500kV BUSHING FAILURE ROOT CAUSE ANALYSIS AT TENNESSEE VALLEY AUTHORITY (TVA)

摘要

How serious can an oil leak be on a bushing? Can a leak go unobserved above the gauge? Is a traditional bushing testing program enough? Does not seeing any signs of an oil leak mean that there is not a leak? These questions and more will be discussed here in a Root Cause Analysis (RCA) of a 500kV bushing failure.