janitza UMG 604-PRO, User Manual And Technical Data

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UMG 604-PRO
34
9. 5 Applying the measured current
The device:
• is intended for connecting current
transformers with secondary currents of
../1 A and ../5 A.
• does not measure DC.
• has current measurement inputs that are
continuously loaded with 6 A or loaded
with 100 A for 1 second.
Proceed as follows to connect measured
current to the device:
1. Connect the currents to be measured to
voltage measurement inputs I1 to I4.
2. Short circuit all current transformer outputs
except for one.
3. Compare the currents displayed by the
device with the applied current.
• Bearing in mind the current transformer
conversion ratio, the current displayed by
the device must correspond to the current
input.
• The device must display approx. zero
amperes in the short circuited current
measurement inputs.
The current transformer ratio is factory-set
to 5/5A and must be adapted to the current
transformer used if necessary.
9. 6 Checking the power measurement
Short-circuit all current transformer outputs
except for one and check the displayed
power outputs.
The device may only display one power
output in the phase with a non-short-circuited
current transformer input. If this is not the
case, check the connection of the measured
voltage and the measuring-circuit current.
If the power figure is correct but the power
sign is negative, connections S1(k) and S2(l)
on the current transformer may be mixed up
or they are supplying active energy back to
the network.