Skip to main content

Cable fault location, testing, and diagnostics

Empower your decision making with our innovative cable fault solutions.

Reliable cable infrastructure plays a critical role in today’s landscape. Megger plays a critical role in helping you avoid service interruptions. That’s because Megger’s cable testers find faults other devices can’t detect — whether it’s damage to the cable, workmanship failures, or cable deterioration — helping you reduce costs and maximise the security of your supply. Our experience in testing, knowledge of cables, and cable test methods fuel our designs, resulting in the most efficient solutions and best-in-class performance.

Ensure safe cable testing and fault finding

Megger’s cable testing systems are designed to support safe fault location workflows, ensuring personnel and infrastructure remain protected. Identify faults accurately before excavation or repair, to reduce risk and avoid unnecessary exposure. 

Restore service fast and prevent repeat failures

Restore service fast and prevent repeat failures Quickly locate and diagnose cable faults to restore service faster and reduce disruption. Megger's cable fault detection solutions help prevent repeat failures, minimise downtime, and ensure reliable cable network performance.

Make informed maintenance decisions with data

Make informed maintenance decisions with data Megger's cable fault testing and diagnostic tools provide clear, accurate data to help engineers understand cable condition, identify issues confidently, and prioritise maintenance. Improve decision-making and optimise long-term asset performance.

Frequently asked questions

We provide a comprehensive range of products tailored to every stage of fault location, including fault prelocation, pinpointing, cable tracing, and phase identification. Our portable handheld instruments are ideal for efficiently resolving cable faults, while our standalone cable fault locating systems integrate multiple functions and testing methods to handle LV, MV, and HV cables in portable, rugged units designed for all terrains. For a complete solution, our vehicle-installed cable fault location systems come fully equipped, offering unmatched on-site diagnostic and testing capabilities. 

Resolving underground cable faults requires a structured approach. Initial low-voltage testing confirms the fault, then time domain reflectometers (TDRs) estimate its location. For high-resistance faults, arc reflection or impulse current methods are used. Precise pinpointing is then achieved using surge generators (thumpers) and specialised receivers to find the exact location before excavation. Megger's cable fault detection tools cover every stage -from compact portable devices to fully integrated all-in-one systems.

Many of our stand-alone cable testing products feature smart software that guides users through the fault location process, automatically adjusting parameters, interpreting results, and recommending the next steps. This simplifies the process for beginners and saves time for experts, while still allowing manual control over all settings when required.  

You can purchase our products and solutions directly from Megger, through our sales representatives, or via authorized distributors. For more information, reach out to us with an inquiry today through our contact form. 

Find out more

Can’t find what you’re looking for? Contact us to speak with an expert about your unique needs.

Additional Resources

Take a deeper dive into cable fault testing instruments through our comprehensive guides.

Case Study: Power Plant

A major outage in a remote location made it hard to find a service provider.

Read More

Testing and Diagnostics on Long Cables

View our poster with specs for every kind of cable.

Read More

Product Catalogue

Shop cable fault location, testing, and diagnostics solutions.

Read More

App Note: EZ-Thump 3 kV

Explore the protocol for locating faults in LV multi-conductor cables.

Read More

IEEE Paper

Learn excitation voltages for partial discharge diagnostics on medium cables.

Read More

The Cable World

Find all your cable faults and assess your network with our interactive guide.

Read More