With over 100 years of experience the British Standards Institute is recognised as the UK’s National standards body. Their committees work with the manufacturing and service industries, government, businesses and consumers to facilitate the production of British, European and International standards.
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Series details
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Title
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Year
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Status
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BS EN IEC 61535:2019
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Installation couplers intended for permanent connection in fixed installations
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2019
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Replaced, remains current
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BS EN IEC 61535:2024
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Installation couplers intended for permanent connection in fixed installations
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2024
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Current
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BS EN IEC 61543:2023
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Residual current-operated protective devices (RCDs) for household and similar use - electromagnetic compatibility (+A11:2023)
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2023
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Current
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BS EN IEC 61557-1:2021
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Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC - Equipment for testing, measuring or monitoring of protective measures. General requirements (+A1:2024)
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2021
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Current
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BS EN IEC 61557-1:2021
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Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. - equipment for testing, measuring or monitoring of protective measures. General requirements
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2021
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Replaced, remains current
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BS EN IEC 61557-2:2021
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Electrical safety in low voltage distribution systems up to 1000 V AC and 1500 V DC - equipment for testing, measuring or monitoring of protective measures. Insulation resistance
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2021
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Current
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BS EN IEC 61557-3:2022
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Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. - equipment for testing, measuring or monitoring of protective measures. Loop impedance
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2022
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Current
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BS EN IEC 61557-4:2021
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Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. - equipment for testing, measuring or monitoring of protective measures. Resistance of earth connection and equipotential bonding
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2021
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Current
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BS EN IEC 61557-5:2021
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Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. Equipment for testing, measuring or monitoring of protective measures. Resistance to earth
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2021
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Current
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BS EN IEC 61557-6:2021
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Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. - equipment for testing, measuring or monitoring of protective measures. Effectiveness of residual current devices (RCD) in TT, TN and IT systems
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2021
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Current
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BS EN IEC 61557-7:2022
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Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. Equipment for testing, measuring or monitoring of protective measures. Phase sequence
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2022
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Withdrawn
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BS EN IEC 61557-9:2025
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Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC - Equipment for testing, measuring or monitoring of protective measures. Equipment for insulation fault location in IT systems
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2025
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Current
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BS EN IEC 61557-10:2024
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Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC – Equipment for testing, measuring or monitoring of protective measures. Combined measuring equipment for testing, measuring and monitoring of protective measures
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2024
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Current
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BS EN IEC 61558-1:2019
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Safety of transformers, reactors, power supply units and combinations thereof. General requirements and tests
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2019
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Current
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BS EN IEC 61558-2-1:2025
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Safety of transformers, reactors, power supply units and combinations thereof. Particular requirements and tests for separating transformers and power supply units incorporating separating transformers for general applications
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2025
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Current
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BS EN IEC 61558-2-5:2025
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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
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2025
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Current
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BS EN IEC 61558-2-6:2025
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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
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2025
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Current
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BS EN IEC 61558-2-13:2025
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Safety of transformers, reactors, power supply units and combinations thereof. Particular requirements and tests for auto-transformers and power supply units incorporating auto-transformers for general applications
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2025
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Current
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BS EN IEC 61558-2-15:2025
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Safety of transformers, reactors, power supply units and combinations thereof. Particular requirements and tests for isolating transformers for medical IT systems for the supply of medical locations
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2025
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Current
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BS EN IEC 61558-2-16:2025
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Safety of transformers, reactors, power supply units and combinations thereof. Particular requirements and tests for switch mode power supply units and transformers for switch mode power supply units for general applications
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2025
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Current
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