Risk assessment of overhead line hardware on the Eskom distribution business

Abstract

This research report describes a holistic view of the impacts that ESKOM Distribution is currently facing due to poor quality overhead line fittings supplied by local and international manufacturers. Overhead line fittings are components/hardware used to connect power lines to function as a network. The purpose of this research report is to develop an effective overhead line fitting evaluation methodology which will encompass technical requirements to qualify manufacturers of overhead line fittings to supply ESKOM. The report describes, supported by case studies, poor manufacturing processes contributing to overhead line fitting failures. A Microsoft Excel evaluation spreadsheet was developed to evaluate fittings from the technical point of view and ensure compliance to ESKOM’s technical requirements. The evaluation is conducted on submitted documentation and later samples are inspected at the manufacturing premises. The final result of the evaluation is determined by calculating a weighted score for each item. An acceptance score of more than 70% qualifies manufacturers.