Cable fault location
Pre-locate and pinpoint underground faults.
- Low- and medium-voltage cables
- Pulse echo pre-location
- Surge pinpointing
RangesMegger and Kehui systems, quoted project by project
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What it tells you
The order that works.
Step 1
Pre-locate
Pulse echo gives the distance along the cable.
Step 2
Trace the route
Follow where the cable really runs, and how deep.
Step 3
Pinpoint
Listen for the surge at the surface.
Step 4
Dig once
One hole, in the right place.
What we supply
Product groups
Tell us the job and we will recommend the model. No price lists here: the right instrument depends on the site.
Cable route tracing
Know exactly where a cable runs.
- Route and depth
- Cable identification
- Before any excavation
RangesMegger and Kehui route tracers
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Partial discharge diagnostics
Hear insulation breaking down early.
- Cables and joints
- Switchgear
- Condition-based maintenance
RangesFLIR Si2-PD acoustic camera · Megger · Kehui
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Transformer and breaker testing
Check the heart of the network.
- Winding resistance and ratio
- Breaker timing
- Commissioning and periodic tests
RangesMegger TTR and MTO testers, breaker analysers
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Low-resistance testing
Find poor joints and contacts.
- Busbar joints
- Breaker contacts
- Bonding and welds
RangesMegger DLRO range
Get a recommendationSome instruments need an export licence. We check before you order and tell you the timing.
Check a distance
Have a pulse-echo reading? Work out the distance.
Distance along the cable is half the velocity times the echo time. Set V/2 for your cable type.
Fault distanceExample values
µs
m/µs
m
m to the fault
0 m—
—
Distance = V/2 × t. Joints, slack loops and bends shift the spot, so the last metres are found by ear at the surface. Calibrate V/2 on a cable of known length.
How we help
Fewer trenches, sooner supply.
Choose
The right system
For the voltage, cable type and network you work on.
Train
Your fault crew
Pre-location, tracing and pinpointing, step by step.
Support
After the first fault
Calibration, repair and warranty through one contact.
Questions
Questions people ask
Every network is different. If your question is not here, just ask.
It gives a distance along the cable, not a spot on the ground. Joints, slack loops and bends shift the spot, which is why the last metres are found by pinpointing.
Fault location finds a cable that has failed. Partial discharge testing finds insulation that is starting to fail, so it fits planned maintenance.
It depends on the voltage, the cable types and how often you have faults. Tell us about the network and we will recommend one.