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 62697-1:2012, Test method for quantitative determination of dibenzyldisulfide (DBDS) 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
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