IEC - International Electrotechnical Commission

IEC PAS 61850-90-28:2026, which is a Publicly Available Specification, specifies the expected behavior and associated documentation related to the validation of received GOOSE and SV messages. It considers engineering rules and guidance to ensure that the communication configuration process is well designed for this validation. Conformance statements related to this validation are also considered.
This document considers subscribers claiming conformance to latest editions of the IEC 61850 series in combination with publishers claiming conformance to any previous version and revision of the IEC 61850 series.

IEC TS 61400‑28-2:2026 addresses the decommissioning and preparation for recycling of wind turbines.
This scope includes all the tasks and on-site considerations of the different process steps, from the beginning of the dismantling phase, material preparation and arrangement, and preparation for shipment to re-using or recycling facilities. Wind turbines in the context of this document include blades, hubs, nacelles, towers, foundations, generators, gearboxes, cables, electrical equipment, transformers, and any other equipment that can be dismantled from wind turbines and not listed before.
The purpose of this document is to define the framework conditions of decommissioning and preparation for recycling of wind turbines, which includes the tasks and considerations of each of the steps of the process. The objective is to provide basic high-level information on the sustainable and efficient decommissioning and dismantling arrangements for wind turbines.
This document can be used by manufacturers, asset owners, governments, operators, recyclers and personnel involved in the decommissioning and preparation for recycling of wind turbines.

IEC 60695-1-14:2026 provides guidance about the levels of power and energy that could cause ignition and fire in a low voltage electrotechnical product. It can be used by Product Committees to determine what fire hazard safeguards can be used, based on the electrical energy that could be dissipated as heat.
This document deals with products used in normal atmospheres commonly available in the home and does not deal with special locations such as those in explosive atmospheres. It is intended as guidance to IEC committees, and is intended be used with respect to their individual applications.
This basic safety publication, focusing on safety guidance, is primarily intended for use by TCs in the preparation of safety publications in accordance with the principles laid down in IEC GUIDE 104 and ISO/IEC Guide 51.
This first edition cancels and replaces the first edition of IEC TS 60695-1-14 published in 2017.
This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) Conversion from a Technical Specification to an International Standard;
b) Improved clarification on when the classification of Figure 1 (power/time limits) and Figure
2 (time limits) can be used;
c) Updated normative references.

IEC 60095-8:2026 is applicable to lead acid batteries with a nominal voltage of 12 V, for automobile passenger cars applications, used as auxiliary energy storage and power source in vehicles, but not featuring the classical function of engine starting or cranking. This includes applications in battery-electric vehicles, as well as in vehicles with an internal combustion engine (ICE) that is started by another (12 V, 48 V or high-volt) battery. This document can be used for batteries with auxiliary or backup purposes.
This document specifies:
– the general requirements; and
– the essential functional characteristics, relevant test methods and results required for several classes of batteries in accordance with:
• the general type of application;
• the type of product; and
• the categories as defined in 4.1.

IEC 62305-2:2024 is applicable to the risk management of a structure due to lightning flashes to earth.
Its purpose is to provide a procedure for the evaluation of such a risk. Once an upper tolerable limit for the risk has been selected, this procedure provides a means for the selection of appropriate protection measures to be adopted to reduce the risk to or below the tolerable limit.
This third edition cancels and replaces the second edition, published in 2010. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) The concept of a single risk, to combine loss of human life and loss due to fire, has been introduced.
b) The concept of frequency of damage that can impair the availability of the internal systems within the structure has been introduced.
c) The lightning ground strike-point density NSG has been introduced replacing the lightning flash density NG in the evaluation of expected average annual number of dangerous events.
d) Reduction of a few risk components can be achieved by the use of preventive temporary measures activated by means of a thunderstorm warning system (TWS) compliant with IEC 62793. The risk of direct strike to people in open areas has been introduced, considering the reduction of that risk using a TWS.
The content of the corrigendum 1 (2024-10) has been included in this copy.

IEC/IEEE 62704-1:2026 defines the methodology for the application of the finite-difference time domain (FDTD) technique when used for determining the peak spatial-average specific absorption rate (psSAR) in the human body exposed to wireless communication devices with known uncertainty. It defines methods to validate the computational model of the device under test (DUT) and to assess its uncertainty when used in SAR simulations. Moreover, it defines procedures to determine the psSAR in a cubical volume and to verify the correct implementation of the FDTD simulation software. The applicable frequency range is 100 kHz to 10 GHz.
This document does not recommend specific SAR limits; these are found elsewhere, for example, in the guidelines published by the International Commission on Non-Ionizing Radiation Protection (ICNIRP) or in IEEE Std C95.1.
This second edition cancels and replaces the first edition published in 2017. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) specification of a SAR averaging algorithm for the calculation of the psSAR from computational results for arbitrarily shaped homogeneous phantoms, which avoids inconsistencies with respect to the algorithm for SAR averaging algorithm specified in IEC/IEEE 62209-1528 for SAR measurement methods;
b) provision of SHA-256 checksums for all supplemental files;
c) addition of brief informative discussion on developmental stages of IEC and IEEE computational modelling standards for SAR evaluations.

IEC 63182-9:2026 specifies the dimensions that are of importance for mechanical interchangeability for a preferred range of ellipse-cores made of metallic magnetic powder, and gives guidelines on allowable limits of surface irregularities applicable to ellipse-cores.
This document is a specification useful in the negotiations between magnetic powder core suppliers and users about surface irregularities.
The use of "derived" standards which give more detailed specifications of component parts while still permitting compliance with this document is discussed in Annex A.

IEC 60079-1:2026 contains specific requirements for the construction and testing of Ex Equipment and Ex Components with the Type of Protection flameproof enclosure "d", intended for use in explosive gas atmospheres.
This document supplements and modifies the general requirements of IEC 60079‑0. Where a requirement of this document conflicts with a requirement of IEC 60079‑0, the requirement of this document takes precedence.
This eighth edition constitutes a technical revision. Refer to the Foreword of the document for a complete listing of the technical changes between edition 8.0 and the previous edition of the document.
Users of this document are advised that interpretation sheets clarifying the interpretation of this document can be published. Interpretation sheets are available from the IEC webstore and can be found in the "history" tab of the page for each document.

Covers terms which are specifically relevant to telecontrol techniques as well as other terms which are necessary for the understanding of telecontrol standards. Is a technical report of type 3.

IEC TR 62786-101:2026 provides the principles and general technical characteristics of gravity energy storage systems (GESS) connected to the distribution network. It provides a reference for the planning, design, grid connection and operation of GESS. It includes an introduction to GESS, grid-connection methods, grid-connected characteristics, grid-connected operation and grid-connected testing and so on.
GESS can use liquid or solid mediums for storing or releasing energy. For example, traditional pumped storage utilizes liquid water to achieve energy storing or releasing. This document only focuses on the solid GESS, which utilize solid materials (such as concrete, slag, construction waste, etc.) for energy storage. Generally, GESS can be classified as vertical GESS and slope GESS. In the GESS, the motor-generators (MG) that are directly connected, or indirectly connected to the low voltage (LV) or medium voltage (MV) distribution network through converters, transfer the energy between the mass blocks and the grid. This document reports the grid-connection method, active power response characteristic, response of active power to frequency, response of reactive power to voltage and test of direct grid connection through synchronous motor-generator (SMG), as a supplement to IEC TS 62786-1:2023.
This document describes the interface arrangement for the connection of GESS to distribution networks with the nominal frequency of 50 Hz or 60 Hz.

IEC 61290-3-2:2026 applies to all commercially available optical amplifiers (OAs), including OAs using optically pumped fibres (i.e. optical fibre amplifiers (OFAs) based on either rare-earth doped fibres or on the Raman effect), semiconductor optical amplifiers (SOAs), and planar waveguide optical amplifiers (PWOAs).
This document defines requirements for accurate and reliable measurements of the noise figure parameters of OAs by means of the electrical spectrum analyser (ESA) method. The noise figure parameters of OAs are defined in IEC 61291-1.
This edition includes the following significant technical changes with respect to the previous edition:
a) shortening and clarification of the scope in Clause 1;
b) update of the normative references in Clause 2;
c) deletion of duplicate instructions in 7.2 to measure the time-average input power;
d) deletion of unused symbols in 3.3 and addition of new symbol.

IEC 60068-2-64:2026 demonstrates the adequacy of a specimen to resist dynamic loads without unacceptable degradation of its functional and structural integrity (or either of them) when subjected to the specified random vibration test requirements. Broadband random vibration can be used to identify accumulated stress effects and the resulting mechanical weakness and degradation in the specified performance. This information, in conjunction with the relevant specification, can be used to assess the acceptability of specimens. This third edition cancels and replaces the second edition, published in 2008, and Amendment 1:2019. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) update of Annex A with references to examples;
b) introduction of an organizational deviation treatment;
c) clarification on requirements.

IEC 62906-5-8:2026 specifies the standard measurement conditions and methods of scanning characteristics for raster-scanning laser display which uses a MEMS mirror as optical scanner and is designed for projection onto a flat screen.

IEC TS 63202:2026 defines a hot water soaking test to determine whether crystalline silicon photovoltaic (PV) cells have metallization that is durable enough to be used in PV modules.
It is applied to crystalline silicon PV cells whose metallization is made with conductive metal pastes.
Hot water soaking test is an accelerated aging test carried out using conditions of high temperature and humidity. This test can be used to identify cells with poor metal adhesion. Such cells shed some of their metal during delivery and storage, causing visual defects and potential risk of module reliability issues.

IEC PAS 61400-60:2026 will be applied to existing models already in use within the wind energy sector, as well as to future models (and updates of models) that will be used within the wind energy sector. As such, this document does not set specific requirements to model accuracy and precision but aims to transparently establish the performance of models in terms of accuracy and precision, both for the intended use as covered by measurements as well as the predictive capability of the model.
This document (and all documents under IEC PAS 61400-60 (all parts) aims at model validation but not model development. Specifically, this document further defines the model validation requirements in the following standards and operational documents:
- IEC 61400-1:2019,
- IEC 61400-5:2020,
- IEC 61400-27-2:2020,
- OD-501:2018 [2],
- OD-501:2022 [3],
- IECRE Clarification sheet CSH022 Ed 2.0

IEC 63068-5:2026 provides definitions and guidance in use of X-ray topography inspection system for detecting defects in silicon carbide (SiC) homoepitaxial wafers. Additionally, this document exemplifies X-ray topographic images to enable the detection and categorization of defects in SiC homoepitaxial wafers.

IEC 63516:2026 defines the test method for providing uniform quality fixed folding durability test data to opto-electric wiring users. In particular, it provides a test condition for the tension and free tension folded state of the flexible opto-electric circuit boards of optic fibre type.

IEC TR 60086-7:2026, which is a technical report, provides a procedure to indirectly assess coin cells for their potential to cause internal injury if ingested.

IEC TR 63676-1:2026 describes the system overview of external visual systems of external human - machine interfaces (eHMIs). These systems are specifically designed for use in automated vehicles. It provides an introduction and background information on the concept of eHMIs, highlighting their significance in the context of automated vehicles. Additionally, it describes the architecture and key components of external visual systems used in eHMI multimedia systems.
It does not deal with:
a) external display usage scenario;
b) UX and UI of external display;
c) hardware performance of eHMI;
d) eHMI regulation of automated vehicle;
e) special vehicle conditions that use eHMI external displays, such as trucks, ambulances, fire engines, buses, and taxis.

This document is published as a dual logo standard and is applicable for the explosion protection requirements for the construction, testing and marking for Group I Ex Equipment that can be an individual item, or be an assembly of multiple items of Ex Equipment and Ex Components forming mining machinery. The standard atmospheric conditions (relating to the explosion characteristics of the atmosphere) under which it can be assumed that Ex Equipment can be operated are: - temperature −20 °C to +60 °C; - pressure 80 kPa (0,8 bar) to 110 kPa (1,1 bar); and - air with normal oxygen content, typically a volume fraction of 21 %. This part of ISO/IEC 80079 applies for Ex Equipment and Ex Components with Explosion Protection Levels (EPLs) Ma and Mb. This document supplements and modifies the general requirements of IEC 60079‑0. Where a requirement of this document conflicts with a requirement of IEC 60079-0, the requirement of this document takes precedence. This document can be used for guidance on underground applications where firedamp or coal dust can be present, but which are not Group I mines, for example tunnels. This second edition cancels and replaces the first edition, published in 2016. This edition constitutes a technical revision. Refer to the Foreword of the document for a complete listing of the technical changes between edition 2.0 and the previous edition of the document.

IEC 60598-2-24:2026 specifies requirements for luminaires for which limited surface temperatures are provided to counteract risks from combustible dusts (conductive or non‑conductive) or ignition of materials that can be deposited on luminaires. The luminaires are for use with electric light sources on supply voltages not exceeding 1 000 V. This document specifically excludes requirements for luminaires for use in explosive gas atmospheres and explosive dust atmospheres. This third edition cancels and replaces the second edition, published in 2013. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) the clause numbers and structure have been aligned with those of IEC 60598‑1;
b) improved terms and definitions;
c) more detailed classification of luminaires;
d) indication of luminaire mounting positions and use locations;
e) thermal protection of built-in controlgear and other built-in devices required.

IEC 60674-3-1:2026 gives the requirements for biaxially oriented polypropylene film having a smooth or rough surface, corona treated when required for vacuum metallization. The films are for use as dielectric in capacitors. Materials which conform to this specification meet established levels of performance. However, the selection of a material by a user for a specific application is based on the actual requirements necessary for adequate performance in that application and not based on this specification alone. Safety warning: It is the responsibility of the user of the methods contained or referred to in this document to ensure that they are used in a safe manner.
This third edition includes the following significant technical changes with respect to the previous edition:
a) this document has been completely revised editorially and technically;
b) the ranges of film thickness have been expanded;
c) the requirements of characteristics with the films of expanded thickness have been added.

IEC 61300-2-50: 2026 describes a test to quantitatively assess the capability of a connector terminating a reinforced cable of any diameter or a buffered fibre, both single-mode and multimode, to withstand static loads without uncoupling of the connector, physical damage to the assembly or permanent degradation of optical performance.
This edition includes the following significant technical changes with respect to the previous edition:
a) addition of normative references to Clause 2;
b) addition of the terms and definitions clause;
c) addition of the straight pull test of pulling cap – plug – cable configuration;
d) modification of the test procedure including provisions for hardened connectors;
e) update of the severity of the test according to the component and performance category;
f) addition of the details to be specified and reported clause.

IEC TR 62899-304-2:2026 provides information on methods for determining the sample temperature during the thermal treatment process in the production of PE products.
This document also compares the characteristics of contact and non-contact temperature measurement methods.

IEC 60622:2026 specifies marking, designation, dimensions, tests and requirements for sealed nickel-cadmium prismatic secondary single cells, and battery systems made of them for use in industrial applications.
IEC 60622:2026 specifies marking, designation, dimensions, tests and requirements for sealed nickel-cadmium prismatic secondary single cells, and battery systems made of them for use in industrial applications.
This fourth edition cancels and replaces the third edition published in 2002.
This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) optional characterization of cells designed for performances at very low or very high temperature, or both;
b) optional characterization of cells tested with CCCV charge (also known as IU curve);
c) optional characterization of cells designed for rapid charge;
d) optional characterization of cells designed for high cycling.

IEC 62862-3-5:2026 specifies laboratory methods to measure reflectance of all types of reflectors for use in concentrating solar thermal (CST) plants.

IEC 60794-1-127: 2026 defines the test procedures used to establish uniform requirements for mechanical performance - Indoor simulated installation test. It applies to optical fibre cables for use with telecommunication equipment and devices employing similar techniques, and to cables having a combination of both optical fibres and electrical conductors.
Throughout this document the wording “optical cable” can also include optical fibre units, microduct fibre units, etc.
This edition includes the following significant technical changes with respect to Method E27 of IEC 60794-1-21:2015, and 60794-1-21:2015/AMD1:2020:
a) addition of a new Clause “11 Details to be reported.”

IEC 63086-2-2:2026 specifies test methods for measuring the performance of electrically powered household and similar air cleaners intended for the reduction of gas-phase pollutants.
This document is intended for measuring the reduction of the concentration of specific gas-phase pollutants. This does not necessarily correlate with the reduction of odour intensity in the case of odorous gas-phase pollutants. Such a reduction can only be tested by olfactory tests, which are not part of this document.

IEC 60127-6:2023 is applicable to fuse-holders for miniature cartridge fuse-links according to IEC 60127-2, sub-miniature fuse-links according to IEC 60127-3, universal modular fuse-links to IEC 60127-4 and miniature fuse-links for special applications to IEC 60127-7 for the protection of electric appliances, electronic equipment and component parts thereof, normally intended for use indoors.
NOTE Requirements for fuse-holders for miniature fuse-links complying with IEC 60127-4 and IEC 60127-7 are under consideration. It does not apply to fuse holders for fuses completely covered by the subsequent parts of IEC 60269-1.

IEC 62817:2014 is a design qualification standard applicable to solar trackers for photovoltaic systems, but may be used for trackers in other solar applications. The standard defines test procedures for both key components and for the complete tracker system. In some cases, test procedures describe methods to measure and/or calculate parameters to be reported in the defined tracker specification sheet. In other cases, the test procedure results in a pass/fail criterion. This standard ensures the user of the said tracker that parameters reported in the specification sheet were measured by consistent and accepted industry procedures. The tests with pass/fail criteria are engineered with the purpose of separating tracker designs that are likely to have early failures from those designs that are sound and suitable for use as specified by the manufacturer.

IEC 60601-2-4:2010 establishes particular basic safety and essential performance requirements for cardiac defibrillators. This third edition cancels and replaces the second edition published in 2002. This edition constitutes a technical revision, revised to structurally align it with IEC 60601-1:2005 and to implement the decision of IEC SC 62A that the clause numbering structure of particular standards written to IEC 60601-1:2005 would adhere to the form specified in ISO/IEC Directives, Part 2:2004. The aim of this third edition is to bring this particular standard up to date with reference to the third edition of the general standard through reformatting and technical changes.

IEC 60695-1-12:2026 specifies methodologies of fire safety engineering for electrotechnical products by providing:
- an explanation of the principles and uses of fire safety engineering;
- guidance on the use of fire safety engineering in the design of electrotechnical products;
- fire safety engineering terminology, and concepts;
- an indication of properties, data and tests needed for input into fire safety engineering assessment; and
- informative references.
This document is intended to provide guidance for product committees on fire safety engineering methods and performance-based tests for use in performance-based designs and fire hazard assessments of electrotechnical materials, assemblies, products and systems. More detailed information on fire safety engineering is contained in ISO 23932‑1. This basic safety publication focusing on safety guidance is primarily intended for use by committees in the preparation of safety publications in accordance with the principles laid down in IEC Guide 104 and ISO/IEC Guide 51. This second edition cancels and replaces the first edition published in 2015. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) whole text is renewed to contain the most recent technologies of fire safety engineering mainly developed by ISO/TC92 Fire safety SC4 Fire safety engineering.
b) Annex A is changed to show example of application of FSE in an international standard.

ISO/IEC TR 30189-2:2026 describes the use cases for IoT-based management of tangible cultural heritage assets, which builds upon the framework provided in ISO/IEC TR 30189-1:2025.

ISO/IEC 11801-6:2017 specifies generic cabling within premises that comprise single or multiple buildings on a campus. It covers balanced cabling and optical fibre cabling. The contents of the corrigendum of April 2018 have been included in this copy.

IEC 62153-4-17:2018 applies to the testing of the reduction factor of multi-element metallic cables used in analogue and digital communication and control. The described method is generally applicable to all screened metallic cables.
The reduction factor describes the screening effectiveness of a cable screen at frequencies below 1 kHz with a ratio of voltages describing the screened and unscreened situation. During the measurement, the cable under test is connected to a specific current loop arrangement.

IEC 63584-210:2026 The Open Charge Point Protocol (OCPP) provides the communication between a Charging Station and a Charging Station Management System (CSMS) and is designed to accommodate any type of charging technique.
It is based on Open Charge Point Protocol 2.1 and was submitted as a Fast -Track document.
This second edition cancels and replaces the first edition published in 2025. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) part 5 and 6 have been introduced, which contain the certification profiles responsible for the test cases;
b) resolved issues and added clarifications to the specification, most of which are related to newly in OCPP 2.1 introduced features like; DER control, V2X, ISO 15118-20, based on lessons learned from the market;
c) all OCPP 2.0.1 errata also have been incorporated into OCPP 2.1, due to the versions being backwards-compatible.

IEC 60794-1-102:2026 specifies the test procedures used to establish uniform requirements on abrasion resistance for optical fibre cables.
This document applies to optical fibre cables for use with telecommunication equipment and devices employing similar techniques, and to cables having a combination of both optical fibres and electrical conductors.
Method E2A evaluates the ability of the sheath to resist abrasion; method E2B evaluates the ability of cable markings (include text or graphic markers, and continuous coloured lines on cable) to resist abrasion.
This first edition of IEC 60794-1-102 cancels and replaces Method E2 of the first edition of IEC 60794-1-21 published in 2015.
This edition includes the following significant technical changes with respect to the previous edition:
a) addition of sample surface cleaning requirements;
b) addition of the number of tests to be performed for method E2B;
c) addition of details to be reported.

IEC 60953-4:2026 is intended to establish a Supplementary Standard for routine test of steam turbines. The rules given in this document follow the guidance given in IEC 60953-0, but contain amendments and supplements regarding the analysis and supervision of relative performance by routine testing of steam turbine.
General principles for the preparation, performance evaluation, trends of performance parameters and the determination of the measurement uncertainty of periodic routine tests are given in this document.
This document is applicable to routine testing covering a wide range of accuracy on steam turbines of every type, rating and application, operating with superheated or saturated steam.
This document is not intended for application in acceptance tests of new units or retrofits and its application for such is strongly not recommended.
The purpose of this document is to cover the existing steam turbine components which influence the efficiency of the power plant. This document helps the parties determine the most appropriate parameters that characterize the relative performance change and that could be used as long-term performance monitoring and analysis.

IEC 63087:2026 sets out the requirements for the provision of assistive listening systems (ALS) in places or situations where there is a benefit for hearing-aid, cochlear implant, and other hearing device users, compared to listening to the acoustic signal directly at that location.
This document applies to all ALS used for communication, entertainment, or educational purposes in public, private, domestic and public transport installations.
This document does not apply to other forms of audio transmission, for example simultaneous interpretation or audio description or audio-streams other than those broadcast as part of an ALS. However, this document provides useful ancillary information for such systems which can be applied.
Personal listening and intelligibility enhancement devices and systems are also included within the scope as they constitute a special case and incorporate some unique features and requirements (Annex C).
This document does not apply to hearing aids and medical hearing devices themselves or to speech enhancement and communication systems found in some private motor vehicles which are sometimes referred to as assistive listening.

IEC TS 60870-5-601:2015(E) describes test cases for conformance testing of telecontrol equipment, Substation Automation Systems (SAS) and telecontrol systems, including front-end functions of SCADA. The use of this part of IEC 60870 facilitates interoperability by providing a standard method of testing protocol implementations, but it does not guarantee interoperability of devices. It is expected that using this part of IEC 60870 during testing will minimize the risk of non-interoperability. The goal of this part of IEC 60870 is to enable unambiguous and standardised evaluation of IEC 60870-5 companion standard protocol implementations. The guidelines and conditions for the testing environment are described in IEC 60870-5-6. This new edition includes the following significant technical changes with respect to the previous edition:
- resolving ambiguities and inconsistencies between IEC 0870-5-101:2003 and IEC TS 60870-5-601:2006;
- enhancements and optimisation of test cases which are needed to prove conformance with IEC 60870-5-101:2003.
This publication is to be read in conjunction with IEC 60870-5-101:2003

IEC TS 60870-5-604:2016(E) describes test cases for conformance testing of telecontrol equipment, Substation Automation Systems (SAS) and telecontrol systems, including front-end functions of SCADA, using the IEC 60870-5-104 companion standard and IEC 60870-5-6, Guidelines for conformance testing for the IEC 60870-5 companion standards. The use of this part of IEC 60870 facilitates interoperability by providing a standard method of testing protocol implementations. This new edition includes the following significant technical changes with respect to the previous edition:
- resolution of ambiguities;
- refinement of some test cases to enhance operability between tested devices;
- addition of some test cases (mainly negative test cases).

IEC 63584-201:2026 The Open Charge Point Protocol (OCPP) provides the communication between a Charging Station and a Charging Station Management System (CSMS) and is designed to accommodate any type of charging technique. It is based on OCPP 2.0.1 and was submitted as a Fast-Track document.
This second edition cancels and replaces IEC 63584 published in 2024. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to IEC 63584:2024:
a) introduced clarifications/improvements to requirements, use cases and sequence diagrams based on member feedback and TWG taskgroup meetings;
b) renamed all "OCTT" references in part 5 and 6 to "Test System" based on IEC feedback;
c) structural changes to the part 6 testcase descriptions to improve readability;
d) continuous improvements to part 6 testcase descriptions based on feedback from active certification program and CWG taskgroup meetings.