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4. If you have already pre-located the fault, go near the pre-located fault location.
5. If necessary, set the height of the SVPs
[
Ü
“Product information”]
.
6. Plug in the SVPs to the CU.
7. Make sure that the SVPs are in good contact with the ground.
Sealed surfaces such as concrete or asphalt can have an insulating effect and impe-
de sheath fault location.
8. To improve the contact of the SVPs with the ground, wet the sponges with salt
water and place them on the SVPs.
9. Switch on the CU.
The header of the touchscreen shows that the SVPs are connected.
10. On the home screen, select the
Sheath fault location
method.
11. Note the displayed signal deflection.
If no signal deflection is visible, insert the SVPs into the ground a greater distance
apart.
12. To change the settings, call up the method settings by tapping .
13. Using the SVPs, move along the cable route towards the fault.
The voltage increases in the direction of the fault, slowly at first and then sharply
in the direct vicinity of the fault. Right above the fault, the polarity of the voltage
changes. If the SVPs are inserted symmetrically above the fault, the deflection of
the bar graph is zero.
14. Once you have located the fault, mark the position.
15. Switch the devices off.
protrac® pin-pointing system
822-186-4
Performing sheath fault location
