Transformer Bushing Testing: A Practical Guide to Capacitance, Tan Delta, and Hot Collar Measurements
A transformer doesn’t usually fail from the inside out. It fails from the bushings. Bushing failures account for a disproportionate share of transformer in-service failures. Industry studies and utility reliability surveys have reported figures of approximately 15% to 40%, varying with transformer population, voltage class, and age profile — and the failures tend to be catastrophic: explosive porcelain… Read More: Transformer Bushing Testing: A Practical Guide to Capacitance, Tan Delta,… »