Final Report of the 2004 - 2007 International Enquiry on Reliability of High Voltage Equipment - “Part 1 - Summary and General Matters”

This document presents summaries of the results of an extensive world wide utility survey of service experience of circuit breakers, disconnectors, earthing switches, instrument transformers and gas insulated switchgear. In addition, the objectives and scope of the enquiry, information about how the survey was organized, explanations of the statistical methods being applied and suggestions on how utilities can use the results, are included.