Woodward
Manual XRI1-ER
18
TD_XRI1-ER_12.03, Rev. C
5.1.1 Indication of measuring values and fault data
Indication in faultless condition
In normal operation the display always shows WW. After pressing the push button <SELECT/RESET> the dis-
play switches cyclically to the next measuring value. After the measuring values had been indicated the set-ting
parameters 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 actuating the
push button resets the relay and the display changes into normal operation (WW).
Indication after pickup/tripping
All of the faults detected by the relay are indicated on the front plate optically. Here not only the faults are indi-
cated but also the faulty phase(s) and the protection function in operation. At pickup the LEDs are flashing, after
tripping this changes to continuous light.
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. All operating data, which were measured at the moment of
tripping, can now be called one after another by pressing push button <SELECT/RESET>. If in this condition
setting parameters are to be indicated, push but-ton <ENTER> has to be pressed.
The graphic below shows again the difference between the different display modes.
Figure 5.2: Switching over of the display in dependence of the operating mode
