GE RPV311, Technical Manual

Page: 179 / 295

RPV311 Chapter 12
– RPV Tools
RPV311-TM-EN-7 179
E Location of the fault of terminals A and B.
In order to locate a fault, select a power line configuration and then, select one
record of terminal A and the related record of terminal B is automatically selected.
The user can manually exchange the terminal B record.
Click on the
< L
OCATE
> button to run the fault location algorithm. If it is possible to
locate the fault automatically, the result is the distance between both terminals A
and B and the estimated fault location, and a "
Success fault location " message is
declared.
If some problem occurs in the fault location, a "
Fault not be locate " message will
appear. Possibly the selected records are not about the same event or the wavefront
is less than the threshold set. In this case change the threshold levels of the location
and click the
<
L
OCATE
>
button again.
If the fault is still not located, use the graphical tool to identify the times of the wave
fronts in the two terminals manually.
To use the graphical tool, click on the
< V
IEWER
> button. Each terminal of the
transmission line has a record of traveling waves, which are simultaneously
displayed in the graphics window. In each record it is necessary to position the cursor
at the exact moment of the beginning of the wave front, as shown in
Figure 80 .
Figure 80: Graphical tool of Fault Locator interface
To move the cursor with the keyboard, first click on the corresponding graph with the
left mouse button and navigate the graph, as follows:
Right mouse button position the cursor on the local clicked;
<
LEFT
/
RIGHT ARROW
> position the cursor each 1 us;