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UMG 509
Checking the power measurement
Short-circuit all current transformer outputs except for
one and check the displayed power outputs.
The UMG 509 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 effective power amount is correct but the sign
of the power output is negative,
• S1(k) and S2(l) could be inverted at the current
transformer
• or they supply effective power back into
the network.
Checking the communication
The UMG 509 counts all received (RX), all transmitted
(TX) and all faulty data packages.
Ideally, the number of the error displayed in the Error
column is zero.
Reset:
You can reset the meters for the data package with
the 6 key.
The start time for the new counting process is reset.
In the Phasor diagram, the voltages are displayed
with long pointers and the currents with short
pointers.
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