British Standards Institution

Sector: Sustainability

Overview: Under the direction of PEL/121, is responsible for the UK input into IEC/SC 121A Low-Voltage switchgear and controlgear, whose scope is to prepare international standards for low-voltage switchgear and controlgear equipment for industrial and commercial use rated below or equal to 1 kV a.c and 1,5 kV d.c and CLC/TC 121A Low-Voltage switchgear and controlgear. The scope includes open and enclosed separate equipment as well as combinations of equipment into complete functional units, electromechanical as well as semiconductor (solid state) equipment.

Committee standards activity

In Progress (29)

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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 63434 Ed.1.0	Low voltage switchgear and controlgear – Partial discharge voltages and PD-level in low voltage switchgear and controlgear Categories: Unclassified documents Public comment begins :	Public comment
PD CLC IEC/TR 63216:2020	Low-voltage switchgear and controlgear - Electromagnetic compatibility assessment for switchgear and controlgear and their assemblies Categories: Unclassified documents Approval begins : 2020-08-26	Approval
PD CLC IEC/TR 63201	Low-voltage switchgear and controlgear - Guidance for the development ofembedded software Categories: Unclassified documents Approval begins : 2020-08-26	Approval
BS EN IEC 62626-1:2023	Low-voltage switchgear and controlgear enclosed equipment. Additional requirements for enclosed switch-disconnectors in accordance with IEC 60947-3. Isolation of electrical equipment during repair and maintenance work in specific applications Categories: Switches \| Switchgear and controlgear. Low voltage Approval begins : 2023-10-30	Approval
BS EN IEC 62091 Ed. 2.0	BS EN 62091 Ed. 2.0 Low-voltage switchgear and controlgear - Controllers for drivers of stationary fire pumps Categories: Switchgear and controlgear. Low voltage Public comment begins : 2025-01-29	Public comment
BS EN IEC 61095	Electromechanical contactors for household and similar purposes Categories: Electrical accessories. Other \| Switchgear and controlgear. Low voltage Approval begins : 2023-09-11	Approval
BS EN IEC 60947-7-2 Ed. 4.0	BS EN 60947-7-2 Ed. 4.0 Low-voltage switchgear and controlgear -. Part 7-2: Ancillary equipment - Protective conductor terminal blocks forcopper conductors Categories: Switchgear and controlgear. Low voltage \| Transport layer \| Industrial process measurement and control \| Electrical accessories. Other Public comment begins : 2025-01-29	Public comment
BS EN IEC 60947-7-1 Ed. 4.0	BS EN 60947-7-1 Ed. 4.0 Low-voltage switchgear and controlgear -. Part 7-1: Ancillary equipment - Terminal blocks for copper conductors Categories: Switchgear and controlgear. Low voltage Comment resolution begins : 2024-06-12	Comment resolution
BS EN IEC 60947-5-7	Low-voltage switchgear and controlgear. Control circuit devices and switching elements. Requirements for proximity devices with analogue output Categories: Switchgear and controlgear. Low voltage Approval begins : 2024-03-11	Approval
BS EN IEC 60947-5-5 Ed 2	BS EN 60947-5-5 Ed 2 Low-voltage switchgear and controlgear -. Part 5-5; Control circuit devices and switching elements - Electrical emergency stop device with mechanical latching function Categories: Electrical accessories. Other \| Switchgear and controlgear. Low voltage Public comment begins : 2024-08-16	Public comment

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.
PD IEC/TR 63054:2017	Low-voltage switchgear and controlgear. Fire risk analysis and risk reduction measures Categories: Switchgear and controlgear. Low voltage Published standard begins : 2017-09-04	Published standard
PD IEC/TR 63042-100:2016	UHV AC transmission systems. General information Categories: Power transmission and distribution networks. General Published standard begins : 2017-01-04	Published standard
PD IEC/TR 61912-2:2009	Low-voltage switchgear and controlgear. Over-current protective devices. Selectivity under over-current conditions Categories: Switchgear and controlgear. General \| Switchgear and controlgear. Low voltage Published standard begins : 2009-07-06	Published standard
PD IEC TS 63208:2020	Low-voltage switchgear and controlgear. Security aspects Categories: Switchgear and controlgear. Low voltage Published standard begins : 2020-03-30	Published standard
PD IEC TS 63058:2021	Switchgear and controlgear and their assemblies for low voltage. Environmental aspects Categories: Environment and environmental protection. General \| Switchgear and controlgear. Low voltage Published standard begins : 2021-01-27	Published standard
PD IEC TS 60947-7-5:2021	Low-voltage switchgear and controlgear. Ancillary equipment. Terminal blocks for aluminium conductors Categories: Switchgear and controlgear. Low voltage Published standard begins : 2021-12-10	Published standard
PD IEC TR 63434:2023	Low voltage switchgear and controlgear. Partial discharge voltages and PD-level in low voltage switchgear and controlgear Categories: Switchgear and controlgear. Low voltage Published standard begins : 2023-10-03	Published standard
DD IEC/TS 62091:2003	Low-voltage switchgear and controlgear. Controllers for drivers of stationary fire pumps Categories: Switchgear and controlgear. Low voltage Published standard begins : 2003-09-04	Published standard
BS EN IEC 62026-1:2019	Low-voltage switchgear and controlgear. Controller-device interfaces (CDIs). General rules Categories: Switchgear and controlgear. Low voltage Published standard begins : 2019-07-19	Published standard
BS EN IEC 60947-9-1:2019	Low-voltage switchgear and controlgear. Active arc-fault mitigation systems. Arc quenching devices Categories: Switches \| Switchgear and controlgear. Low voltage Published standard begins : 2019-06-14	Published standard

Withdrawn (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.
PD IEC TR 63216:2019	Low-voltage switchgear and controlgear. Electromagnetic compatibility assessment for switchgear and controlgear and their assemblies Categories: Switchgear and controlgear. Low voltage Withdrawn begins : 2020-10-02	Withdrawn
PD IEC TR 63201:2019	Low-voltage switchgear and controlgear. Guidance for the development of embedded software Categories: Switchgear and controlgear. Low voltage Withdrawn begins : 2020-10-02	Withdrawn
BS EN IEC 60947-6-2:2023	Low-voltage switchgear and controlgear. Multiple function equipment. Control and protective switching devices (or equipment) (CPS) Categories: Industrial process measurement and control \| Switches \| Switchgear and controlgear. Low voltage \| Multilayer applications Withdrawn begins : 2023-03-09	Withdrawn
BS EN IEC 60947-5-2:2020+A11:2022	Low-voltage switchgear and controlgear. Control circuit devices and switching elements. Proximity switches Categories: Switches \| Switchgear and controlgear. Low voltage Withdrawn begins : 2023-01-23	Withdrawn
BS EN IEC 60947-4-1:2019	Low-voltage switchgear and controlgear. Contactors and motor-starters. Electromechanical contactors and motor-starters Categories: Electrical accessories. Other \| Switchgear and controlgear. Low voltage Withdrawn begins : 2020-05-20	Withdrawn
BS EN IEC 60947-3:2021	Low-voltage switchgear and controlgear. Switches, disconnectors, switch-disconnectors and fuse-combination units Categories: Switches \| Switchgear and controlgear. Low voltage Withdrawn begins : 2022-05-19	Withdrawn
BS EN IEC 60947-1:2021	Low-voltage switchgear and controlgear. General rules Categories: Switchgear and controlgear. Low voltage Withdrawn begins : 2023-04-12	Withdrawn
BS EN 62683:2015	Low-voltage switchgear and controlgear. Product data and properties for information exchange Categories: Switchgear and controlgear. Low voltage Withdrawn begins : 2017-10-24	Withdrawn
BS EN 62026-3:2015	Low-voltage switchgear and controlgear. Controller-device interfaces (CDIs). DeviceNet Categories: Interface and interconnection equipment \| Switchgear and controlgear. Low voltage Withdrawn begins : 2023-01-18	Withdrawn
BS EN 60947-8:2003+A2:2012	Low-voltage switchgear and controlgear. Control units for built-in thermal protection (PTC) for rotating electrical machines Categories: Switchgear and controlgear. Low voltage Withdrawn begins : 2023-04-13	Withdrawn

Standards Development

PEL/121/1 - Low voltage switchgear and controlgear

Committee standards activity