Elevate switchgear performance with Megger's partial discharge testing. Our solutions ensure insulation integrity, detect degradation early, and reduce unplanned downtime across GIS/GIL systems, ensuring reliability and safety in your power grids.
Megger’s PD testing for GIS and GIL identifies insulation degradation at the earliest stage, helping prevent hazardous failures. With advanced detection, UHF sensor integration, and continuous monitoring, operators can ensure safer, more stable switchgear operation.
Megger’s solutions detect early insulation issues, verify SF₆ integrity, and support routine maintenance, reducing unplanned downtime. Scalable portable and permanent systems ensure repeatable diagnostics and long-term reliability for modern and ageing switchgear.
Continuous and parallel PD monitoring, transparent data recording, and extensive historical analysis provide deep insights into insulation condition. These diagnostics enable proactive maintenance planning and help prevent future grid disruptions.
The effects of partial discharge can be severe if left undetected. PD progressively degrades insulation through thermal, chemical, and electrical stress, eventually leading to insulation failure, flashover events, and unplanned outages. In critical assets such as gas-insulated switchgear (GIS), this can result in costly downtime and safety risks.
Early detection using advanced PD monitoring techniques helps identify defects before failure occurs, supporting maintenance and extending asset life. By combining portable and continuous monitoring, early action can be taken. We create many monitoring solutions for the causes of partial discharge in switchgear, some of the following a select few examples:
For rapid on-site testing a UHF PD detector can be used - capturing high-frequency signals generated by partial discharge. For more advanced diagnostics - ICMsystem or AIAcompact can be used. In critical applications such as gas-insulated switchgear (GIS) - Megger's continuous GISmonitor can provide real-time, automated detection of PD activity.
Partial discharge (PD) in switchgear is typically caused by insulation defects, environmental stress, and installation or ageing issues. Common causes include voids or cracks in insulation, contamination from dust or moisture, and high humidity that reduces dielectric strength. PD testing and monitoring identifies early signs in switchgear systems such as GIS and GIL - enabling proactive maintenance and preventing equipment related downtime or failures.
GIS and GIL are often equipped with embedded UHF sensors that can pick up the irradiated PD signal: Megger’s solutions can be directly connected to such outputs and analyse the type of insulation defect that is generating partial discharges. For older assets that are not equipped with such sensors, Megger can also provide easy and quick retrofitting options.
Megger's solutions feature constant and continuous monitoring on all the connected sensors, unparalleled historical analysis for in-depth analysis, dedicated modes for HV tests and sensitivity verification. The centralised architecture of the permanent monitoring system ensures cost-effectiveness and highly reduced maintenance. The high number of sensors connectable to the portable units allow extensive and easy temporary monitoring on even the largest GIS.
Yes, partial discharge testing is crucial to see causes and effects for ageing GIS and GIL switchgear systems. Megger's solutions offer online monitoring and diagnostics to extend operational reliability and prevent unexpected failures.
Learn how Megger can enhance your switchgear system's reliability and longevity with advanced partial discharge testing solutions.
Expand your knowledge on Megger’s advanced partial discharge testing solutions with our library of technical content.
