Fault Locator
Overview of Functions
The Fault locator function serves for measuring the fault distance in the event of a short circuit.
Quick determination of fault location and the associated rapid troubleshooting increase the availability of the
line for the power transmission in the electrical power system. Determining the fault location is based on the
loop-impedance calculation of short-circuited measuring loops.
Structure of the Function
The Fault locator function can be used in protection function groups with 3-phase current and voltage meas-
urement.
[dwstbafo-090812-01.tif, 1, en_US]
Figure 6-321 Structure/Embedding of the Function
The recording of phase currents and voltages is a prerequisite for calculation of fault locations. The Fault
locator function contains all necessary control parameters.
The fault location is calculated based on the line parameter. The fault-location calculation starts with
operate indication or for dropout of the short-circuit protection.
The following functions can start the fault locator:
•
Overcurrent protection, phases or ground
•
Directional overcurrent protection, phases or ground
•
Instantaneous high-current tripping
NOTE
The Fault locator function does not work with all possible current and voltage transformer connection
types. An error message is displayed in DIGSI 5 if the Fault locator function cannot work with the set
connection types. In this case check the current and voltage transformer connection type. You will find the
current transformer connection or voltage transformer connection settings in DIGSI 5
under Power-system data → Measuring point I-3ph or Power-system data → Measuring point V-3ph.
The Fault locator function only works with the following current and voltage transformer connection types
(see parameter value).
Parameter
Parameter Value
CT connection 3-phase + IN-separate
3-phase + IN
3-phase
VT connection 3 ph-to-gnd volt. + VN
3 ph-to-gnd voltages
6.46
6.46.1
6.46.2
Protection and Automation Functions
6.46 Fault Locator
SIPROTEC 5, Overcurrent Protection, Manual 933
C53000-G5040-C017-8, Edition 07.2017
To Next Page
Loading...
