Parameter: Start
•
Default setting (_:101) Start = with dropout
The Start parameter is used to define the criterion for starting the fault location. The following functions
can start the fault locator:
•
Overcurrent protection, phases or ground
•
Directional overcurrent protection, phases or ground
•
Instantaneous high-current tripping
Parameter Value Description
with dropout
The fault-location calculation starts with the dropout of one of the protec-
tion functions listed previously.
with operate indication
If one of the protection functions listed previously generates an operate
indication, calculation of the fault location starts.
As an alternative, the fault locator can be started using external binary input.
Parameter: Load compensation
•
Default setting (_:103) Load compensation = no
The Load compensation parameter can be used to correct measuring errors for 1-pole short circuits on
lines fed on both sides. This is the case for overhead lines without grounding cable or with unfavorable
grounding conditions of the towers, if high transition resistances can occur in the event of 1-pole short
circuits.
Parameter Value
Description
no
The load compensation is deactivated with this setting.
yes
The load compensation becomes effective with this setting.
Parameter: X per length unit
•
Default setting (_:113) X per length unit = 0.210 Ω/km
With the X per length unit parameter you set the reactance per unit length for the line to be protected.
You set the X per length unit parameter as a relative value in Ω/km or Ω/miles.
Parameter: Line length
•
Default setting (_:114) Line length = 60 km
With the Line length parameter, you can set the length of the line to be protected as unit of length in km
or miles.
Parameter: Line angle
•
Default setting (_:108) Line angle = 85.00°
Calculate the setting value for the parameter Line angle from the line constants for the line to be
protected as follows:
[folwinkl-050509-01.tif, 1, en_US]
where:
R
L
Resistance of the line to be protected
X
L
Reactance of the line to be protected
Protection and Automation Functions
6.46 Fault Locator
936 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
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