VAMP 259 - Page 180

3.15 Short circuit fault location
3 Supporting functions
Technical description
180
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VM259.EN007
Setting parameters of fault location Dist:
Parameter
Value
Unit
Default
Description
Trig
dI;
DI1 … DI20
-
-
Trigger mode (dI=
triggering based on
sudden increase of
phase current)
Line
reactance
0.010 … 10.000
Ohms/km
0.378
Line reactance of the
line. This is used only
to convert the fault
reactance to
kilometres.
dItrig
5 … 300
% Imode
20
Trig current (sudden
increase of phase
current)
Event
Disabled;
Enabled
-
Enabled
Event mask
Measured and recorded values of fault location Dist:
Parameter
Value
Unit
Description
Measured
values/
recorded
values
Distance
km
Distance to the fault
Xfault
ohm
Fault reactance
Date
-
Fault date
Time
-
Fault time
Time
ms
Fault time
Cntr
-
Number of faults
Pre
A
Pre-fault current (=load
current)
Fault
A
Current during the fault
Post
A
Post-fault current
Udrop
%Un
Voltage dip during the fault
Durati
s
Fault duration
Xfault
ohm
Fault reactance