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 95 on systems used for protection of electrical power networks and plant, including measuring relays, devices and control equipment associated with that protection.

Committee standards activity

In Progress (17)

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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 95-530 ED1:	Measuring relays and protection equipment - Part 216-1: Digital Interface - General Requirements and Tests for Protection Functions using digital communication as input and output Categories: Engineering \| Electrical engineering \| Relays Proposal begins : 2023-01-26	Proposal
PNW 95-590 ED1:	Measuring Relays and Protection Equipment - part 216-2: Digital interface - Requirements for Binary Input-Output IED Categories: Information management \| Standardization. General rules Proposal begins : 2025-03-28	Proposal
PNW 95-590 ED1:	Measuring Relays and Protection Equipment - part 216-2: Digital interface - Requirements for Binary Input-Output IED Categories: Information management \| Standardization. General rules Proposal begins : 2025-04-03	Proposal
PD IEC/TS 60255-216-1 Ed.1.0	Measuring relays and protection equipment. Part 216-1: Digital Interface - General Requirements and Tests for Protection Functions using digital communication as input and output Categories: Unclassified documents Comment resolution begins : 2025-01-13	Comment resolution
BS IEC 60255-187-3 Ed1.0	Measuring relays and protection aquipment. - Part 187-3: Functional requirements for biased (percentage) differential relays for transmission lines) Categories: Unclassified documents Public comment begins : 2023-10-16	Public comment
BS IEC 60255-187-2 Ed1.0	. . Categories: Unclassified documents Public comment begins : 2022-10-20	Public comment
BS EN IEC 60255-27:2023/AMD 1	BS EN 60255-27:2023/Amd 1 Measuring relays and protection equipment. Part 27: Product safety requirements Categories: Relays \| Telecontrol. Telemetering Public comment begins : 2023-08-08	Public comment
BS EN IEC 60255-27:2023	Measuring relays and protection equipment. Part 27: Product safety requirements Categories: Relays Approval begins : 2022-11-11	Approval
BS EN IEC 60255-26	Measuring relays and protection equipment. - Part 26: Electromagnetic compatibility requirements Categories: Relays \| Emission \| Immunity Approval begins : 2022-11-11	Approval
BS EN IEC 60255-21 ED1	BS EN 60255-21 ED1 Measuring relays and protection equipment -. Part 21: Vibration, shock, bump and seismic tests requirements Categories: Relays Public comment begins : 2025-07-07	Public comment

Published (9)

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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 IEC/IEEE 60255-118-1:2018	Measuring relays and protection equipment. Synchrophasor for power systems. Measurements Categories: Relays Published standard begins : 2019-01-11	Published standard
BS EN IEC 60255-181:2019	Measuring relays and protection equipment. Functional requirements for frequency protection Categories: Relays Published standard begins : 2019-05-09	Published standard
BS EN IEC 60255-1:2022	Measuring relays and protection equipment. Common requirements Categories: Relays Published standard begins : 2023-02-02	Published standard
BS EN 60255-26:2013	Measuring relays and protection equipment. Electromagnetic compatibility requirements Categories: Relays \| Emission \| Immunity Published standard begins : 2014-07-28	Published standard
BS EN 60255-24:2001, IEC 60255-24:2001	Electrical relays. Common format for transient data exchange (COMTRADE) for power systems Categories: Relays Published standard begins : 2001-08-08	Published standard
BS EN 60255-151:2009	Measuring relays and protection equipment. Functional requirements for over/under current protection Categories: Relays Published standard begins : 2010-08-03	Published standard
BS EN 60255-149:2013	Measuring relays and protection equipment. Functional requirements for thermal electrical relays Categories: Relays Published standard begins : 2013-10-17	Published standard
BS EN 60255-127:2014	Measuring relays and protection equipment. Functional requirements for over/under voltage protection Categories: Relays Published standard begins : 2014-02-06	Published standard
BS EN 60255-121:2014	Measuring relays and protection equipment. Functional requirements for distance protection Categories: Relays Published standard begins : 2014-07-21	Published standard

Withdrawn (21)

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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 60255-187-1:2021	Measuring relays and protection equipment. Functional requirements for differential protection. Restrained and unrestrained differential protection of motors, generators and transformers Categories: Relays Withdrawn begins : 2023-06-19	Withdrawn
BS EN 60255-5:2001, IEC 60255-5:2000	Electrical relays. Insulation coordination for measuring relays and protection equipment. Requirements and tests Categories: Relays Withdrawn begins : 2014-06-17	Withdrawn
BS EN 60255-27:2014	Measuring relays and protection equipment. Product safety requirements Categories: Relays Withdrawn begins : 2014-06-17	Withdrawn
BS EN 60255-27:2005	Measuring relays and protection equipment. Product safety requirements Categories: Relays Withdrawn begins : 2008-05-02	Withdrawn
BS EN 60255-26:2009	Measuring relays and protection equipment. Electromagnetic compatibility requirements Categories: Relays \| Emission \| Immunity Withdrawn begins : 2014-07-28	Withdrawn
BS EN 60255-26:2005	Electrical relays. Electromagnetic compatibility requirements for measuring relays and protection equipment Categories: Relays \| Emission \| Immunity Withdrawn begins : 2010-01-11	Withdrawn
BS EN 60255-25:2000, IEC 60255-25:2000	Electrical relays. Electromagnetic emission tests for measuring relays and protection equipment Categories: Ignitability and burning behaviour. Materials and products \| Electrical engineering. General \| Cables \| Relays \| Emission Withdrawn begins : 2014-07-28	Withdrawn
BS EN 60255-22-7:2003	Electrical relays. Electrical disturbance tests for measuring relays and protection equipment. Power frequency immunity tests Categories: Relays \| Emission \| Immunity Withdrawn begins : 2014-07-28	Withdrawn
BS EN 60255-22-6:2001	Electrical relays. Electrical disturbance tests for measuring relays and protection equipment. Immunity to conducted disturbances induced by radio frequency fields Categories: Relays \| Emission \| Immunity Withdrawn begins : 2014-07-28	Withdrawn
BS EN 60255-22-5:2011	Measuring relays and protection equipment. Electrical disturbance tests. Surge immunity test Categories: Relays \| Emission \| Immunity Withdrawn begins : 2014-07-28	Withdrawn

Standards Development

PEL/95 - Measuring relays and protection systems

Committee standards activity