Partial Discharge Services

Unmatched expertise in partial discharge testing and measurement services for reliable, efficient, and secure electrical asset management.

Megger’s on-site PD testing delivers precise diagnostics and early fault detection, helping asset owners boost reliability, cut outages, reduce maintenance costs, extend asset life, and improve safety across high-voltage systems.

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Enhanced High‑Voltage Safety

Megger’s on‑site PD testing improves safety by identifying insulation faults early, reducing the risk of electrical failures. Accurate diagnostics help asset owners prevent hazardous breakdowns and maintain safe operation of high‑voltage systems.

Maximised Asset Reliability

Advanced PD testing delivers precise, early fault detection for GIS, transformers, rotating machines, and cables—minimising unplanned outages and extending asset lifecycles. Tailored services ensure dependable, long‑term equipment performance.

Actionable Diagnostic Insights

Megger combines cutting‑edge PD technology with expert interpretation to provide clear, actionable insights. Asset owners gain deeper understanding of equipment condition, supporting informed maintenance planning and improved decision‑making.

All Partial Discharge Testing and Monitoring Cable systems Rotating machines Transformers Switchgear (AIS/GIS/GIL) Factory Acceptance Testing (FAT) Systems Partial Discharge Services Partial Discharge Portable Testing Equipment

Proven Expertise

With over 130 years of engineering excellence and innovation, Megger is a trusted name in electrical diagnostics and testing. Our deep domain expertise ensures accuracy, reliability, and unparalleled service quality.

Comprehensive Solutions

Megger goes beyond testing by providing a complete ecosystem for electrical asset management, including advanced diagnostic tools, expert consulting, and predictive analytics to safeguard critical infrastructure.

Global Reach and Local Support

Operating in 160 countries, Megger offers seamless access to on-site services and solutions wherever needed. Our highly skilled engineers deliver on-site testing expertise with rapid response times.

Cutting-Edge Technology

We leverage the latest technologies in partial discharge testing, offering superior signal processing, optimal noise filtering, and robust data analytics. Our state-of-the-art tools lead the industry in precision and effectiveness.

Frequently Asked Questions

What is partial discharge testing and why is it important?

Partial discharge is a localised electrical discharge that weakens insulation over time, potentially causing catastrophic failures. Testing helps detect PD at an early stage, enabling proactive maintenance and improving asset longevity and operational safety.

What industries benefit from Megger’s PD on-site services?

Our services support industries such as power generation, transmission, and distribution, as well as manufacturing facilities, oil and gas operations, and data centres with high-voltage equipment.

What specific equipment is tested during on-site PD services?

Megger tests various high-voltage assets, including gas-insulated switchgear (GIS), power transformers, rotating machines, and cable systems, ensuring complete diagnostics and reliability across electrical systems.

Are your services tailored to specific client needs?

Yes, we provide customised solutions based on your requirements, including PD acceptance testing, sensor installation, result consulting, and system integration for optimal performance and reliability.

Ensure the longevity and safety of your high voltage assets

Contact us to schedule a consultation or learn more about Megger’s advanced on-site partial discharge testing services tailored to your needs.

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Additional Resources

Expand your knowledge on Megger’s advanced partial discharge testing solutions with our library of technical content.

Partial Discharge Testing Services from Power Diagnostix by Megger

Advanced cable test and diagnostics in action: partial discharge diagnostics

Q&A: Partial discharge testing

Testing Laboratory

High voltage test lab in Aachen

Onsite On and Offline Measurements

Megger engineers are available on short notice for various kinds of dielectric measurements such as partial discharge, loss factor, or others

Consulting Activities

Megger assists to analyse encountered defects, failure mechanism, and helps to improve the design of insulation systems. Further, support is provided to implement monitoring systems and to integrate embedded partial discharge sensors into GIS, cable accessories, and transformers for instance