Materials such as copper, aluminium and tungsten are extensively utilised in high-voltage (HV) equipment due to their electrical specifications. However, according to the study on the CRMs for the EU. Overhead transmission lines, un-derground/submarine cables and transformers require concrete, specialty steel, copper, polymers, aluminium, lead and specialty oil. The purpose of insulation materials extends beyond mere protection; they also play a critical role in enhancing overall safety. This paper explores the advancements in materials technology for high-voltage insulation, focusing on the transition from traditional materials like porcelain and glass to modern polymer-based composites. It highlights the significant improvements in outdoor insulation for power transmission and. Progression in the field of insulating materials for power transformers and other high voltage devices is visible regardless of the type of insulation: solid, liquid, or gas.
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