMG 512 PRO 15 9 Dimensional drawings Fig View from the side Fig View from below ...
Страница 119: ...www janitza com 119 UMG 512 PRO ...