Operation
29
Proceed as follows to perform fault prelocation:
Step Description
1
In the main menu, call up the menu item
(standard accuracy mode) or
(high accuracy mode) depending on the cable and fault characteristics.
2
Set the voltage, the cable length and the type of cable (see previous page).
3
Start the fault location via the menu item
.
4
Press the “HV ON” push-button
.
Result:
The device runs through the automatic fault location algorithm. Readings are
taken from the near and far ends of the cable, respectively, with both voltage
polarities and the fault distance determined, using the voltage drop method.
If the “HV OFF” push-button
is pressed during the automatic
prelocation, operation may not be stopped and high voltage may not be
turned off until the current sub-step is finished. Accordingly, in
emergencies the emergency off button must always be used, as the
high voltage is then immediately switched off and the cable discharged.
On completion of the measurement, the high voltage is switched off and the
cable discharged.
5
If the cable under test
has no mixed sections
…
If the cable under test
has mixed sections
…
The fault distance that has
been determined can be read
in the display.
Enter length (in m), cross section (in mm
2
) and
conductor material (Al or Cu) of the first
(nearest) section.
If the measured resistance values do indicate
that the fault position is beyond this section, the
following sections have to be specified the same
way one after another.
The <<< and >>> buttons can be used to
browse, check and correct the entered data.
As soon as the entered section has been
identified as the faulty section, the fault distance
can be read in the display.
Procedure
