British Standards Institution

Sector: Sustainability

Overview: Under the direction of the Standards Policy and Strategy Committee, is responsible for the UK input to the work of IEC/TC36 and standards for insulators for high voltage systems and equipment including bushings, insulators for overhead lines and substations and their couplings.

Committee standards activity

In Progress (32)

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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 TS 36A-251 ED1:	General requirements for tap adapter of capacitance graded bushing Categories: Information management \| Standardization. General rules Proposal begins : 2024-10-24	Proposal
PNW 36-600 ED1:	Composite insulated cross-arms with a.c. rated voltage greater than 1 000 V and d.c. voltage greater than 1 500 V - Definitions, design criteria, test methods and acceptance criteria Categories: Information management \| Standardization. General rules Proposal begins : 2024-04-22	Proposal
PD IEC/TS 63634 Ed.1.0	General requirements for tap adapter of capacitance graded bushing Categories: Unclassified documents Drafting begins : 2026-04-20	Drafting
PD IEC/TS 63594 Ed.1.0	Composite insulated cross-arms with AC rated voltage greater than 1 000 V and DC voltage greater than 1 500 V – Definitions, design criteria, test methods and acceptance criteria Categories: Unclassified documents Drafting begins : 2026-04-20	Drafting
PD IEC/TS 63493-2 ED1	Transformer bushings dimensional standardization. Part 2: High voltage bushings Categories: Unclassified documents Public comment begins :	Public comment
PD IEC/TS 63432 Ed.1.0	Room temperature vulcanising (RTV) silicone rubber for outdoor insulators Categories: Unclassified documents Public comment begins :	Public comment
PD IEC/TS 61643-05 ED1	Low-voltage surge protective devices - Requirements and test methods of SPD monitoring device (SMD) Categories: Unclassified documents Comment resolution begins : 2026-06-11	Comment resolution
PD IEC/TS 60815-4 Ed.2.0	Selection and dimensioning of high-voltage insulators intended for use in polluted conditions. Part 4: Insulators for d.c. systems Categories: Unclassified documents Public comment begins :	Public comment
PD IEC/TR 63493-2 Ed.1.0	Transformer bushings dimensional standardization. - Part 2: High voltage bushings Categories: Unclassified documents Drafting begins : 2025-07-11	Drafting
BS EN IEC/IEEE 65700:2018	Bushings for DC application Categories: Bushings Approval begins :	Approval

Published (52)

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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/TS 61463:2016	Bushings. Seismic qualification Categories: Bushings Published standard begins : 2016-08-19	Published standard
PD IEC/TS 60815-4:2016	Selection and dimensioning of high-voltage insulators intended for use in polluted conditions. Insulators for d.c. systems Categories: Insulators Published standard begins : 2016-11-03	Published standard
PD IEC TS 63493-1:2025	Transformer bushings dimensional standardization. Part 1: Medium voltage bushings with <i>U</i><sub>m</sub> from 12 kV up to and including 52 kV and <i>I</i><sub>r</sub> from 630 A up to and including 3 150 A Categories: Bushings Published standard begins : 2025-12-17	Published standard
PD IEC TS 63414:2025	Artificial pollution tests on high-voltage polymeric insulators to be used on AC and DC systems Categories: Insulators Published standard begins : 2026-01-07	Published standard
PD IEC TS 63264:2026	Composite insulators with integrated optical fibres for AC voltages greater than 1 000 V and DC voltage greater than 1 500 V. Definitions, tests methods and acceptance criteria Categories: Insulators Published standard begins : 2026-04-13	Published standard
PD IEC TS 60815-3:2025	Selection and dimensioning of high-voltage insulators intended for use in polluted conditions. Polymer insulators for AC systems Categories: Insulators Published standard begins : 2025-12-09	Published standard
PD IEC TS 60815-2:2025	Selection and dimensioning of high-voltage insulators intended for use in polluted conditions. Ceramic and glass insulators for AC systems Categories: Insulators Published standard begins : 2025-12-09	Published standard
PD IEC TS 60815-1:2025	Selection and dimensioning of high-voltage insulators intended for use in polluted conditions. Part 1: Definitions, information and general principles Categories: Insulators Published standard begins : 2025-11-27	Published standard
PD IEC TR 62730:2012+A1:2024	HV polymeric insulators for indoor and outdoor use tracking and erosion testing by wheel test and 5 000 h test Categories: Insulators Published standard begins : 2024-08-16	Published standard
PD CLC/TR 62662:2011	Measurement procedures for materials used in photovoltaic modules. Encapsulants. Test procedure of optical durability Categories: Solar energy engineering \| Insulators Published standard begins : 2011-12-07	Published standard

Withdrawn (26)

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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/TS 62896:2015	Hybrid insulators for a.c. and d.c. high-voltage applications. Definitions, test methods and acceptance criteria Categories: Insulators Withdrawn begins : 2024-05-22	Withdrawn
PD IEC/TS 62073:2016	Guidance on the measurement of hydrophobicity of insulator surfaces Categories: Insulators Withdrawn begins : 2026-08-06	Withdrawn
PD IEC/TS 61245:2015	Artificial pollution tests on high-voltage ceramic and glass insulators to be used on d.c. systems Categories: Insulators Withdrawn begins : 2018-09-18	Withdrawn
PD IEC/TR 62730:2012	HV polymeric insulators for indoor and outdoor use tracking and erosion testing by wheel test and 5 000h test Categories: Insulators Withdrawn begins : 2024-08-16	Withdrawn
PD IEC/TR 62662:2010	Guidance for production, testing and diagnostics of polymer insulators with respect to brittle fracture of core materials Categories: Insulators Withdrawn begins : 2011-12-08	Withdrawn
DD IEC/TS 60815-3:2008	Selection and dimensioning of high-voltage insulators intended for use in polluted conditions. Polymer insulators for a.c. systems Categories: Insulators Withdrawn begins : 2025-12-09	Withdrawn
DD IEC/TS 60815-2:2008	Selection and dimensioning of high-voltage insulators intended for use in polluted conditions. Ceramic and glass insulators for a.c. systems Categories: Insulators Withdrawn begins : 2025-12-09	Withdrawn
BS IEC/IEEE 65700-19-03:2014	Bushings for DC application Categories: Bushings Withdrawn begins : 2018-04-24	Withdrawn
BS EN 62772:2016	Composite hollow core station post insulators for substations with a.c. voltage greater than 1 000 V and d.c. voltage greater than 1 500 V. Definitions, test methods and acceptance criteria Categories: Insulators Withdrawn begins : 2024-01-08	Withdrawn
BS EN 61952:2003	Insulators for overhead lines. Composite line post insulators for alternative current with a nominal voltage > 1000 V Categories: Insulators \| Power transmission and distribution lines Withdrawn begins : 2009-03-09	Withdrawn

Standards Development

PEL/36 - Insulators for power systems

Committee standards activity