IEC - International Electrotechnical Commission

IEC 62271-201:2026 is applicable to prefabricated solid-insulation enclosed switchgear and controlgear assemblies designed for:
– alternating current;
– rated voltages above 1 kV and up to and including 52 kV;
– service frequencies up to and including 60 Hz;
– indoor installation;
– areas limited to authorized personnel.
The assembly can include either air-insulated or fluid-filled compartments, or both.
For components installed in a solid-insulation enclosed switchgear and controlgear, this document supplements or even replaces in some cases, the requirements as stated by the individual product standards. The list of components which can be inside the solid-insulation enclosed switchgear and controlgear is not limited to the ones explicitly cited in this document. This third edition cancels and replaces the second edition published in 2014. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) aligned with the third edition of IEC 62271-200 published in 2021 and its Amendment 1 published in 2024, for structure, definitions, classifications, ratings and testing procedures, where appropriate;
b) clause numbering aligned with IEC 62271-1:2017, including the adoption of the subclause names of Clause 3;
c) in Clause 3 specific terms and definitions are added for "in service", "normal operating condition" and "normal use";
d) earthing circuit is more precisely described, including ratings and test requirements;
e) number of mechanical tests on interlocks is reduced for type testing;
f) forces to apply during type testing are better prescribed (refer to 7.102);
g) resistance measuring on main circuit is only needed before continuous current tests (as reference for routine tests) and not anymore needed after this continuous current test. Rationale for this deletion is that this measured resistance does not mean anything; as the temperature rise test was just finished, a new temperature rise test will not give new information;
h) IEC 62271-100:2021 has been taken into account in 7.101.2;
i) IEC 62271-107:2019 and IEC IEEE 62271-37-013:2021 are also considered in 7.101.2;
j) LSC category is more precisely described, including an explaining flowchart (Annex G);
k) examples not covered by the IAC test are transferred from Clause 6 to 9.103;
l) the term "assembly" is defined in Clause 3 and used as synonym for "solid-insulation enclosed switchgear and controlgear" in this document;
m) "metallic" is replaced by "metal" where applicable;
n) a 1 s rule was introduced for Criterion 4 during IAC tests regarding hot gases versus glowing particles as cause of ignition;
o) internal arc tests for switchgear with protrusions are more precisely described in Annex A;
p) partitions accessible in normal use are now PA, PB1 or PB2 instead of PI which has been removed (refer to 6.103.3)

ISO/IEC 30188:2026 specifies a general reference architecture for a digital twin system in terms of defining system fundamentals through the use of architecture views.

IEC 63223-1:2026 provides an overview of asset management, its principles and value creation options for the management of network assets in power systems.
This document can be applied to all types of network assets and by all types and sizes of power network companies. The term power network company does not necessarily refer to legally structured companies.
In this document, network assets refer mainly to the physical assets of the electrical energy network, meaning items, equipment, or systems that have potential or actual value for the electric company and are part of the power lines and substations responsible for the transmission and distribution of electrical energy. Examples of network assets that can be included in the asset portfolio of a power network company are presented in IEC 63223-2:2026, 4.2.2.

IEC 62351-8:2026 is to facilitate role-based access control (RBAC) for power system management. RBAC assigns human users, automated systems, and software applications (collectively called "subjects" in this document) to specified "roles", and restricts their access to only those resources, which the security policies identify as necessary for their roles.
As electric power systems become more automated and cyber security concerns become more prominent, it is becoming increasingly critical to ensure that access to data (read, write, control, etc.) is restricted. As in many aspects of security, RBAC is not just a technology; it is a way of running a business. RBAC is not a new concept; in fact, it is used by many operating systems to control access to system resources. Specifically, RBAC provides an alternative to the all-or-nothing super-user model in which all subjects have access to all data, including control commands.
RBAC is a primary method to meet the security principle of least privilege, which states that no subject should be authorized more permissions than necessary for performing that subject’s task. With RBAC, authorization is separated from authentication. RBAC enables an organization to subdivide super-user capabilities and package them into special user accounts' termed roles for assignment to specific individuals according to their associated duties. This subdivision enables security policies to determine who or what systems are permitted access to which data in other systems. RBAC thus provides a means of reallocating system controls as defined by the organization policy. In particular, RBAC can protect sensitive system operations from inadvertent (or deliberate) actions by unauthorized users. Clearly RBAC is not confined to human users though; it applies equally well to automated systems and software applications, i.e., software parts operating independent of user interactions.
The following interactions are in scope:
– local (direct wired) access to the object by a human user, a local and automated computer agent, or a built-in human machine interface (HMI) or panel;
– remote (via dial-up or wireless media) access to the object by a human user;
– remote (via dial-up or wireless media) access to the object by a remote automated computer agent, e.g., another object at another substation, a distributed energy resource at an end-user’s facility, or a control centre application.
While this document defines a set of mandatory roles to be supported, the exchange format for defined specific or custom roles is also in scope of this document. This is achieved by defining two different encoding approaches to handle the definition of custom roles, either based on specific permissions or based on constraints to existing permissions. The definition on handling custom based roles was started in IEC 62351-90-1 and taken over into the IEC 62351-8:2020. Moreover, additionally to the definition of custom roles based on associated permissions, this document also includes options how to assign permissions to objects in a general way. Referencing documents will provide a mapping to a concrete data model to ensure an interoperability for standard roles used in different data models as well as for custom defined roles. Referencing documents might be standards such as IEC PAS 61850-90-19 or IEC 60870-5-7:2025 or also definitions by an operator.
Out of scope for this document are all topics which are not directly related to the definition of roles and access tokens for local and remote access, especially administrative or organizational tasks, such as:
– definition of usernames and password definitions/policies;
– management of keys and/or key exchange;
– engineering process of roles;
– assignment of roles;
– selection of trusted certification authorities issuing credentials (access tokens);
– defining the tasks of a security officer;
– integrating local policies in RBAC.
Existing standards (see ANSI INCITS 359-2004,

IEC TS 62461:2026 gives guidelines for the application of the uncertainty analysis accord­ing to ISO/IEC Guide 98‑3:2008 (GUM describing an analytical method for the uncertainty determination) and its Supplement 1:2008 (GUM S1 describing a Monte Carlo method for the uncertainty determination) for measurements of ionizing radiation. It does not include the uncertainty associated with the concept of the measuring quantity, e.g., the difference between Hp(10) on the ISO water slab phantom and on the person.
This document explains the principles of ISO/IEC Guide 98‑3:2008, its Supplement 1:2008 and the special considerations necessary for radiation protection at an example taken from individual dosimetry of external radiation.
This document is intended to assist the understanding of ISO/IEC Guide 98‑3:2008, ISO/IEC Guide 98‑3-SP1:2008 and other papers on uncertainty analysis. It cannot replace these papers, nor can it provide the background and justification of the arguments leading to the concept of ISO/IEC Guide 98‑3:2008 and ISO/IEC Guide 98‑3-SP1:2008.
Finally, this document gives a very simple method to judge whether a measured result is significantly different from zero or not based on ISO 11929.
This first edition of IEC TS 62461 cancels and replaces the second edition of IEC TR 62461 published in 2015. This edition includes the following significant technical changes with respect to the previous edition:
- several minor corrections;
- the addition of an example of the determination of the decision threshold and detection limit in accordance with ISO 11929.

IEC 61373:2026 specifies the requirements for testing items of equipment intended for use on railway vehicles which are subsequently subjected to vibrations and shock owing to the nature of railway operational environment. To gain assurance that the quality of the equipment is acceptable, it is exposed to tests of reasonable duration that simulate the service conditions seen throughout its expected life.
Simulated long-life testing can be achieved in a number of ways each having their associated advantages and disadvantages, the following being the most common:
a) amplification: where the amplitudes are increased and the time base decreased;
b) time compression: where the amplitude history is retained and the time base is decreased (increase of the frequency);
c) decimation: where time slices of the historical data are removed when the amplitudes are below a specified threshold value.
The amplification method as stated in item a) above, is used in this document and together with the publications referred to in Clause 2; it defines the default test procedure to be followed when vibration testing items for use on railway vehicles.
Whilst this document is primarily concerned with railway vehicles on fixed rail systems, its wider use is not precluded. For systems operating on pneumatic tyres, or other transportation systems such as trolleybuses, where the level of shock and vibration clearly differ from those obtained on fixed rail systems, specific test levels can be considered. In that case, the frequency spectra and the shock duration and amplitude are computed in compliance with the guidelines in Annex A.
Annex F provides the functional random vibration load that can be considered by the user for urban vehicles operating on pneumatic tyres.
This document applies to single axis testing. However, multi-axis testing is possible.
The anchoring bolts at the fixing point(s) of the equipment are not evaluated in this document.
This document is intended to evaluate equipment which is attached to the main structure of the vehicle (and components mounted thereon). It is not intended to test equipment which forms part of the main structure. Main structure in the sense of this document means car body, bogie and axle.
The following items are out of scope of this document:
– the traction motors for railway vehicles;
– any mechanical substructure not equipped with electrical, electronic or pneumatic component.
Additional or special vibration tests for some specific equipment are not specified in this document, for example:
a) equipment mounted on, or linked to, items which are known to produce defined frequency excitation;
b) equipment such as pantographs, shoegear, or suspension components which are known to be exposed to specific shock and vibration excitation;
c) equipment intended for use in special operational environments as specified by the customer;
d) transportation and handling tests.
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) consideration of specific ASD spectra from onboard measurements and certification limited to the specific case;
b) exclusion from the scope of applicability of traction motors and any substructure not equipped with electrical, electronic or pneumatic device;
c) clarification for order of testing and typical test sequence, taking into account the possibility of simultaneous multi-axis testing;
d) recommendation and guidance for removing resilient mounts of the equipment (if located between the equipment and the main structure) during the long-life test;
e) qualification of the fixture device used to attach the equipment to the test bench;
f) guidance for using a measuring point as a possibility to assess mechanical integrity;
g) change of the method to calculate the acceleration ratio which shall b

IEC 61850-7-410:2026 specifies the logical node classes for use in the domain of hydroelectric power stations, steam and gas turbines.
This IEC61850 domain information model standard utilizes the existing Logical Node (LN) classes defined in IEC 61850-7-4, Basic communication structure – Compatible logical node classes and data object classes where possible, while defining new and extended domain specific LN classes to provide the necessary data objects for application to functions and systems in the domain of hydroelectric power stations, steam and gas turbines. The domain information model includes the interface towards a central operator centre’s control functions.
The Scope of this document, related to steam and gas turbine specifics, is limited to overall control functions and generator and turbine control functions. For hydroelectric power, the scope includes the entire power station automation system.
Edition 3 is intended to form a basis for extensions in local implementations. Such extensions may be defined in profiles. Many of the Logical Nodes defined in this document are designed to be suitable for use in domains beyond the scope of hydro power plants and steam and gas turbines. A suggested structure of the Logical Nodes into packages for integration with other domains is provided in Annex G (informative), Migration of this document to the future edition of IEC 61850.
This third edition cancels and replaces the second edition published in 2012 and Amendment 1:2016. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) New concepts and constructs for modelling of large power generation;
b) Addition of new Logical Nodes to cover systems and details of the power generation domain previously not modelled in a sufficient way;
c) Review of existing Logical Nodes concerning structure, use of Common Data Classes and naming;
d) Fixes and improvements of some names and descriptions of Data Objects;
e) Improvements of the structure and enumerations within the Domain Logical Nodes;
f) Addition of new Logical Nodes with respect to maintenance and supervision functionality;
g) Updating of Logical Nodes for PSS functionality (LNs: APSS, APST and APSF) reflecting the updated PSS standard IEEE 421.5:2016;
h) Incorporation of Amendment 1, including among other things the Group E Logical Nodes;
i) Resolutions to all known UML Issues related to IEC 61850-7-410;
j) This 3rd edition is autogenerated from the UML file;
k) Upon publication the updated IEC 61850-7-410 NameSpace will be made available as a Code Component on the TC57 web page.
In the Edition 3 of this document, a new modelling approach is applied. In order to achieve greater efficiency and harmonization of the IEC 61850 information model by streamlining the Namespaces it is divided into, the structure of the latest revisions of the Namespaces related to the power generation domain, aims to:
– share common concepts, approaches, and models in the generation domains,
– increase the modularity of the model itself and enable its extension.
This edition hence introduces a new modeling approach, which is further explained in Clause 5. The pillars upon which the new approach is founded are as follows:
– a layered architecture for the power station model, in accordance with the control hierarchy concepts defined in IEC 60050-351-55;
– a comprehensive review of the models considering the approach outlined in IEC 61850-7-420:2021, aimed at harmonizing fundamental concepts in the power generation domain;
– a systematic alignment with the concepts outlined in IEC 61850-7-500:2017.
Specific aspects typical of the large power generation domain are also addressed in the present document. The relationship between concepts described in this document and the ones of related standards can be found in Annex B and Annex C.
In addition to this objective, Edition 3 provides c

IEC 62674-1:2026 applies to fixed surface mount inductors and fixed surface mount ferrite beads. The object of this document is to define the terms necessary to describe the inductors covered by this document, provide recommendations for preferred characteristics, recommended performance, test methods and general guidance.
This edition includes the following significant technical changes with respect to the previous edition:
a) addition of dimensions for shape D;
b) addition of upper temperature for operating temperature ranges.

IEC TS 63346-2-2:2026 provides common rules and specific requirements for the design of low voltage DC auxiliary power systems (APSs) intended to be installed in substations, mainly covering the configuration of DC power sources, system wiring, electric equipment selection and physical layout. For the purpose of interpreting this document, a DC APS in this document is considered as follows.
Its scope covers from the low voltage AC input of the charger to the DC input points of loads. Though DC load is discussed where necessary, the load itself is beyond the scope of this document.
Unless particularly stated, DC APS refers to the system using lead-acid and nickel-cadmium cells which are connected in series. The system using parallel cells can implement this document by reference.
Substations in this document refer to those which are part of an electrical system and contain equipment that either receives and distributes electrical energy or transforms voltages to the levels required by the loads they supply, or both.
This document does not apply to the design of any of the following: traction substation, which have different power supply requirements, such as unbalanced load power supply and harmonic behaviour;
offshore substations, as factors such as waves, typhoons, salt spray, etc. need to be taken into account, which have different requirements for power supply and equipment selection; the substation connecting a nuclear power plant to the grid and its associated LV APS integrated with the nuclear power plant.

IEC 60335-2-2:2026 deals with the safety of electric vacuum cleaners and water suction cleaning appliances for household and similar purposes, their rated voltage being not more than 250 V for single phase (AC) supplied appliances, direct current (DC) supplied appliances and battery-operated appliances and 480 V for multi-phase centrally-sited vacuum cleaners. This standard also applies to vacuum cleaners for animal grooming, centrally-sited vacuum cleaners, and automatic battery-operated cleaners.
This standard also applies to spray extraction appliances in which
– the pressure of the employed liquid solution does not exceed 2,5 MPa;
– the product of the pressure (in MPa) and the flow of liquid solution (in litres per minute) do not exceed 100; and
– the temperature of the liquid solution at the spray nozzle outlet does not exceed 60 °C.
This standard also applies to vacuum cleaners and water suction cleaning appliances provided with a blowing function or inflating function.
This standard also applies to motorized cleaning heads and current-carrying hoses associated with a particular vacuum cleaner or water suction cleaning appliance.
Appliances not intended for normal household use, but which nevertheless can be a source of danger to the public, such as appliances intended to be used by laypersons in shops and other premises for normal housekeeping purposes, are within the scope of this standard.
Examples of appliances for household use are appliances for typical housekeeping functions used in the household environment that can also be used by non-expert users for typical intermittent housekeeping functions:
– in shops, schools and other similar working environments;
– in farm houses;
– by clients in hotels, motels and other residential type environments;
– in bed and breakfast type environments.
Household environments include the dwelling and its associated buildings, the garden, etc.
As far as is practicable, this standard deals with the common hazards presented by appliances that are encountered by all persons in and around the home. However, in general, it does not take into account
– persons (including children) whose physical, sensory or mental capabilities; or lack of experience and knowledge prevents them from using the appliance safely without supervision or instruction;
– children playing with the appliance.
Attention is drawn to the fact that
– for appliances intended to be used in vehicles or on board ships or aircraft, additional requirements can be necessary;
– in many countries, additional requirements are specified by the national health authorities, the national authorities responsible for the protection of labour, the national water supply authorities and similar authorities.
This standard does not apply to
– appliances intended exclusively for industrial purposes;
– appliances intended to be used in locations where special conditions prevail, such as the presence of a corrosive or explosive atmosphere (dust, vapour or gas);
– wet and dry vacuum cleaners, including power brush, for commercial use (IEC 60335-2-69);
– floor treatment and wet scrubbing machines, including rug shampooers, for household and similar use (IEC 60335-2-10);
– hand-held mains-operated garden blowers, vacuums and blower vacuums (IEC 60335 2 100, IEC 62841-4-6);
– spray extraction machines for commercial use (IEC 60335-2-68);
– high-pressure cleaners and steam cleaners (with a rated pressure not less than 2,5 MPa) (IEC 60335-2-79);
– appliances having vacuum-pressure functions for skin care (IEC 60335-2-115).
This eighth edition cancels and replaces the seventh edition published in 2019. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
– alignment with IEC 60335-1:2020;
– conversion of some notes to normative text (Clause 1);
– addition of multi-phase central vacuum cleaners to the scope (Clause 1);
–

IEC 61300-2-2:2026 evaluates the effects of a number of successive cycles of mating and un-mating of fibre optic connectors or other interconnecting devices on optical performance and mechanical degradation of the component under normal usage conditions.
This edition includes the following significant technical changes with respect to the previous edition:
a) definition of the mating durability test also for a plug-receptacle configuration of the device under test (DUT);
b) deletion of measurement condition B;
c) definition of a unique measurement condition;
d) addition of performance categories in the severities;
e) introduction of new severity levels for connectors and hardened connectors;
f) definition of new cleaning criteria during mating durability test;
g) deletion of performance category E in the severities.

IEC TS 62607-4-10:2026, which is a Technical Specification, establishes standardized methods to determine the electrochemical key control characteristics, including:
• specific capacitance, voltage maintenance rate, endurance in cycling and temperature endurance of carbon nanomaterials by determining the standard coin-type EDLC.
The electrochemical key control characteristics are derived by calculating the recording curve at the specific charging and discharging process.
• The document is applicable for coin-type EDLC assembled from carbon nanomaterials, such as nanoporous activated carbon, carbon aerogel, carbon nanotube, carbon black, graphene, nano graphite sheet, vapor-grown carbon fibre and so on.
• Typical application areas of this method are research, manufacturer and downstream use to guide material processing and quality control.

IEC 603352-120:2024 deals with the safety of appliances for generation of directly inhalable aerosols, their rated voltage being not more than 250 V for single-phase appliances, and other appliances including direct current (DC) supplied appliances and battery-operated appliances.
Examples of the appliances that are within the scope of this standard are:
- vapour and aerosol appliances;
- personal vaping appliances with or without nicotine;
- electronic cigarettes;
- electronic nicotine delivery systems (ENDS);
- electronic non-nicotine delivery systems (ENNDS);
- electronic tobacco heating appliances for heated tobacco products.
This standard does not apply to:
- medical ventilators,
- humidifiers (IEC 60335-2-98).
These requirements do not cover the consumables, such as e-liquids and other inhaled aerosol substances, wicks, and other particulate matter inhaled during use, nor do they cover substances in the emissions from the operation of the appliances. For example, heavy metal emissions in the aerosol and environmental exposure are not covered by this standard. These requirements do not consider the physiological effects of any consumable used with the appliances. This International Standard does not cover requirements or prohibitions of the labelling, packaging and contents of nicotine-containing or nicotine-consuming products that are strictly regulated by law of the relevant jurisdiction.

IEC TS 62607-4-9:2026, which is a Technical Specification, establishes a standardized method for assembling
• coin-cell EDLCs
in order to characterize the electrochemical key control characteristic of carbon nanomaterials.
The coin-cell EDLC is fabricated through sequential steps: electrode slurry preparation (mixing), coating, rolling, cutting, weighing, and final assembly.
• The document specifies the assembly process and data recording.
• The document is applicable for carbon nanomaterials used in EDLC as active material or conductive agents, such as nanoporous activated carbon, carbon aerogel, carbon nanotube, carbon black, graphene, nano graphite sheet, vapour-grown carbon fibre and so on.
• Typical application areas of this method are research, manufacturer and downstream user to guide material processing and quality control

IEC 62885-2:2026 is applicable for measurements of the performance of mains-operated and cordless dry vacuum cleaners, including water filter vacuum cleaners for household or similar use. Table D.1 of Annex D is applicable to measurements of the performance of cordless dry vacuum cleaners for household use or under conditions similar to those in households. The results obtained under this annex are intended to be comparable to the results obtained for mains-operated vacuum cleaners. The purpose of Annex D is to specify additional requirements for measurements of cordless dry vacuum cleaners. Cleaning robots are evaluated to IEC/ASTM 62885-7. Handheld dry vacuum cleaners are excluded, except for 5.10.2 and 5.11. Measurements of the performance of mains-operated commercial dry vacuum cleaners are found in IEC 62885-8. The purpose of this document is to specify essential performance characteristics of dry vacuum cleaners which are of interest to users and to describe methods for measuring these characteristics. Due to the influence of environmental conditions, variations in time, origin of test materials and proficiency of the operator, some of the described test methods will give more reliable results when applied for comparative testing of a number of appliances at the same time, in the same laboratory and by the same operator. The methods here can be applied with modifications for surface-cleaning product types or technologies not currently covered within the scope. For safety requirements, reference is made to IEC 60335-1:2020 and IEC 60335-2-2. A recommendation on information for the consumer at the point of sale is given in Annex B. This third edition of IEC 62885-2 cancels and replaces the second edition published in 2021. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) relocation of RSB annexes to IEC TS 62885-1;
b) relocation of remaining test materials, test dust, and equipment to IEC TS 62885-1;
c) reduced number of test strokes from 5 double strokes to 3 double strokes except as specifically required;
d) relocated requirements for cordless products, except for battery-related items, from IEC 62885-4 to a new Annex D;
e) added definition and instructions for a universal dry nozzle;
f) relocated air data equipment to IEC TS 62885-1, relocated formulae to 5.11, and made revisions to air data requirements;
g) relocated dust re-emission equipment to IEC TS 62885-1.

IEC 62228-7:2026 specifies test and measurement methods for the EMC evaluation of CXPI transceiver ICs under network condition. It defines test configurations, test conditions, test signals, failure criteria, test procedures, test setups and test boards. This specification is applicable for standard CXPI transceiver ICs and ICs with embedded CXPI transceiver and covers:
- the emission of RF disturbances;
- the immunity against RF disturbances;
- the immunity against impulses;
- the immunity against electrostatic discharges (ESD).
This edition includes the following significant technical changes with respect to the previous edition:
a) change transceiver terms and definitions from master to commander and slave to responder in 3.1.5 and 3.1.6.
b) change test configuration for embedded transceiver in 5.3.1 and add on Figure A.4 accordingly.
c) change the definition of TX2 test signal for Type-B transceiver in 5.4.2.
d) add examples for test limits in Annex C.

IEC TR 62271-322: 2026 describes trends and the state-of-the-art of digital technologies enabling their use in switchgear and controlgear along their life cycle. The report is a guidance for the IEC TC17 and supported by use cases or by emerging technologies, able to be implemented in power grids. The report can be used by designers, asset managers and any stakeholder dealing with interoperable and digital technologies for a switchgear and controlgear over their whole life cycle. The document consists of three main parts.
Clause 4 describes the trends in user exploitation of digital technologies within the switchgear and controlgear. Clause 5 focuses on trends regarding technology and consequences for system architectures. Clause 6 gives guidance for use of new technologies in substations.
This edition includes the following significant technical changes with respect to the previous edition:
a) IEC numbering has been modified;
b) title has been modified;
c) updates in the field of digital technologies, like Internet of Things, cloud and edge computing, digital twins, artificial intelligence and cybersecurity have been added; in accordance with the IEC strategy themes and goals;
d) synchronization and updates in the context of the latest standards of TC 17: IEC 62271-1 and IEC 62271-3;
e) Bibliography has been added.

IEC 61811-1:2015 applies to electromechanical telecom elementary relays. Relays according to this standard are provided for the operation in telecommunication applications. However, as electromechanical elementary relays, they are also suitable for particular industrial and other applications. This standard selects from IEC 61810 series and other sources the appropriate methods of test to be used in detail specifications derived from this specification, and contains basic test schedules to be used in the preparation of such specifications in accordance with this standard. Detailed test schedules are contained in the detail specifications. This second edition of IEC 61811-1 cancels and replaces IEC 61811-1 published in 1999, IEC 61811-10 published in 2002, IEC 61811-11 published in 2002, IEC 61811-50 published in 2002, IEC 61811-51 published in 2002, IEC 61811-52 published in 2002, IEC 61811-53 published in 2002, IEC 61811-54 published in 2002, IEC 61811-55 published in 2002, and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous editions:
a) to get one document for telecom relays;
b) update all relevant references.

IEC 63066:2026 applies to docking connectors (hereinafter referred to as accessories) incorporated in or fixed to electrical equipment, intended to connect energy storage units, either removable or swappable, or both, to a dedicated electric power conversion unit, to an energy consuming unit or to another energy storage unit.
These accessories are intended for DC and can include either a protective earth contact or optional auxiliary contacts for signalling and data transmission, or both. These accessories have a rated current of up to 2 000 A and rated operating voltages not exceeding 1 500 V DC.
This first edition cancels and replaces the first edition of IEC TS 63066 published in 2017. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) introduction of standard sheets;
b) alignment with IEC 60309‑1:2021;
c) technical improvements, e.g. short circuit tests according the I2t- methodology.

IEC 60076-4:2026 applies to lightning and switching impulse tests on power transformers and reactors. Information is given on waveforms, test circuits including test connections, earthing practices, failure detection methods, test procedures, measuring techniques and interpretation of results.

IEC 63223-2:2026 specifies requirements, recommendations, and examples for implementing a risk-informed decision-making (RIDM) process for managing existing network assets in power systems. The intended audience concerns power network organizations' stakeholders and decision makers, such as asset managers, risk managers, regulators, asset owners, and service providers. The RIDM process details the steps to ensure transparency, consistency, and traceability of the decision by:
- specifying the risk decision-making context depending on asset management objectives, available knowledge, and risk stakeholders' concerns;
- identifying the appropriate risk management strategies and the knowledge supporting the analyses;
- detailing the essential steps for conducting a risk analysis and justifying investments, regardless of the calculation methods used;
- providing essential information and warnings to decision makers;
- implementing performance evaluation and continuous improvement.
The document is based on the asset management principles from ISO 55000:2024 and is aligned with ISO 55001:2024. Compliance with the requirements of this document is independent of compliance with ISO 55001:2024.

IEC 62807-2:2026 is a sectional specification for hybrid communication cables used for indoor applications. It specifies terms, definitions, and abbreviated terms, the design and construction, rated values and characteristics, performance requirements and test methods, packaging and quality assurance.
Hybrid cables are designed for networks and customer premises cabling that transmit data, control and signalling services over optical fibres, copper conductors, for example coaxial element, wire/pair/quad element, and can have the option of supplying electrical current to remote equipment.
In the IEC 62807 series, the current carrying elements are used only to supply power to the equipment within the communication network. They are not used for power supply main. The specific uses are defined in the relevant specification.
The MICE classifications specified in ISO/IEC 11801-1 are fully considered when determining the performance requirements and test methods for a hybrid cable application.

IEC TS 63537:2026 addresses the requirements for hardware-in-the-loop (HIL) simulation test of power system stability control system (see definition in 3.1.2). Its purpose is to provide guidelines encompassing the use of terms and definitions, as well as the objective and general requirements for HIL simulation test. The TS covers the test requirements, test system, test contents, and test quality management. This document improves the safe and stable operation of the power system.

IEC 60940:2026 establishes general rules and safety requirements on the application of capacitors, resistors, inductors, and complete filter units for electromagnetic interference suppression which will be connected to an AC mains or other supply (DC or AC) with a nominal voltage not exceeding 1 000 V AC having a nominal frequency not exceeding 400 Hz, or 1 500 V DC.
It facilitates drafters of product safety standards and other stakeholders such as designers, manufacturers, service providers, policy makers and regulators to consider safety aspects for the intended use and the reasonably foreseeable misuse of these components in its products and systems and apply risk reduction measures to achieve a tolerable risk level.
This third edition includes the following significant technical changes with respect to the previous edition:
a) new title to change the document from “guidance” into “general rules and safety requirements;
b) new content added (Clause 5 to Clause 9);
c) the previous edition is partly contained in Clause 4.

IEC 60079-10-2 is concerned with the identification and classification of areas where explosive dust atmospheres and combustible dust layers are present in order to permit the proper assessment of ignition sources in such areas. In this document, explosive dust atmospheres and combustible dust layers are treated separately. In Clause 4, area classification for explosive dust clouds is described, with dust layers acting as one of the possible sources of release. In Clause 7, other general considerations for dust layers are described. The examples in this document are based on a system of effective housekeeping being implemented in the plant to prevent dust layers from accumulating. Where effective housekeeping is not present, the area classification includes the possible formation of explosive dust clouds from dust layers. The principles of this document can also be followed when combustible fibres or flyings might cause a hazard.
Atmospheric conditions include variations in pressure and temperature above and below reference levels of 101,3 kPa (1 013 mbar) and 20 °C (293 K), provided that the variations have a negligible effect on the explosive properties of the combustible material. For air with normal oxygen content, typically a volume fraction of 21 % is assumed.
It does not apply to:
a) underground mining areas;
b) dusts of explosives that do not require atmospheric oxygen for combustion such as pyrophoric substances, propellants, pyrotechnics, munitions, peroxides, oxidizers, water‑reactive elements or compounds, or other similar materials;
c) catastrophic failures or rare malfunctions which are outside the conditions dealt with in this document;
d) rooms used for medical purposes;
e) domestic premises;
f) where a hazard is due to the presence of flammable gas or vapour, but the principles can be used in the assessment of a hybrid mixture (see also IEC 60079-10-1).
This document does not consider the effects of consequential damage following a fire or an explosion. Please refer to the foreword of the document for a detailed listing of the significant technical changes from the previous edition.

IEC TS 63427:2026 provides principles and technical requirements for the adjustment potential of demand side resources in demand side management. Demand side resources include dispatchable loads, electrical energy storage, grid-connected microgrids, and distributed energy resources, which are connected to power distribution systems and capable of adjusting their operating state and exchanging information with grid control systems. It includes the DSR characteristics, system requirements, data preparation and evaluation process.
The adjustments of demand side resources can be subject to relevant local regulations or specifications. Electricity market mechanisms, user behaviour and data privacy are excluded from the scope of this document.

IEC/IEEE 60802:2026 defines time-sensitive networking profiles for industrial automation. The profiles select features, options, configurations, defaults, protocols, and procedures of bridges, end stations, and LANs to build industrial automation networks. This document also specifies YANG modules defining read-only information available online and offline as a digital data sheet. This document also specifies YANG modules for remote procedure calls and actions to address requirements arising from industrial automation networks.

ISO/IEC 14543-4-304:2026 specifies an application-layer protocol important for ensuring interoperability among the products of various manufacturers regarding communications between electric vehicle supply equipment (EVSE) charger and dischargers and controllers. It uses the network enhanced communications device (NECD) protocol specified in ISO/IEC 14543-4-3. This protocol is based on UDP using IPv4 or IPv6 (TCP is optional).

ISO/IEC 14543-4-303:2026 specifies an application-layer protocol important for ensuring interoperability among the products of various manufacturers regarding communications between electric vehicle supply equipment (EVSE) chargers and controllers. It uses the network enhanced communications device (NECD) protocol specified in ISO/IEC 14543-4-3. This protocol is based on UDP using IPv4 or IPv6 (TCP is optional).

IEC TS 62607-6-24:2026 which is a Technical Specification, establishes a standardized method to determine the key control characteristic (KCC)
• number of layer distribution
for CVD graphene film by
• optical contrast measurement
The number of layers and number of layer distribution of CVD graphene film is derived by G‑channel contrast values.
This method is applicable for clean CVD graphene film without twisted multilayer structures on a SiO2/Si substrate.

IEC TS 63346-2-1:2026 establishes the general principles for the design of low-voltage auxiliary power systems (APS) with nominal voltages below or equal to 1 kV AC and 1,5 kV DC, and nominal frequency up to and including 60 Hz, so as to provide safe and correct operation for the intended use.
This document applies to the design of low-voltage auxiliary systems for
- substations, which are part of an electrical system, confined to a given area, mainly including ends of transmission or distribution lines, electrical switchgear and controlgear, buildings and transformers,
- converter stations,
- hydropower stations, where the gravitational energy of water is converted into electricity, and
- thermal power stations, where the thermal energy is obtained by burning fossil fuels.

IEC 60404-8-8:2017(E) defines the grades of thin non-oriented electrical steel strip and sheet in nominal thicknesses of 0,05 mm, 0,10 mm, 0,15 mm, 0,20 mm, 0,25 mm, 0,30 mm and 0,35 mm and of thin grain-oriented electrical steel strip and sheet in nominal thicknesses of 0,05 mm, 0,10 mm, 0,15 mm and 0,18 mm. In particular, it gives general requirements, magnetic properties, geometric characteristics and tolerances, technological characteristics, as well as inspection procedures.
NOTE For thin non-oriented electrical steel strip and sheet, other nominal thicknesses (i.e. 0,12 mm, 0,18 mm, 0,23 mm and 0,27 mm) can be agreed between the manufacturer and the purchaser.
This document applies to electrical steel strip and sheet supplied in the finally annealed condition in coils or sheets and intended for the construction of magnetic circuits predominantly used at frequencies in the range from 100 Hz to 10 kHz.
This edition includes the following significant technical changes with respect to the previous edition:
- extension of the range of electrical steels to include the improved grades.

IEC 60404-8-4:2022 defines the grades of cold-rolled non-oriented electrical steel strip and sheet in nominal thicknesses of 0,35 mm, 0,47 mm, 0,50 mm, 0,65 mm and 1,00 mm. In particular, it gives general requirements, magnetic properties, geometric characteristics, tolerances and technological characteristics, as well as inspection procedure. The nominal thickness 0,47 mm applies to the grades for use at 60 Hz only. This document applies to cold-rolled non-oriented electrical steel strip and sheet supplied in the fully-processed state, i.e. the final annealed condition, in coils or sheets, and intended for the construction of magnetic circuits. This document does not apply to materials supplied in the semi-processed state. This edition includes the following significant technical changes with respect to the previous edition:
- modification of terms and technical requirements concerning geometrical characteristics to be consistent with IEC 60404-9:2018;
- insertion of Table 3 - Tolerances on nominal thickness;
- change of the length of test specimen for determination of geometrical characteristics from 2 m to 1 m.

IEC 60404-8-3:2023 defines the grades of cold-rolled non-oriented electrical steel strip and sheet delivered in the semi-processed state in nominal thicknesses of 0,47 mm, 0,50 mm, 0,64 mm, 0,65 mm and 0,79 mm. It gives general requirements, magnetic properties, geometric characteristics, tolerances and technical characteristics as well as inspection procedures. The nominal thicknesses of 0,47 mm, 0,64 mm and 0,79 mm apply to the grades for use at 60 Hz only.
This document applies to cold-rolled non-oriented electrical steel strip and sheet delivered in the semi-processed state, i.e. without final heat treatment, in coils or sheets, and intended for the construction of magnetic circuits. This document does not apply to materials supplied in the fully-processed state.
These materials correspond respectively to classes B2 and C21 of IEC 60404-1.
This edition includes the following significant technical changes with respect to the previous edition:
a) Modification of terms and technical requirements concerning geometrical characteristics to be consistent with IEC 60404-9:2018;
b) Insertion of Table 3 – Tolerances on nominal thickness;
c) Change of the length of the test specimen for determination of geometrical characteristics from 2 m to 1 m;
d) Deletion of Annex A with the European numerical system of designation of steels.

IEC 60404-8-5:2020(E) defines the grades of electrical steel strip and sheet with specified mechanical properties and magnetic polarization. In particular, it gives general requirements, mechanical properties, magnetic polarization, geometric characteristics, tolerances and technological characteristics, as well as inspection procedures.
This document applies to electrical steel strip and sheet intended for the construction of poles and rims of rotating electrical machines.
The grades are grouped into two classes according to their manufacturing process:
- hot-rolled grades;
- cold-rolled grades.
They correspond to Class D21 of IEC 60404-1.
This edition includes the following significant technical changes with respect to the previous edition:
a) extension of the range of products to include the improved grades;
b) division of "flatness" into "edge wave (wave factor)" and "residual curvature" in consistent with IEC 60404-9;
c) change length of test specimen for determinations of geometrical characters from 2 m to 1 m.

IEC 60800:2021 is applicable to, and specifies requirements for resistive heating cables for low temperature applications such as comfort heating and the prevention of ice formation. These heating cables and heating cable sets can comprise either factory assembled or field (work-site) assembled units, and are heating cables assembled in accordance with manufacturer’s instructions. Bare conductors and protected conductors to be supplied at voltages equal to, or less than, 50 V are excluded from the scope of this document.
Typical applications include, but are not limited to:
- surface heating installed in or under surfaces;
- direct and storage heating;
- snow melting and frost protection of roofs, gutters, pipes, etc.
Electrical resistance trace heating systems for industrial and commercial applications are specified in the IEC 62395 series [1] and for explosive atmospheres applications in the IEC/IEEE 60079-30 series [2], as are mineral insulated heating cables. Applications in which the sheath temperature exceeds 100 °C are outside the scope of this document.

IEC 62321-13:2026 specifies three techniques for the determination of free Bisphenol A (BPA) in plastics of electrotechnical products.
This document describes the use of liquid chromatography–diode array detector (LC-DAD), liquid chromatography mass spectrometry (LC-MS), liquid chromatography tandem mass spectrometry (LC-MS/MS) with these test methods detailed in Annex A and Annex B.
These test methods have been evaluated for use with PC, PC/ABS, PP matrices containing free BPA between 20 mg/kg to 500 mg/kg as shown in the Pre-IIS 13 results in Annex C and IIS 13 results in Annex D. The use of these methods for BPA concentration ranges of plastics, other than those specified in Annex C and Annex D, has not been evaluated.
WARNING – Persons using this document should be familiar with normal laboratory practice. This document does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any national regulatory conditions.

IEC 61760-1:2026 defines requirements for component specifications of electronic components that are intended for usage in surface mounting technology. To this end, it specifies a reference set of process conditions and related test conditions to be considered when compiling component specifications. The objective of this document is to ensure that a wide variety of SMDs can be subjected to the same placement, mounting and subsequent processes (e.g. cleaning, inspection) during assembly. This document defines tests and requirements that are included in any SMD component’s general, sectional or detail specification. In addition, this document provides component users and manufacturers with a reference set of typical process conditions used in surface mounting technology. Some of the requirements for component specifications in this document are also applicable to components with leads intended for mounting on a circuit board, including solderless interconnection technology. Cases for which this is appropriate are indicated in the relevant subclauses.
NOTE Solderless interconnection technology refers to a mounting method which is not part of the surface-mounting process and the components do not undergo a soldering operation. Such components are included in this document because the mounting of components for solderless interconnection commonly occurs after the mounting of SMDs.
This edition includes the following significant technical changes with respect to the previous edition:
a) added new subclause 4.2 - Classification of electronic assemblies;
b) added new subclause 4.4.8 - Creepage and clearance distances - Insulation coordination;
c) added new subclause 4.9 - Thermal and electrical performance;
d) updated Clause 6 - Soldering: now including requirements related to application of low temperature solders;
e) added new subclause 6.2.2 - Commonly used solder alloys;
f) updated subclause 6.3.6 - Resistance to vacuum during soldering;
g) updated subclause 6.3.7 - Resistance to cleaning media and processes - now includes the tests in IEC 60068-2-88, Tests - Test XD: Resistance of components and assemblies to liquid cleaning media;
h) added new subclause 6.3.9 - Rework of soldered components;
i) added new Annex B - Sustainability.

IEC 61526:2024 applies to personal dosemeters with the following characteristics:
a) They are worn on the trunk, close to the eye, or on the extremities.
b) They measure the personal dose equivalents Hp(10), Hp(3), and Hp(0,07), from external X and gamma, neutron (not for Hp(3)), and beta radiations, and may measure the respective personal dose equivalent rates for the same radiations (for alarming purposes).
c) They have a digital indication. This indication may or may not be attached.
d) They have alarm functions for the personal dose equivalents or personal dose equivalent rates except for hybrid dosemeters. For hybrid dosemeters an alarm function for the personal dose equivalents shall be implemented in the associated readout system.
This document specifies requirements for the dosemeter and, if supplied, for its associated readout system.
This document specifies, for the dosemeters described above, general characteristics, general test procedures, radiation characteristics as well as electrical, mechanical, safety and envi­ronmental characteristics.
This edition includes the following significant technical changes with respect to the previous edition:
a) Modification of the title;
b) Inclusion of the measurement quantity for the dose in the lens of the eye, Hp(3);
c) Inclusion of measurement quantity for dose in the skin and extremities, Hp(0,07);
d) Inclusion of dosemeters between active and passive: "hybrid dosemeters";
e) Inclusion of software requirements;
f) Harmonization of requirements for linearity to IEC 62387;
g) Revised neutron energy response requirements.

IEC 60601-2-91:2026 applies to the BASIC SAFETY and ESSENTIAL PERFORMANCE of NON-THERMAL PLASMA WOUND TREATMENT EQUIPMENT and NON-THERMAL PLASMA WOUND TREATMENT ACCESSORIES.
NON-THERMAL PLASMA WOUND TREATMENT EQUIPMENT and NON-THERMAL PLASMA WOUND TREATMENT ACCESSORIES are not intended to supply heat to the PATIENT. They are used to treat chronic and acute wounds and biological tissue as well as diverse skin and itching diseases.
HAZARDS inherent in the intended physiological function of PLASMA WOUND TREATMENT EQUIPMENT and NON-THERMAL PLASMA WOUND TREATMENT ACCESSORIES within the scope of this document are covered by specific requirements in 7.2.13 of IEC 60601-1:2005, IEC 60601-1:2005/AMD1:2012 and IEC 60601-1:2005/AMD2:2020.
This document does not apply to ME EQUIPMENT intended for the haemostasis of biological tissue (see IEC 60601-2-2 and IEC 60601-2-76).