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UMG 604
Checking the energy measurement
Short-circuit all current transformer outputs
except for one and check the displayed power
outputs.
The UMG604 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 measuring-circuit
voltage and the measuring-circuit current.
If the power output 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 active energy back
into the network.
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