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UMG 104
Applying the measuring-circuit
current
The UMG104 is designed for the connection
of ../1A and ../5A current transformers.
Only alternating currents, not direct currents,
can be measured via the current measurement
inputs.
Short-circuit all current transformer outputs
except one. Compare the currents displayed
by the UMG104 with the applied current.
Taking into account the current transformer
transformation ratio, the current displayed by
the UMG104 must correspond to the input
current.
The UMG104 must display approximately
zero Amperes in the short-circuited current
measurement inputs.
The current transformer ratio is set to 5/5A in
the factory and if necessary must be adapted
to the current transformer used.
Phase sequence
Check the direction of the voltage rotating field
in the measured value display of the UMG104.
A “right” rotating field usually exists.
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