32
Voltage
In the voltage display you should check the
L-N and/or L-L voltages. If one or several
voltages are missing here, there is possibly a
wiring error.
If the displayed values do not correspond to
the actual voltages, check the voltage trans-
former setting.
Phase sequence
If all the voltage circuits have been connected,
the UMG507 displays the phase sequence.
If all the segments in the display run in a
clockwise direction, a right-hand rotating field
exists. If the segments in the display run in an
anti-clockwise direction, a left-hand rotating
field exists.
Checking the Measured Values
L1
Hz
L1
Hz
L1
L3
L2
V
V
V
If the segments in the display are at a stand-
still there is not rotating field. In this case the
voltage circuits have probably not all been
properly connected.
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