This International Standard is applicable to specifications and test methods for unused
mineral insulating oils (see Clause 3 for definitions). It applies to oil delivered to the agreed
point and time of delivery, intended for use in transformers, switchgear and similar electrical
equipment in which oil is required for insulation and heat transfer. These oils are obtained by
refining, modifying and/or blending of petroleum products and other hydrocarbons.
Oils with and without additives are both within the scope of this standard.
This standard is applicable only to unused mineral insulating oils.
Recycled oils are beyond the scope of this standard.
This standard does not apply to mineral insulating oils used as impregnants in cables or
capacitors.