Practical Non-Invasive Partial Discharge Cable Testing

William G. Higinbotham Industry Topics, Spring 2021 Industry Topics

Partial discharge (PD) is a poorly understood phenomenon that can cause catastrophic failure of electrical assets. It can exist at initial commissioning or occur only after decades of use. The dictionary defines partial discharge as: a flashover of part of the insulation system due to a localized electric field greater than the dielectric withstand capability of that part where the …

Partial Discharge Secrets, Tips, and Tricks

William G. Higinbotham Fall 2020 Features, Features

Most of us started our electrical careers with fairly good knowledge about the practical aspects of our jobs. We understood voltage, current, power, resistance, etc. We mastered the more esoteric areas such as electrical fields and stress control and only revisited these topics if our day-to-day job required it. Partial discharge (PD) is one of those areas where we might …

What’s in a Partial Discharge Monitoring System?

William G. Higinbotham Fall 2019 Features, Features

Partial discharge (PD) testing is becoming common in U.S. industrial systems and is gaining acceptability in U.S. utilities. Testing in the form of periodic surveys can provide valuable insight into asset condition. Beyond periodic surveys, full-time system monitoring is the state of the art in PD detection, offering additional capabilities that: Warn of rapidly evolving PD situations that might go …