UMG 509-PRO
108
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16. Procedure in the event of a malfunction
Failure mode
Cause
Remedy
No display
External fuse for the supply voltage
has tripped.
Replace fuse.
No current display.
No measured voltage connected.
Connect measured voltage.
No measured current connected.
Connect measured current.
Displayed current istoo
great or too small.
Current measurement on the wrong
phase.
Check connection and correct if
necessary.
Current transformer factor incorrectly
programmed.
Read and program the current trans-
former ratio on the current trans-
former.
The peak current value at the mea-
suring input was exceeded by current
harmonics.
Install current transformers with a
higher current transformer ratio.
The current at the measuring input is
too low.
Install current transformers with a
lower current transformer ratio.
Displayed voltage is too
low or too high.
Measurement on the wrong phase.
Check connection and correct if
necessary.
Voltage transformer programmed
incorrectly.
Read the voltage transformer ratio
on the voltage transformer and
program.
Displayed voltageis too
low.
Overrange.
Use a voltage transformer.
The voltage peak value at the mea-
suring input was exceeded due to
harmonics current.
Attention!
Make sure that the mea-
suring inputs are not overloaded.
Phase shift, ind./cap.
Current path is assigned to the wrong
voltage circuit.
Check connection and correct if
necessary.
Active power con-
sumed / delivered is
interchanged.
At least one current transformer con-
nection is reversed.
Check connection and correct if
necessary.
A current path is assigned to the
wrong voltage circuit.
Check connection and correct if
necessary.
