TB MRU3-2 12.00 E
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5.7
Indication of measuring values
5.7.1
Measuring indication
In normal operation the following measuring values
can be displayed.
•
Voltages (LED L1, L2, L3 green)
•
In star connection all phase-to-neutral voltages
•
In delta connection all phase-to-phase voltages
•
Phase sequence (LED PS yellow)
5.7.2
Unit of the measuring values
displayed
The measuring values can optionally be shown in the
display as a multiple of the "sek" rated value (x ln) or
as primary current (A). According to this the units of the
display change as follows:
Indication as
Range
Unit
Sec. voltage
000V - 999V
V
Primary voltage .00V – 999V
1k00 – 9k99
10k0 – 99k0
100k – 999k
1M00 –-
3M00
V
kV
kV
kV
MV
Table 5.4: Units of the display
5.7.3
Indication in faultless condition
In normal operation the display always shows |SEG.
After pressing the pushbutton <SELECT/RESET> the
display switches cyclically to the next value. After the
measuring values had been indicated the setting pa-
rameters are displayed. Hereby the LEDs in the upper
section signalize which measured value is indicated,
the LEDs in the lower section signalize which setting
parameter is indicated on the display. Longer actuat-
ing the pushbutton resets the relay and the display
changes into normal operation (|SEG).
5.7.4
Indication after pickup / tripping
In tripped condition "TRIP" appears on the display and
the LEDs of the operating measuring data light up red
together with the LEDs of the tripping parameter (U0:
yellow). All operating data, which were measured at
the moment of tripping, can now be called one after
another by pressing pushbutton <SELECT/RESET>. (re-
fer to chapter 5.8). By pressing the <-> key, the fault
memory can be retrieved. If in this condition setting
parameters are to be indicated, pushbutton <ENTER>
has to be pressed.
The graphic below shows again the difference be-
tween the different display modes.
