T-506 Pinpointer

The T-506 is used together with a high voltage surge generator, to pinpoint high resistance and flashover faults on power cables. It utilises an Application (App) running on an Android device, connected wirelessly to a hand-held sensor. The sensor detects magnetic and audio signals emanating from the faulted cable. Although most Android tablets can be used, a pre-programmed, ruggedised device, with a hands-free neck strap, is available from Kehui.


The Tablet has two modes; the Operator mode provides an intuitive indication of the position of the cable, with an arrow showing the position of the fault relative to the user’s position. The Waveform Analysis mode allows the user to diagnose the fault position from the magnetic field and audio waveforms.

Operator mode


Waveform Analysis mode

The equipment is complemented by a pair of noise-cancelling earphones to assist the user in hearing the sound of the discharge at the fault position in a noisy environment.


Fault location fixed point accuracy ≤0.2m
Detector dynamic range Sound channel >110dB
Magnetic field channel >110dB
Operating frequency range Sound channel 100Hz—1500Hz
Magnetic field channel 160Hz—50000Hz
Sound channel filter No filter 100Hz –1500Hz
Low pass filter 100Hz – 400Hz
Band pass filter 150Hz – 600Hz
High pass filter 200Hz – 1500Hz
Battery Detector Lithium battery 2200mAh
Tablet PC Lithium polymer battery 6000mAh
Charging Detector Input: 100-240V – 50/60Hz

Output: 8.4V/1A

Class II

Tablet PC Input: 100-240V – 50/60Hz

Output: 5.0V/2A

On-site continuous working hours Typically 12 hours


Detector 230mm x 160mm (diameter x height excluding handle)
Tablet 216 x 128 x 24mm (excluding harness)


Pin-pointer 2.0kg
Tablet 1.1kg (including harness)
Working temperature -10 to 50oC
Working humidity: 40oC (20-90) % RH
Storage temperature: -20 to 50oC
Protection class: IP65
European Low Voltage Directives Compliance

T-506 Datasheet

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