• IEC 60422:2024, Mineral insulating oils in electrical equipment – Supervision and maintenance guidance
  • ASTM D 7151, Standard Test Method for Determination of Elements in Insulating Oils by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES)
  • IEC 60422:2024, Mineral insulating oils in electrical equipment – Supervision and maintenance guidance
  • CIGRE Brochure 378:2009, Copper sulphide in transformer insulation
  • CIGRE Brochure 413:2010, Insulating Oil Regeneration and Dehalogenation
  • CIGRE Brochure 625:2015, Copper Sulphide long term mitigation and risk assessment