What is an acceptable PD level for a 110kV transformer?
For a 110kV power transformer, an acceptable partial discharge (PD) level typically falls between 100–500...
Technical Guide
Dissolved Gas Analysis (DGA) Testers: Smarter Transformer Health Monitoring for 2026
Dissolved Gas Analysis (DGA) Tester technology is transforming transformer health monitoring. Learn how portable DGA...
How can PRPD patterns differentiate internal, surface and corona discharge?
Phase-resolved partial discharge (PRPD) patterns allow engineers to distinguish internal, surface and corona discharge by...
DC System Ground Fault Locator: Faster Fault Location, Higher DC System Reliability (July 2026)
A DC system ground fault locator helps substations, utilities and industrial plants quickly pinpoint DC...
What should you look for in a megohmmeter for high-noise HV areas?
A megohmmeter for high-noise high-voltage environments must combine adequate test voltage (5 kV vs 10...
Is IEEE 400.3 PD testing essential for safe cable networks?
IEEE 400.3 defines how to perform non-destructive partial discharge (PD) field diagnostic testing on shielded...
How can ultrasonic sensors find PD arcing and tracking in switchgear?
Ultrasonic sensors detect partial discharge (PD), arcing, and tracking by listening to high‑frequency acoustic energy...
Is investing in premium silver‑plated, shielded test leads truly worth the long‑term ROI?
High-quality silver-plated, shielded test leads deliver a strong ROI by reducing re-tests, stabilizing readings, and...
What causes low insulation readings on a megohmmeter?
When a motor or cable shows “zero” insulation on a megohmmeter, the cause is usually...
Is a wireless high‑voltage phase detector the safer modern choice?
A wireless high‑voltage phase detector is generally safer and more modern because it removes long...