janitza UMG 509, Operation Manual And Technical Data

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104
UMG 509
Procedure in the event of faults
Possible fault Cause Remedy
No display External fuse for the power supply voltage has
tripped. Replace fuse.
No current display Measured voltage
is not connected. Connect the measured voltage.
Measurement current is not connected. Connect measuring-circuit current.
Current displayed is too large or too
small. Current measurement in the wrong phase. Check connection and correct if necessary.
Current transformer factor is incorrectly
programmed. Read out and program the CT ratio at the current
transformer.
The current peak value at the measurement input
was exceeded by harmonic components. Install current transformer with a larger CT ratio.
The current at the measurement input fell short
of. Install current transformer with a smaller current
transformer ratio.
Voltage displayed is too large or too
small. Measurement in the wrong phase. Check connection and correct if necessary.
Voltage transformer incorrectly programmed. Read out and program the voltage transformer
ratio at the voltage transformer.
Voltage displayed is too small. Measurement range exceeded. Use voltage transformers.
The peak voltage value at the measurement input
has been exceeded by the harmonics. Please note! Ensure the measurement inputs are
not overloaded.
Phase shift ind/cap. A current path is assigned to the wrong voltage
circuit. Check connection and correct if necessary.
Effective power, consumption/supply
reversed. At least one current transformer connection
is mixed up/reversed. Check connection and correct if necessary.
A current path is assigned to the wrong voltage
circuit. Check connection and correct if necessary.