IEC 60296:2012, Fluids for electrotechnical applications – Unused mineral insulating oils for transformers and switchgear IEC 60422:2013, Mineral insulating oils in electrical equipment – Supervision and maintenance guidance IEC 61203:1992, Synthetic organic esters for electrical purposes – Guide for maintenance of transformer esters in equipment CIGRE Brochure 413:2010, Insulating Oil Regeneration and Dehalogenation IEC TR 62874:2015, “Guidance on the interpretation
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