British Standards Institution

Sector: Manufacturing

Overview: Under the direction of the Standards Policy and Strategy Committee, is responsible for the UK input into International Technical Committee IEC/TC10 which prepares standards, revisions and amendments for product specifications, test methods, maintenance and use guides for liquid and gaseous dielectrics; for lubricants and control fluids for steam turbines, generators and control systems.

Committee standards activity

In Progress (16)

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Reference	Standards description	Status ? The standards development process is divided into chronological stages: Proposal; Drafting; Public comment; Comment resolution; Approval; Published standard.
PNW 10-1214 ED1	Interpretation of Dissolved Gas Analysis in natural and synthetic esters Categories: Information management \| Standardization. General rules Proposal begins : 2024-02-02	Proposal
PD IEC/TR 61294 Ed.2.0	Insulating liquids - Determination of the partial discharge inception voltage (PDIV) - Test procedure Categories: Unclassified documents Drafting begins : 2024-04-19	Drafting
BS IEC 63030 Ed.1.0	. . Categories: Unclassified documents Public comment begins : 2018-08-30	Public comment
BS IEC 63025-2 Ed.1.0	Quantitative determination of methanol and other light alcohols in insulating liquids. - Part 2: Method for non mineral insulating liquids Categories: Unclassified documents Public comment begins : 2020-01-24	Public comment
BS EN IEC 63585 ED1	Interpretation of Dissolved Gas Analysis in natural and synthetic esters Categories: Insulating oils \| Transformers. Reactors Public comment begins : 2025-04-18	Public comment
BS EN IEC 63359 Ed.1.0	Fluids for electrotechnical application: Specifications for the re-use of mixtures of gases alternative to SF<sub>6</sub> Categories: Insulating fluids. General Comment resolution begins : 2025-11-24	Comment resolution
BS EN 61619 Ed.2.0	Insulating liquids - Contamination by polychlorinated biphenyls (PCBs) - Method of determination by capillary column gas chromatography Categories: Unclassified documents Drafting begins : 2025-12-09	Drafting
BS EN 61294 Ed.1.0	Insulating liquids - Determination of the partial discharge inception voltage (PDIV) - Test procedure Categories: Unclassified documents Drafting begins : 2022-04-22	Drafting
BS EN 61198 Ed.2.0	Mineral insulating oils - Methods for the determination of 2-furfural and related compounds Categories: Unclassified documents Drafting begins : 2025-12-09	Drafting
BS EN 61099 Ed.3.0	Insulating liquids - Specifications for unused synthetic organic esters for electrical purposes Categories: Unclassified documents Drafting begins : 2025-11-11	Drafting

Published (38)

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Reference	Standards description	Status ? The standards development process is divided into chronological stages: Proposal; Drafting; Public comment; Comment resolution; Approval; Published standard.
PD IEC/TR 62874:2015	Guidance on the interpretation of carbon dioxide and 2-furfuraldehyde as markers of paper thermal degradation in insulating mineral oil Categories: Insulating oils Published standard begins : 2015-05-18	Published standard
PD IEC/TR 62697-3:2018	Test methods for quantitative determination of corrosive sulfur compounds in unused and used insulating liquids. Test method for quantitative determination of elemental sulfur Categories: Insulating oils Published standard begins : 2018-03-09	Published standard
PD IEC/TR 62697-2:2018	Test methods for quantitative determination of corrosive sulfur compounds in unused and used insulating liquids. Test method for quantitative determination of total corrosive sulfur (TCS) Categories: Insulating oils Published standard begins : 2018-03-08	Published standard
PD IEC/TR 62036:2007	Mineral insulating oils. Oxidation stability test method based on differential scanning calorimetry (DSC) Categories: Insulating oils Published standard begins : 2007-05-01	Published standard
PD IEC/TR 61946:2007	Mineral insulating oils. Characterization of paraffinic /naphthenic nature. Low temperature differential scanning calorimetry (DSC) test method Categories: Insulating oils Published standard begins : 2007-04-04	Published standard
PD IEC TR 63025:2021	Insulating liquids. Quantitative determination of methanol and ethanol in insulating liquids Categories: Insulating oils Published standard begins : 2021-08-11	Published standard
BS IEC 62975:2021	Natural esters. Guidelines for maintenance and use in electrical equipment Categories: Insulating fluids \| Insulating oils Published standard begins : 2024-08-22	Published standard
BS EN IEC 63360:2025	Fluids for electrotechnical application. Specification of gases alternative to SF6 to be used in electrical power equipment Categories: Fluid systems and components \| Insulating gases \| Insulation \| Electrical insulation. General Published standard begins : 2025-03-19	Published standard
BS EN IEC 63012:2019	Insulating liquids. Unused modified or blended esters for electrotechnical applications Categories: Insulating oils Published standard begins : 2019-07-18	Published standard
BS EN IEC 62961:2018	Insulating liquids. Test methods for the determination of interfacial tension of insulating liquids. Determination with the ring method Categories: Insulating oils Published standard begins : 2018-11-30	Published standard

Withdrawn (19)

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Reference	Standards description	Status ? The standards development process is divided into chronological stages: Proposal; Drafting; Public comment; Comment resolution; Approval; Published standard.
BS EN IEC 60599:2022	Mineral oil-filled electrical equipment in service. Guidance on the interpretation of dissolved and free gases analysis Categories: Electricity. Magnetism. Other \| Insulating oils \| Transformers. Reactors Withdrawn begins : 2024-10-15	Withdrawn
BS EN 62770:2014	Fluids for electrotechnical applications. Unused natural esters for transformers and similar electrical equipment Categories: Insulating fluids. General Withdrawn begins : 2024-11-20	Withdrawn
BS EN 62535:2009	Insulating liquids. Test method for detection of potentially corrosive sulphur in used and unused insulating oil Categories: Insulating oils Withdrawn begins : 2011-02-07	Withdrawn
BS EN 61181:2007	Mineral oil-filled electrical equipment. Application of dissolved gas analysis (DGA) to factory tests on electrical equipment Categories: Insulating oils \| Transformers. Reactors Withdrawn begins : 2012-06-22	Withdrawn
BS EN 60970:2007	Insulating liquids. Methods for counting and sizing particles Categories: Electricity. Magnetism. Other \| Insulating oils Withdrawn begins : 2008-06-13	Withdrawn
BS EN 60836:2005	Specifications for unused silicone insulating liquids for electrotechnical purposes Categories: Insulating oils Withdrawn begins : 2015-11-02	Withdrawn
BS EN 60599:2016	Mineral oil-filled electrical equipment in service. Guidance on the interpretation of dissolved and free gases analysis Categories: Electricity. Magnetism. Other \| Insulating oils \| Transformers. Reactors Withdrawn begins : 2022-07-21	Withdrawn
BS EN 60599:1999, IEC 60599:1999	Mineral oil-impregnated electrical equipment in service. Guide to the interpretation of dissolved and free gases analysis Categories: Electricity. Magnetism. Other \| Insulating oils \| Transformers. Reactors Withdrawn begins : 2007-07-18	Withdrawn
BS EN 60567:2011	Oil-filled electrical equipment. Sampling of gases and analysis of free and dissolved gases. Guidance Categories: Electricity. Magnetism. Other \| Insulating materials. Other \| Insulating oils Withdrawn begins : 2012-02-02	Withdrawn
BS EN 60567:2005	Oil-filled electrical equipment. Sampling of gases and of oil for analysis of free and dissolved gases. Guidance Categories: Insulating oils \| Electricity. Magnetism. Other \| Insulating materials. Other Withdrawn begins : 2012-02-02	Withdrawn

Message Committee Become a committee member

Committee members

Nominating organizations

B E A M A Networks
British Cables Association
Committee Manager
E N A - Energy Networks Association
Energy UK
Royal Society of Chemistry
SP Energy Networks
University of Manchester

Liaisons with other committees

Chair - PTI/7
Expert - Transformer Oil Recycling
Individual Capacity - Dielectric Fluid Laboratory Testing
Individual Capacity - Equipment Manufacturer
Individual Capacity - ester based dielectric liquids
Individual Capacity - Fire Safe, Biodegradable Transformer Liquids
Individual Capacity - Oil handling, testing & analysis
Individual Capacity - SF6 equipment
Individual capacity - Testing of dielectric oil samples
Individual Capacity - Transformer oil
Liaison - GEL/89
Liaison - PEL/14
Liaison - PEL/17

BSI roles

Committee Chair

Standards Development

GEL/10 - Fluids for electrotechnical applications

Committee standards activity