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2-12
Local Panel User Interface
Local Panel Operations
(cont.)
857-UM001A-EN-P – July 2009
•
Flt 2.86xIn – The fault current has been 2.86 per unit.
•
Load 0.99xIn – The average load current before the fault has
been 0.99 pu.
•
EDly 81% – The elapsed operation delay has been 81% of the
setting 0.60 s = 0.49 s. Any registered elapsed delay less than
100 % means that the stage has not tripped, because the fault
duration has been shorter than the delay setting.
•
SetGrp 1 – The setting group has been 1. This line can be
reached by pressing ENTER and several times the DOWN
button.
Setting Groups
Most of the protection functions of the relay have two setting groups.
These groups are useful for example when the network topology is
changed frequently. The active group can be changed by a digital input,
through remote communication or locally by using the local panel.
The active setting group of each protection function can be selected
separately. Figure 2.11 shows an example where the changing of the
I> setting group is handled with digital input one (SGrpDI). If the
digital input is TRUE, the active setting group is group two and
correspondingly, the active group is group one, if the digital input is
FALSE. If no digital input is selected (SGrpDI = -), the active group
can be selected by changing the value of the parameter SetGrp.
Figure 2.11 – Example of Protection Submenu with Setting Group
The changing of the setting parameters can be done easily. When the
desired submenu has been found (with the arrow keys), press the
ENTER key to select the submenu. Now the selected setting group is
indicated in the down-left corner of the display (See Figure 2.12).
Set1 is setting group one and Set2 is setting group two. When the
needed changes, to the selected setting group, have been done, press
the LEFT or the RIGHT key to select another group (the LEFT key
is used when the active setting group is 2 and the RIGHT key is used
when the active setting group is 1).
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