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/TC 96 on standardisation in the field of safety and EMC of transformers, reactors power supply units and similar products for low voltages up to 1100V a.c and a rated frequency up to 100 MHz

Committee standards activity

In Progress (3)

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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 106-667 ED1:	Assessment of power density of human exposure to radio frequency fields from wireless devices in close proximity to the head and body (frequency range of 6 GHz to 300 GHz) - Part 3: Measurement procedure for absorbed power density Categories: Information management \| Standardization. General rules Proposal begins : 2024-09-23	Proposal
PNW 106-666 ED1:	Assessment of power density of human exposure to radio frequency fields from wireless devices in close proximity to the head and body (frequency range of 6 GHz to 300 GHz) - Part 4: Computational procedure for absorbed power density Categories: Information management \| Standardization. General rules Proposal begins : 2024-09-23	Proposal
96/504/NP	Safety of transformers, reactors, power supply units and combinations thereof - Part 2-14: Particular requirements and tests for variable transformers and power supply units incorporating variable transformers for general applications Categories: Information management \| Standardization. General rules \| Engineering \| Electrical engineering \| Transformers. Reactors \| ICT \| Telecommunications. Audio and video engineering \| Electromagnetic compatibility (EMC) Proposal begins : 2021-03-03	Proposal

Published (42)

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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 62041:2020	Transformers, power supplies, reactors and similar products. EMC requirements Categories: Transformers. Reactors \| Electromagnetic compatibility. General Published standard begins : 2020-02-21	Published standard
BS EN IEC 61558-2-9:2025	Safety of transformers, reactors, power supply units and combinations thereof. Particular requirements and tests for transformers and power supply units for class III handlamps Categories: Transformers. Reactors Published standard begins : 2025-03-21	Published standard
BS EN IEC 61558-2-8:2025	Safety of transformers, reactors, power supply units and combinations thereof. Particular requirements and tests for transformers and power supply units for bells and chime Categories: Transformers. Reactors Published standard begins : 2025-03-21	Published standard
BS EN IEC 61558-2-7:2025	Safety of transformers, reactors, power supply units and combinations thereof. Particular requirements and tests for transformers and power supply units for toys Categories: Transformers. Reactors Published standard begins : 2025-03-20	Published standard
BS EN IEC 61558-2-6:2025	Safety of transformers, reactors, power supply units and combinations thereof. Particular requirements and tests for safety isolating transformers and power supply units incorporating safety isolating transformers for general applications Categories: Transformers. Reactors Published standard begins : 2025-03-19	Published standard
BS EN IEC 61558-2-5:2025	Safety of transformers, reactors, power supply units and combinations thereof. Particular requirements and tests for transformers for shavers, power supply units for shavers and shaver supply units Categories: Transformers. Reactors Published standard begins : 2025-03-19	Published standard
BS EN IEC 61558-2-4:2025	Safety of transformers, reactors, power supply units and combinations thereof. Particular requirements and tests for isolating transformers and power supply units incorporating isolating transformers for general applications Categories: Transformers. Reactors \| Electronic components. General Published standard begins : 2025-03-20	Published standard
BS EN IEC 61558-2-3:2025	Safety of transformers, reactors, power supply units and combinations thereof. Particular requirements and tests for ignition transformers for gas and oil burners Categories: Transformers. Reactors Published standard begins : 2025-03-20	Published standard
BS EN IEC 61558-2-23:2025	Safety of transformers, reactors, power supply units and combinations thereof. Particular requirements and tests for transformers and power supply units for construction sites Categories: Transformers. Reactors \| Electrical installations. Outdoor use Published standard begins : 2025-03-20	Published standard
BS EN IEC 61558-2-20:2025	Safety of transformers, reactors, power supply units and combinations thereof. Particular requirements and tests for small reactors Categories: Transformers. Reactors Published standard begins : 2025-03-19	Published standard

Withdrawn (13)

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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 62041:2010	Safety of transformers, reactors, power supply units and combinations thereof. EMC requirements Categories: Transformers. Reactors \| Electromagnetic compatibility. General Withdrawn begins : 2020-02-21	Withdrawn
BS EN 62041:2003	Power transformers, power supply units, reactors and similar products. EMC requirements Categories: Transformers. Reactors \| Electromagnetic compatibility. General Withdrawn begins : 2013-12-02	Withdrawn
BS EN 61558-2-3:2000, IEC 61558-2-3:1999	Safety of power transformers, power supply units and similar. Particular requirements for ignition transformers for gas and oil burners Categories: Transformers. Reactors Withdrawn begins : 2013-07-01	Withdrawn
BS EN 61558-2-23:2001, IEC 61558-2-23:2000	Safety of power transformers, power supply units and similar. Particular requirements for transformers for construction sites Categories: Transformers. Reactors \| Electrical installations. Outdoor use Withdrawn begins : 2013-10-07	Withdrawn
BS EN 61558-2-20:2001, IEC 61558-2-20:2000	Safety of power transformers, power supply units and similar. Particular requirements for small reactors Categories: Transformers. Reactors Withdrawn begins : 2014-01-17	Withdrawn
BS EN 61558-2-19:2001, IEC EN 61558-2-19:2000	Safety of power transformers, power supply units and similar. Particular requirements for perturbation attenuation transformers Categories: Transformers. Reactors Withdrawn begins : 2012-06-18	Withdrawn
BS EN 61558-2-16:2009	Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1100 V. Particular requirements and tests for switch mode power supply units and transformers for switch mode power supply units Categories: Transformers. Reactors Withdrawn begins : 2014-02-28	Withdrawn
BS EN 61558-2-13:2000, IEC 61558-2-13:1999	Safety of power transformers, power supply units and similar. Particular requirements for auto-transformers for general use Categories: Solar energy engineering \| Wind turbine energy systems \| Transformers. Reactors Withdrawn begins : 2009-09-07	Withdrawn
BS EN 61558-2-12:2001	Safety of power transformers, power supply units and similar. Particular requirements for constant voltage transformers Categories: Transformers. Reactors Withdrawn begins : 2014-03-10	Withdrawn
BS EN 61558-2-10:2014	Safety of transformers, reactors, power supply units and combinations thereof. Particular requirements and tests for separating transformers with high insulation level and separating transformers with output voltages exceeding 1 000 V Categories: Transformers. Reactors Withdrawn begins : 2024-07-30	Withdrawn

Standards Development

PEL/96 - Small transformers

Committee standards activity