Process steps & methods: Tracing and pin-pointing
As precise as pre-location is, it will never be able to recognise the deviations of a cable route in the ground. These can only be detected by precise pin-pointing.
is the most common method used to determine the precise location of high-resistive faults and breakdown faults. High-voltage pulses create electromagnetic pulses on the way to the fault location and generate a breakdown with an audible bang.
Step voltage method
to determine the precise location of cable sheath faults. A voltage drop is generated at the fault which can be located using earth spikes and a receiver.
to precisely determine the cable route. Precise cable tracing is essential, particularly with unknown or imprecise cable routes, and saves both time and money.
Twist method or minimum distortion method
used when pin-pointing short-circuits depending on the cable type. In this process, the disturbance in the otherwise homogeneous magnetic field that is caused by the fault is measured and located precisely.