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8 Configuring the Recorder
8-38 TESLA LITE User Manual D03283R01.10
8.14 Fault Locator Functions
Description
Fault Locator Functions produce distance-to-fault informations based on the
impedance measured on the specified voltage and current channels. The infor-
mation is logged and available through SCADA.
Input
Initiating Event: any External Input Channel or trigger detector from any other
channel or function.
Voltage Channels: must be Analog Input Channels monitoring voltage.
Current Channels: can be Analog Input Channels or Summation Channels
monitoring current.
The correct phases must be selected to achieve the desired results.
Calculation
When a user-configurable event occurs, the fault locator assesses the distance
to fault using the user-supplied line parameters. If one or more of the imped-
ances is consistent with a fault on the line, fault identification (e.g. B-G) and
location information is generated in the form of an event message.
Triggers
N/A
Recording
Fault Locator Functions are not recorded.
Number of
Channels
5 Fault Locator Functions are available.
Types
FLoc
Notes
When a Fault Locator Function is triggered, it writes a message into the Event
Log identifying the time, the Element, the faulted type (e.g. A-B, B-G...) and
the distance to fault.
The output of the Fault Locator Function is available through SCADA. It can-
not be metered or trended.
In most cases, the Initiating Event input should be delayed by 1.5 cy-
cles to obtain accurate fault location information. The delay can be
set in the source detector or a Logic Function can be used as an in-
termediary to insert the delay.