Chicago Section

Bushings are usually reliable devices, but they are also one of the most likely causes of catastrophic transformer failure. In this presentation, we look at data which can be collected online to allow for detection and subsequent diagnostics of bushing deterioration including differentiation between raw measurements of waveforms, root mean square RMS currents and ABC phase, derived values of power factor and capacitance and linking to other online techniques such as thermal imaging and PD/EMI surveying and monitoring.

Dr. Tony McGrail is the Doble Engineering Solutions Director for Asset Management and Monitoring Technology. He has several years experience as a utility substation technical specialist in the UK, focusing on power transformer test and assessment, and as a T&D substation asset manager in the USA, focusing on system reliability and performance. Tony is a Fellow of the IET and a Member of IEEE, CIGRE, IAM and ASTM. He has degree in Physics with a subsequent Ph.D. in Applications of AI to Insulation Assessment.

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