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Partial discharge testing is an essential, proven tool that can locate and identify flaws in the insulation of cables, bushings, windings, tap changers and a myriad of other assets and accessories. In the early stage of ageing of insulated materials, detection of deteriorating performance may be difficult to detect by traditional test methods.
However partial discharge still occurs and can be monitored its source identified. Power Diagnostix offers a wide range of test equipment for onsite on- and off-line tests and PD monitoring, as well as PD acceptance testers for factory testing laboratories.
Additionally, on-line PD measurements that use acoustic and UHF sensors help keep aged GIS equipment in service, which is essential to reduce the increasing number of these assets that have reached the end of their projected lifespans. PD measurements that use acoustic and UHF sensors offer further benefits.
In the case of acoustic measurements, so-called ‘bouncing particles’ provide high sensitivity, whereas external ring antennas, window sensors and embedded sensors enable survey measurements to be taken and partial discharge activity in the UHF range to be monitored. Due to these benefits, Power Diagnostix has created instruments that combine UHF and accoustic measurements.
The Global Partial Discharge Testing Equipment Market accounted for $XX Billion in 2022 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2023 to 2030.
Megger partial discharge scan – The PD Scan is an on-line partial discharge (PD) handheld scanner for detecting defects in medium and high voltage systems (MV and HV). Such defects not only require costly repairs, but also can lead to failures of entire network sections with corresponding consequences.
Therefore, it is in the interest of all network operators to recognise signs of impending defects as early as possible and to be able to take appropriate countermeasures on time.
With the PD Scan, Megger offers a lightweight, robust, and portable PD scanner that can quickly inspect various type of equipment for partial discharge signals.
The PD Scan is used for the early detection of partial discharges emanating from defects in medium voltage switchgears and other electric equipment. For this purpose, the device has two internal sensors (TEV and airborne acoustic) and can also be operated with various types of external sensors (TEV, HFCT, airborne acoustic, and contact probes).
Thanks to the large variety of sensors, the PD Scan can be used for multiple application ranges. For instance, PD within the cable insulation can be detected using the HFCT sensor, PD in encapsulated switchgears can be measured by using the contact-probe sensor, and corona and surface discharges in MV and HV systems can be identified with the parabolic acoustic sensor.
