When failures of overhead transmission lines (OHTL) occur, the opportunity to collect information and materials that would be invaluable for assessing the causes and improving engineering, construction, and asset management processes is often lost as crews seek to restore and reenergize failed facilities. This loss is in part due to a lack of consensus understanding among utility personnel – including first responders – regarding the value of collecting failure event information before a site is disturbed, and what information and materials need to be collected.
To assist in addressing this gap in resources, guidelines for the collection of the field data from an OHTL failure site have been developed. Understanding and adhering to these guidelines will help utilities collect failure event data and related resources in a thorough and systematic manner intended to facilitate more effective failure investigations and, in turn, foster more effective asset management. This guide is designed to be a reference to aid asset managers and first responders in understanding what, how, and why to collect various types of information and samples from a failure site. The document is comprised of two primary components: a narrative and a set of failure investigation forms.
Failure investigation, First responder, Data collection Trigger event, Victim event, Anomaly, Wire, Structure, Load, Strength, Wind, Ice