British Standards Institution

Sector: Sustainability

Overview: Under the direction of PEL/121, is responsible for the UK input into IEC/SC 121B Low-voltage switchgear and controlgear assemblies and CLC/SR 121 Low-voltage switchgear and controlgear assemblies.

Committee standards activity

In Progress (8)

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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 121B-175 ED1:	Low-voltage switchgear and controlgear assemblies - Internal arc-fault protection of power switchgear and controlgear assemblies (PSC-assemblies according to IEC 61439-2) Categories: Information management \| Standardization. General rules \| Engineering \| Electrical engineering \| Switchgear and controlgear \| Switchgear and controlgear. Low voltage Proposal begins : 2023-03-07	Proposal
PNW 121B-164 ED1:	Low-voltage switchgear and controlgear assemblies - Part 8: Assemblies for use in photovoltaic installations Categories: Information management \| Standardization. General rules \| Engineering \| Electrical engineering \| Switchgear and controlgear \| Switchgear and controlgear. Low voltage Proposal begins : 2022-10-11	Proposal
PD IEC/TS 61641 Ed. 1.0	Low-voltage switchgear and controlgear assemblies - Internal arc-fault protection of power switchgear and controlgear assemblies (PSC-assemblies accordingto IEC 61439-2) Categories: Unclassified documents Comment resolution begins : 2025-07-23	Comment resolution
BS EN IEC 61439-8 Ed.1.0	BS EN 61439-8 Ed.1.0 Low-voltage switchgear and controlgear assemblies -. Part 8: Assemblies for use in photovoltaic installations Categories: Switchgear and controlgear. Low voltage Comment resolution begins : 2025-10-06	Comment resolution
BS EN IEC 61439-6 Ed 2.0	BS EN 61439-6 Ed 2.0 Low-voltage switchgear and controlgear assemblies -. Part 6: Busbar trunking systems (busways) Categories: Switchgear and controlgear. Low voltage Public comment begins : 2023-09-14	Public comment
BS EN IEC 61439-4	Low-voltage switchgear and controlgear assemblies. Particular requirements for assemblies for construction sites (ACS) Categories: Switchgear and controlgear. Low voltage Approval begins : 2023-11-10	Approval
BS EN IEC 61439-2:2021/prAA	Low-voltage switchgear and controlgear assemblies. - Part 2: Power switchgear and controlgear assemblies Categories: Switchgear and controlgear. Low voltage Public comment begins : 2023-11-27	Public comment
BS EN IEC 61439-1:2021/prAA	Low-voltage switchgear and controlgear assemblies. - Part 1: General rules Categories: Switchgear and controlgear. Low voltage Public comment begins : 2023-11-27	Public comment

Published (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 61641:2014	Enclosed low-voltage switchgear and controlgear assemblies. Guide for testing under conditions of arcing due to internal fault Categories: Switchgear and controlgear. Low voltage Published standard begins : 2015-06-17	Published standard
PD IEC TS 63290:2024	Supplementary requirements for intelligent assemblies Categories: Switchgear and controlgear. Low voltage Published standard begins : 2024-11-29	Published standard
PD IEC TS 63107:2020	Integration of internal arc-fault mitigation systems in power switchgear and controlgear assemblies (PSC assemblies) according to IEC 61439-2 Categories: Switchgear and controlgear. Low voltage Published standard begins : 2020-05-07	Published standard
PD IEC TR 63196:2020	Switchgear and controlgear and their assemblies for low voltage. Energy efficiency Categories: \| Switchgear and controlgear. Low voltage Published standard begins : 2020-02-12	Published standard
PD IEC TR 61439-0:2022	Low-voltage switchgear and controlgear assemblies. Guidance to specifying assemblies Categories: Switchgear and controlgear. Low voltage Published standard begins : 2022-09-08	Published standard
PD IEC TR 60890:2022	A method of temperature-rise verification of low-voltage switchgear and controlgear assemblies by calculation. Part 0: Guidance to specifying assemblies Categories: Switchgear and controlgear. Low voltage Published standard begins : 2022-11-17	Published standard
BS EN IEC 62208:2023	Empty enclosures for low-voltage switchgear and controlgear assemblies – General requirements Categories: Switchgear and controlgear. Low voltage Published standard begins : 2023-10-03	Published standard
BS EN IEC 61439-7:2023	Low-voltage switchgear and controlgear assemblies. Assemblies for specific applications such as marinas, camping sites, market squares, electric vehicle charging stations Categories: Switchgear and controlgear. Low voltage Published standard begins : 2023-10-09	Published standard
BS EN IEC 61439-7:2020	Low-voltage switchgear and controlgear assemblies. Assemblies for specific applications such as marinas, camping sites, market squares, electric vehicle charging stations Categories: Switchgear and controlgear. Low voltage Published standard begins : 2019-05-01	Published standard
BS EN IEC 61439-3:2024	Low-voltage switchgear and controlgear assemblies. Distribution boards intended to be operated by ordinary persons (DBO) Categories: Switchgear and controlgear. Low voltage Published standard begins : 2024-12-03	Published standard

Withdrawn (5)

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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 61439-5:2023	Low-voltage switchgear and controlgear assemblies. Assemblies for power distribution in public networks Categories: Switchgear and controlgear. Low voltage Withdrawn begins : 2025-03-05	Withdrawn
BS EN IEC 61439-1:2021	Low-voltage switchgear and controlgear assemblies. General rules Categories: Switchgear and controlgear. Low voltage Withdrawn begins : 2022-08-25	Withdrawn
BS EN 61439-5:2015	Low-voltage switchgear and controlgear assemblies. Assemblies for power distribution in public networks Categories: Switchgear and controlgear. Low voltage Withdrawn begins : 2015-10-08	Withdrawn
BS EN 61439-2:2011	Low-voltage switchgear and controlgear assemblies. Power switchgear and controlgear assemblies Categories: Switchgear and controlgear. Low voltage Withdrawn begins : 2024-07-17	Withdrawn
BS EN 61439-1:2011	Low-voltage switchgear and controlgear assemblies. General rules Categories: Switchgear and controlgear. Low voltage Withdrawn begins : 2024-07-17	Withdrawn

Standards Development

PEL/121/2 - Low voltage switchgear and controlgear assemblies

Committee standards activity