EN IEC 63402-1 EUROPEANSTANDARD NORMEEUROPEENNE EUROPAISCHENORM August 2025 ICS 03.100.70; 27.015; 29.020 Supersedes EN 50491-12-1:2018 English Version Energy efficiency - Customer energy management systems Part 1:General requirements andarchitecture(IEC 63402 1:2025) Efficacite energetique - Systeme de gestion d'energie client Energieeffizienz -Energiemanagementsysteme fur Kunden - Part 1: Exigences generales et architecture (IEC 63402- - Teil 1: Allgemeine Anforderungen und Architektur (IEC 1:2025) 63402-1:2025) This European Standard was approved by CENELEC on 2025-07-31.CENELEC members are bound to comply with the CEN/CENELEC Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkiye and the United Kingdom. CENELEC European Committeefor Electrotechnical Standardization Comite Européen de Normalisation Electrotechnique Europaisches Komitee fur Elektrotechnische Normung CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels Ref. No. EN IEC 63402-1:2025 E ENIEC63402-1:2025(E) European foreword The text of document 23K/120/FDIS, future edition 1 of IEC 63402-1, prepared by SC 23K"Electrical Energy Efficiency products" of IEC/TC 23 "Electrical accessories" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 63402-1:2025. The following dates are fixed: latestdatebywhichthedocumenthastobe implemented at national (dop) 2026-08-31 level by publication of an identical national standard or by endorsement latest date by which the national standards conflictingwiththe(dow)2028-08-31 documenthavetobewithdrawn This document supersedes EN 50491-12-1:2018 and all of its amendments and corrigenda (if any) Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights. Any feedback and questions on this document should be directed to the users' national committee. A complete listing of these bodies can be found on the CENELEC website Endorsementnotice The text of the International Standard IEC 63402-1:2025 was approved by CENELEC as a European Standardwithoutanymodification. In the official version, for Bibliography, the following notes have to be added for the standard indicated: IEC 61850-7-3 NOTE Approved as EN 61850-7-3 IEC 61968 (series) NOTE Approved as EN IEC 61968 (series) IEC61970 (series) NOTE Approved as EN IEC 61970 (series) IEC 62056 (series) NOTE Approvedas EN 62056 (series) IEC 62325 (series) NOTE Approvedas ENIEC62325 (series) IEC62443 (series) NOTE Approved as ENIEC 62443 (series) IEC 63110 (series) NOTE Approved as EN IEC 63110 (series) IEC 63402-2 (series) NOTE Approved as EN IEC 63402-2 (series) 2 ENJEC63402-1 NORME EUROPEENNE EUROPAISCHE NORM EUROPEAN STANDARD Aout 2025 ICS 03.100.70;27.015;29.020 Remplace I'EN 50491-12-1:2018 Versionfrancaise Efficaciteénergétique-Systemedegestiond'énergieclient Part 1: Exigences généerales et architecture (IEC 63402- 1:2025) Energieeffizienz - Energiemanagementsysteme fur Kunden Energy efficiency - Customer energy management systems - Teil 1: Allgemeine Anforderungen und Architektur (IEC - Part 1: General re