Partial Discharge Testing and Monitoring

Identify and address equipment faults at the earliest possible stage.

Partial discharge (PD) is one of the earliest signs of an emerging fault in electrical systems. Accurately identifying the signs of PD gives you the best chance of mitigating problems before they occur — and the best chance comes from our advanced PD measurement and monitoring solutions through the use of partial discharge meters and analyzer.

Megger’s portfolio includes tools for accurate partial discharge testing and analyzing, through the use of partial discharge meters and detectors that can identify deteriorating insulation and weak spots in rotating machines, transformers, cables, switchgear, and bushings. Our advanced partial discharge monitoring and measurement solutions can be used to implement condition-based maintenance strategies on-site, or to complete rigorous quality assurance tests to fulfil factory acceptance testing (FAT) and site acceptance testing (SAT) requirements.

Ready to harness the powerful searching capabilities of PD measurements but can't allocate resources today? Let Megger handle it for you. Explore the comprehensive services we offer.

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Large partial discharge analyser, supporting partial discharge detection and testing in distribution networks through the use of Megger's equipment.

PD Sensors

Bushing Accessories

Discontinued

FOS1 Fiber Optic Transmission System

Analog transmission of analog signals from DC up to 10 MHz

Discontinued

FOS2 Fiber Optic Transmission System

Digital transmission of analog signals from DC up to 20 kHz converted at a sampling rate of 100 kHz

Discontinued

FOS3 Fiber Optic Transmission System

Suitable for high voltage and high current laboratories including pulse-power applications

Browse all partial discharge services

Reduce downtime and risk:

Partial discharge is one of the most effective ways of detecting insulation degradation at the earliest stage. Megger’s sensitive PD monitoring solutions give you all the tools you need from partial discharge meters to PD detectors. Partial discharge tools will detect these issues at their inception and adopt condition-based maintenance — key for avoiding disruptions and downtime, minimizing operational risks and making the best use of your resources.

Expert support for your needs:

It’s not just our PD testing solutions that are designed to be intuitive and high quality. Our support is too. With the acquisition of PDIX by the Megger group, we draw from the extensive and proven expertise in PD testing and high voltage diagnostics that has made the PDIX brand a global leader for more than 30 years. The Megger team of experts are on hand to share their unrivalled expertise in PD testing, helping you get the full benefit of PD insights — no matter how complex your application is.

Quality you can rely on:

Megger partial discharge testing gives you confidence in the condition and reliability of your assets. Whether you’re conducting FAT or SAT tests, maintenance inspections, or evaluating an asset after repair, our high-quality solutions will ensure that your asset is ready for safe and reliable operation.

Reliability you can count on:

Megger's advanced partial discharge monitoring tools highlight when these faults begin to occur so you can act to improve equipment reliability at the earliest opportunity, without risking unplanned downtime, using our market-leading partial discharge test equipment.

What is partial discharge (PD) in electrical systems?

Partial discharge is a dielectric breakdown of a small area in the insulation of electrical systems. It can be caused by discontinuities or imperfections in the insulation system.

Why is partial discharge testing important?

Partial discharge activity is an indicator of an incipient insulation fault which can lead to an insulation breakdown and costly outage of the electrical asset. Megger’s partial discharge detection and analysis equipment provides reliable defect identification, enabling proactive planning to prevent insulation system breakdowns.

How can partial discharge monitoring prevent equipment failures?

Failures of essential electrical assets can cost millions in loss of income or equipment replacement. Partial discharge monitoring provides an early warning indicator of incipient faults and crucial data for condition-based maintenance before a fatal breakdown.

Understanding how to choose the right partial discharge detector is key to effective partial discharge testing, detection and safeguarding both your electrical systems and your business.

What tools are used for partial discharge measurement?

Depending on the device under test or monitoring, different sensors and instruments can be used: a combination of GISmonitor or AIAcompact and UHF sensors for Gas Insulated Switchgears (GIS), ICMmonitor, ICMobserver and ICMsystem for transformer/rotating machine monitoring and measurement along with coupling capacitors or bushing adaptors, and cable testing can be performed with ICMflex. Megger offers a wide portfolio including many other partial discharge test equipment and instruments for different applications.

Megger partial discharge analyser equipment testing high-voltage transformer on-site with engineers performing PD testing and diagnostics.

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Can’t find what you’re looking for? Fill out the contact form below to speak with an expert and get guidance on how to choose the right partial discharge test equipment like a PD detector for your specific needs.

Additional Resources

Take a deeper dive into partial discharge testing with our articles and insights.

On-line partial discharge (PD) spot testing in a European refinery (Part I)

A long-term Megger customer faced a critical 110 kV cable failure, driving efforts to prevent future incidents.

On-line partial discharge (PD) spot testing in a European refinery (Part II)

Routine on-line PD measurements at a European refinery revealed discharge activity near an aging transformer, prompting further analysis to extend its life, manage risks, and optimize costs.