High voltage insulator busbars reduce risk of faults and improve operational efficiency. Substations benefit from compact layouts and high insulation. In Proceedings of the 2023 IEEE Energy Conversion Congress and Exposition (ECCE), Nashville, TN, USA, 29 October–2 November 2023. Busbars. This article provides a comprehensive overview of busbars, covering their construction, function, classification, selection, and applications in high-voltage power systems. Construction and Working Principle of Busbars Busbars are constructed from conductive metal bars, typically made of copper. Electrical system failures can be costly and dangerous.