Checking the total power outputs
If all voltages, currents and outputs for the respective
outer conductors are correctly displayed, the total
power outputs measured by the UMG 96RM must also
be correct. To confirm this, the total outputs measured
by the UMG 96RM should be compared with the work
of the active and reactive power meters located
in the incoming supply.
Checking the measurement
If all voltage and current inputs are correctly connected,
the individual and cumulative outputs are computed
and displayed correctly.
Checking the individual outputs
In case that a current transformer is assigned
to the wrong outer conductor, the corresponding power
output will be measured and indicated incorrectly.
The assignment of the outer conductor
and the UMG 96RM-E current transformer is correct,
if no voltage is measured between the outer conductor
and the corresponding current transformer (primary).
In order to ensure that an outer conductor at the voltage
measurement input is assigned to the correct current
transformer, the respective current transformer can
be short-circuited on the secondary side. The apparent
power displayed by the UMG 96RM-E must then
be approx. zero in this phase.
If the apparent power is correctly displayed but the
active power is displayed with a „-“ sign, then the current
transformer terminals are reversed or power is supplied
to the power supply company.
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