Distance To Fault - Basler BE1-11g Instruction Manual

9424200994 Rev U
Retrieving Oscillographic Records
Oscillographic records can be downloaded through the Reports, Fault Reports screen in BESTCOMSPlus
(Figure 147). See Fault Reports earlier in this chapter. Oscillographic records can also be downloaded
through the web page interface. For more information, refer to the BESTnetPlus chapter.

Distance to Fault

The BE1-11g calculates distance to fault each time a fault record is triggered. Distance to fault is
calculated and displayed based on the power line parameters entered using BESTCOMSPlus or the
front-panel interface. Table 82 provides the power line operating settings.
Setting
Z1 Line Magnitude
Z1 Line Angle
Z0 Line Magnitude
Z0 Line Angle
Line Length
Line Length describes the power line parameters for which distance is to be computed over. The
parameters should be entered in units per line length with line length being the actual length of the power
line. Line length is entered as unit-less quantities and, therefore, can be entered in kilometers or miles.
Therefore, the distance results would be in whatever units the line length represented.
Using the Settings Explorer in BESTCOMSPlus, power line parameters can be entered on the System
Parameters, Power System screen. Settings are provided for Positive-Sequence Impedance, Zero-
Sequence Impedance, and Line Length. Refer to Figure 149.
Note that both Z1-MAG and Z0-MAG are scaled by 10 times to represent the entire length of the power
line. Since the units are in kilometers, the distance results would also be in kilometers.
Distance calculations are performed post-fault using vector data captured during the actual fault. Pre-fault
current vectors are captured three cycles prior to pickup. Fault voltage and current vectors are captured
two cycles after the trip command is issued. The two-cycle wait time allows line transients to settle to
provide results that are more accurate.
BE1-11g
Table 82. Power Line Operating Settings
Range
0.05 to 200 (5A CTs)
0.01 to 40 (1A CTs)
0 to 90
0.05 to 650 (5A CTs)
0.01 to 130 (1A CTs)
0 to 90
0.01 to 130
Figure 149. Power System Screen
Increment Unit of Measure
varies ohms
1 degrees
varies ohms
1 degrees
0.01 units
215
Default
24
80
8
80
100
Fault Reporting