29.130.20 - Low voltage switchgear and controlgear
ICS 29.130.20 Details
Low voltage switchgear and controlgear
Kontroll- und Steuergerate fur Niederspannungen
Appareillages a basse tension
Nizkonapetostne stikalne in krmilne naprave
General Information
Frequently Asked Questions
ICS 29.130.20 is a classification code in the International Classification for Standards (ICS) system. It covers "Low voltage switchgear and controlgear". The ICS is a hierarchical classification system used to organize international, regional, and national standards, facilitating the search and identification of standards across different fields.
There are 729 standards classified under ICS 29.130.20 (Low voltage switchgear and controlgear). These standards are published by international and regional standardization bodies including ISO, IEC, CEN, CENELEC, and ETSI.
The International Classification for Standards (ICS) is a hierarchical classification system maintained by ISO to organize standards and related documents. It uses a three-level structure with field (2 digits), group (3 digits), and sub-group (2 digits) codes. The ICS helps users find standards by subject area and enables statistical analysis of standards development activities.
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- Corrigendum4 pagesEnglish languagee-Library read for1 day
IEC 61439-8:2026 specifies requirements for the design and verification of low voltage switchgear and controlgear assemblies for use in photovoltaic installations. PVAs have the following characteristics: - assemblies used for the combination of electrical energy in DC systems for which the input and output voltage does not exceed 1 500 V DC; - assemblies supplied from an AC network where the voltage does not exceed 1 000 V AC for auxiliary and control purposes; - stationary assemblies with an enclosure; - assemblies intended for operation by authorised persons (see IEC 61439 1:2020, 3.7.17), but can be located in an area accessible to ordinary persons (see IEC 61439 1:2020, 3.7.16); - suitable for indoor or outdoor installation. This document identifies definitions, specifies the service conditions, details the construction requirements, defines the technical characteristics, and provides verifications for PVAs. PVAs can also include control or signalling devices, or both, associated with the distribution of electrical energy. This document applies to all PVAs whether they are designed and manufactured on a one-off basis or fully standardized and manufactured in quantity. Either the manufacture or assembly, or both, can be carried out by an entity other than the original manufacturer (see IEC 61439 1:2020, 3.10.1). This document does not apply to: - individual devices, for example, circuit-breakers, fuse switches and self-contained components such as, motor starters, switch mode power supplies (SMPS), uninterruptable power supplies (UPS), basic drive modules (BDM), complete drive modules (CDM), adjustable speed power drives systems (PDS), stand-alone energy storage systems (battery and capacitor systems), other electronic equipment which comply with their relevant product standards, such as junction boxes of photovoltaic modules. This document describes their integration into a PVA or an empty enclosure used as a part of a PVA; - photovoltaic power conversion equipment (PCE) incorporating DC combination sub-systems, covered by the IEC 62109 series. Some applications, such as either explosive atmospheres or functional safety, or both, can be subject to the requirements of other standards or local installation rules in addition to those specified in the IEC 61439 series. This document does not apply to the specific types of assemblies covered by other parts of the IEC 61439 series.
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- Draft59 pagesEnglish languagee-Library read for1 day
IEC 62683-1:2026 establishes the reference dictionary of the general description of classes of low-voltage switchgear and controlgear and their assemblies based on defined properties. This dictionary is used to facilitate the exchange in electronic format of data describing low voltage switchgear and controlgear, their accessories and their assemblies. This document provides clear and unambiguous definitions of a limited number of properties and classes which are mainly used for presentation, selection and identification of products particularly in electronic catalogues. Each property has an unambiguously defined meaning and name, and where relevant, a defined value list, a defined format, and a defined unit. Manufacturer specific features are not covered. 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 for reflecting the content of the IEC CDD 62683DB which has been updated with the change requests C00073, C00074, C00081, C00087, C00089, C00098, C00100, C00107, C00111, C00116, C00119, C00122, C00146, C00148, C00159, C00167, C00174 and C00135:
a) New device class descriptions: ACC304, ACC305, ACC413, ACC417, ACC503, ACC504, ACC505, ACC512, ACC516, ACC536, ACC537, ACC538, ACC540, ACC541, ACC542, ACC543, ACC544, ACC545, ACC546, ACC547, ACC548.
b) New associated properties.
c) New assembly class structure: ACC101, ACC102, ACC103, ACC104, ACC106, ACC110, ACC111, ACC112, ACC113, ACC114, ACC115, ACC116, ACC117, ACC118, ACC119, ACC120, ACC121, ACC123, ACC124, ACC125, ACC126, ACC127, ACC131, ACC132, ACC133, ACC135, ACC141, ACC142, ACC143, ACC144, ACC145, ACC146, ACC147, ACC148, ACC150, ACC151, ACC152, ACC153, ACC154, ACC155, ACC156, ACC157, ACC158, ACC159, ACC160, ACC161, ACC162, ACC163, ACC164, ACC165, ACC166, ACC167, ACC170, ACC171, ACC172, ACC173, ACC174, ACC175.
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- Corrigendum4 pagesEnglish languagee-Library read for1 day
IEC 60947-6-1:2026 is available as IEC 60947-6-1:2026 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 60947-6-1:2026 applies to transfer switching equipment (TSE), to be used in power systems for ensuring the continuity of the supply and allowing the energy management of the installation, by transferring a load between power supply sources, the rated voltage of which does not exceed 1 000 V AC or 1 500 V DC. Specific requirements for bypass/isolation transfer switch equipment are given in Annex C, ATSE having closed transition capability are given in Annex D, stand-alone ATS controllers are given in Annex E, and TSE for electric driven fire pump controllers are given in Annex F.
It covers:
- manually operated transfer switching equipment (MTSE);
- remotely operated transfer switching equipment (RTSE);
- automatic transfer switching equipment (ATSE), including the controller;
- stand-alone ATS controllers;
- bypass/isolation transfer switch equipment (BTSE);
- ATSE having closed transition capability;
- fire pump TSE.
It does not cover:
- TSE configurations that are not fully manufacturer type tested or marked according to this document as a complete transfer switch;
- auxiliary contacts (for guidance, see IEC 60947-5-1);
- transfer switches used in explosive atmospheres (for guidance, see IEC 60079 (all parts));
- embedded software design (for guidance, see IEC TR 63201);
- cybersecurity aspects (for guidance, see IEC 63208);
- TSE rated for direct-on-line starting asynchronous motor of design NE and HE, according to IEC 60034-12. (for guidance, see AC-3e utilisation category according to IEC 60947 4 1);
- other types of TSE under consideration including overlapping neutral TSE, multi-source TSE (i.e. TSE with more than two sources of supply), TSE with load-shedding functions, bus-tie TSE, and hybrid TSE;
- static transfer switches covered by IEC 62310 series.
This fourth edition cancels and replaces the third edition published in 2021. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
- clarification of scope;
- clarification of terms and definitions;
- Annex C for Bypass/Isolation Transfer Switch Equipment;
- Annex D for ATSE having closed transition capability;
- Annex E for Stand-alone ATS controller;
- Annex F for TSE used with electric driven fire pump control equipment.
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This European Standard is applicable to new low voltage devices for measurement, control and protection which are:
— for indoor or outdoor fixed installations in traction systems, and
— operated in conjunction with high voltage equipment with an a.c. line voltage and frequency as specified in EN 50163.
This European Standard also applies to measurement, control and protective devices other than low voltage devices and not covered by a specific railway product standard as far as reasonably possible. Requirements of this document prevail.
Scope of amendment
Implementation of 2 technical changes:
— Modification of subclause 5.4, second item in list of protection functions.
— Aligning the value for short-circuit current of 50 Hz traction systems given in Annex A subclause A.2.1 ‘Line testing – General’ with EN 50388-1:2022 Table 7
- Amendment4 pagesEnglish languagee-Library read for1 day
IEC 61439-8:2026 specifies requirements for the design and verification of low voltage switchgear and controlgear assemblies for use in photovoltaic installations.
PVAs have the following characteristics:
- assemblies used for the combination of electrical energy in DC systems for which the input and output voltage does not exceed 1 500 V DC;
- assemblies supplied from an AC network where the voltage does not exceed 1 000 V AC for auxiliary and control purposes;
- stationary assemblies with an enclosure;
- assemblies intended for operation by authorised persons (see IEC 61439 1:2020, 3.7.17), but can be located in an area accessible to ordinary persons (see IEC 61439 1:2020, 3.7.16);
- suitable for indoor or outdoor installation.
This document identifies definitions, specifies the service conditions, details the construction requirements, defines the technical characteristics, and provides verifications for PVAs. PVAs can also include control or signalling devices, or both, associated with the distribution of electrical energy. This document applies to all PVAs whether they are designed and manufactured on a one-off basis or fully standardized and manufactured in quantity. Either the manufacture or assembly, or both, can be carried out by an entity other than the original manufacturer (see IEC 61439 1:2020, 3.10.1).
This document does not apply to:
- individual devices, for example, circuit-breakers, fuse switches and self-contained components such as, motor starters, switch mode power supplies (SMPS), uninterruptable power supplies (UPS), basic drive modules (BDM), complete drive modules (CDM), adjustable speed power drives systems (PDS), stand-alone energy storage systems (battery and capacitor systems), other electronic equipment which comply with their relevant product standards, such as junction boxes of photovoltaic modules. This document describes their integration into a PVA or an empty enclosure used as a part of a PVA;
- photovoltaic power conversion equipment (PCE) incorporating DC combination sub-systems, covered by the IEC 62109 series.
Some applications, such as either explosive atmospheres or functional safety, or both, can be subject to the requirements of other standards or local installation rules in addition to those specified in the IEC 61439 series. This document does not apply to the specific types of assemblies covered by other parts of the IEC 61439 series.
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IEC 60947-5-5:2026 This edition includes the following significant technical changes with respect to the previous edition:
a) re-shaping the document with the clause numbers and names to be in line with other documents of the 60947 series;
b) review of the test method to reasonably determine that the latch mechanism meets the requirements of the document;
c) new Annex B for special requirements for illuminated push-button type emergency stop devices, including the reference to a function to distinguish between "active and inactive" by changing the colour of the push-button depending on the illumination.
This part of IEC 60947-5 provides detailed specifications relating to the electrical and mechanical construction of emergency stop devices with mechanical latching function and to their testing.
This document is applicable to electrical control circuit devices and switching elements which are used to initiate an emergency stop signal. Such devices can be provided with their own enclosure and will be installed according to the product documentation.
This document does not apply to:
– emergency stop devices for non-electrical control applications, for example hydraulic or pneumatic;
– emergency stop devices without mechanical latching function.
An emergency stop device conforming to this document can also be used as part of an emergency switching off means in compliance with IEC 60364-5-53.
NOTE See also IEC 60204-1:2016 and IEC 60204-1:2016/AMD1:2021, 9.2.3.4.
This document does not address specific requirements on acoustic noise as the noise emission of electrical emergency stop devices with mechanical latching function is not considered to be a relevant hazard.
This second edition cancels and replaces the first edition published in 1997. This edition constitutes a technical revision.
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This European Standard is applicable to new low voltage devices for measurement, control and protection which are: — for indoor or outdoor fixed installations in traction systems, and — operated in conjunction with high voltage equipment with an a.c. line voltage and frequency as specified in EN 50163. This European Standard also applies to measurement, control and protective devices other than low voltage devices and not covered by a specific railway product standard as far as reasonably possible. Requirements of this document prevail. Scope of amendment Implementation of 2 technical changes: — Modification of subclause 5.4, second item in list of protection functions. — Aligning the value for short-circuit current of 50 Hz traction systems given in Annex A subclause A.2.1 ‘Line testing – General’ with EN 50388-1:2022 Table 7
- Amendment4 pagesEnglish languagee-Library read for1 day
IEC 62683-2-2:2025 specifies the building information modelling (BIM) with the physical characteristics and technical services of low-voltage switchgear and controlgear assemblies to be used mainly for the construction phase of the building and also for delivering data for operation.
This document covers all types of assemblies covered by the IEC 61439 series which can be installed in a building.
Busbar trunking systems defined by IEC 61439-6 are under consideration for a next edition.
These BIM object models, registered in IEC CDD, are intended to supply the process defined by ISO 16739 series.
This document does not cover:
– the build-in components included within the assembly such as switchgear and controlgear,
– safety related control system of machinery,
– the detailed electrical and mechanical configuration of the assembly
– logistic information.
- Standard33 pagesEnglish languagee-Library read for1 day
IEC 62683-2-2:2025 specifies the building information modelling (BIM) with the physical characteristics and technical services of low-voltage switchgear and controlgear assemblies to be used mainly for the construction phase of the building and also for delivering data for operation. This document covers all types of assemblies covered by the IEC 61439 series which can be installed in a building. Busbar trunking systems defined by IEC 61439-6 are under consideration for a next edition. These BIM object models, registered in IEC CDD, are intended to supply the process defined by ISO 16739 series. This document does not cover: – the build-in components included within the assembly such as switchgear and controlgear, – safety related control system of machinery, – the detailed electrical and mechanical configuration of the assembly – logistic information.
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IEC 63208:2025 This document applies to the main functions of switchgear and controlgear and their assemblies, called equipment, in the context of operational technology (OT 3.1.34). It is applicable to equipment with wired or wireless data communication means and their physical accessibility, within their limits of environmental conditions. It is intended to achieve the appropriate physical and cybersecurity mitigation against vulnerabilities to security threats.
This document provides requirements on the appropriate:
– security risk assessment to be developed including the attack levels, the typical threats, the impact assessment and the relationship with safety;
– levels of exposure of the communication interface and the determination of the equipment security level;
– assessment of the exposure level of the communication interfaces;
– assignment of the required security measures for the equipment;
– countermeasures for the physical access and the environment derived from ISO/IEC 27001;
– countermeasures referring to IEC 62443-4-2 with their criteria of applicability;
– user instructions for installation, operation and maintenance;
– conformance verification and testing, and – security protection profiles by family of equipment (Annex E to Annex I).
In particular, it focuses on potential vulnerabilities to threats resulting in:
– unintended operation, which can lead to hazardous situations;
– unavailability of the protective functions (overcurrent, earth fault, etc.);
– other degradation of main function.
It also provides guidance on the cybersecurity management with the:
– roles and responsibilities (Table 4);
– typical architectures (Annex A);
– use cases (Annex B);
– development methods (Annex C);
– recommendations to be provided to users and for integration into an assembly (Annex D);
– bridging references to cybersecurity management systems (Annex K).
This document does not cover security requirements for:
– information technology (IT);
– industrial automation and control systems (IACS), engineering workstations and their software applications;
– critical infrastructure or energy management systems;
– network device (communication network switch or virtual private network terminator), or
– data confidentiality other than for critical security parameters;
– design lifecycle management. For this aspect, see IEC 62443-4-1, ISO/IEC 27001 or other security lifecycle management standards.
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IEC 63208:2025 This document applies to the main functions of switchgear and controlgear and their assemblies, called equipment, in the context of operational technology (OT 3.1.34). It is applicable to equipment with wired or wireless data communication means and their physical accessibility, within their limits of environmental conditions. It is intended to achieve the appropriate physical and cybersecurity mitigation against vulnerabilities to security threats. This document provides requirements on the appropriate: – security risk assessment to be developed including the attack levels, the typical threats, the impact assessment and the relationship with safety; – levels of exposure of the communication interface and the determination of the equipment security level; – assessment of the exposure level of the communication interfaces; – assignment of the required security measures for the equipment; – countermeasures for the physical access and the environment derived from ISO/IEC 27001; – countermeasures referring to IEC 62443-4-2 with their criteria of applicability; – user instructions for installation, operation and maintenance; – conformance verification and testing, and – security protection profiles by family of equipment (Annex E to Annex I). In particular, it focuses on potential vulnerabilities to threats resulting in: – unintended operation, which can lead to hazardous situations; – unavailability of the protective functions (overcurrent, earth fault, etc.); – other degradation of main function. It also provides guidance on the cybersecurity management with the: – roles and responsibilities (Table 4); – typical architectures (Annex A); – use cases (Annex B); – development methods (Annex C); – recommendations to be provided to users and for integration into an assembly (Annex D); – bridging references to cybersecurity management systems (Annex K). This document does not cover security requirements for: – information technology (IT); – industrial automation and control systems (IACS), engineering workstations and their software applications; – critical infrastructure or energy management systems; – network device (communication network switch or virtual private network terminator), or – data confidentiality other than for critical security parameters; – design lifecycle management. For this aspect, see IEC 62443-4-1, ISO/IEC 27001 or other security lifecycle management standards.
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IEC 62626-1:2023 is available as IEC 62626-1:2023 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 62626-1:2023 applies to enclosed switches-disconnectors with rated voltages up to 1 000 V AC for repair and maintenance work or cleaning work in load circuits. Devices within the scope of this document are switch-disconnectors in accordance with IEC 60947-3 with specific additional requirements. Enclosed switch-disconnectors in this document are suitable for isolation in accordance with the IEC 60947 series and are not equipped with means for remote control or automatic switching to avoid unexpected or accidental start. These devices are not used for operational switching, for example quick start and stop, jogging. This second edition cancels and replaces the first 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) update of this document based on IEC 60947-1:2020.
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IEC 61095:2023 is available as IEC 61095:2023 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 61095:2023 applies to electromechanical air break contactors for household and similar purposes provided with main contacts intended to be connected to circuits the rated voltage of which does not exceed 440 V AC (between phases) with rated operational currents less than or equal to 63 A for utilization category AC-7a, and 32 A for utilization categories AC‑7b, AC‑7c and AC-7d (expressed in rated power), and rated conditional short-circuit current less than or equal to 6 kA. This third edition cancels and replaces the second edition published in 2009. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) addition of requirements for screwless terminals;
b) addition of requirements for the switching of LED lamps. Contactors for domestic and similar applications can be used for controlling lighting loads which is increasingly using LED lamp technology. A specific category for contactors is created: AC-7d. Requirements and tests are added to cover this market development, mainly for making and breaking and conventional operational performance;
c) addition of requirements for contactors with electronically controlled electromagnet. Household contactors with electronically controlled electromagnet are available for years on the market. To fully cover such device, requirements and tests are added, dealing mainly with operating limits, behaviour in abnormal conditions, breakdown of components, EMC tests, etc.
d) embedded software. More and more contactors are incorporating electronic circuits with embedded software. A reference is provided to guide the design of the software.
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IEC 60947-5-7:2024 states the requirements for proximity devices that correspond to the scope of IEC 60947-5-2:2019 with analog output (PDAO) and/or a digital output to transmit a corresponding digital value representing the detected sensing input. These devices can provide additional parameters.
This second edition cancels and replaces the first edition published in 2003. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) New structure;
b) Update and expansion of definitions on analog output properties;
c) Expanded performance requirements on analog output;
d) Update and new normative references;
e) Update of EMC requirements;
f) Harmonization with IEC 62828 series;
g) Harmonization with IEC 62683 and IEC 61987 definitions;
h) Harmonization with IEC 61131-2 requirements;
i) Update of the Annex A (former Annex G), Example of the determination of the conformity;
j) New Annex B, Overview tests and influence quantities;
k) New Annex C, Additional requirements for proximity switches with analog output incorporating a built-in communication interface complying with IEC 61131-9;
l) New Annex D, Main characteristics for proximity devices with analog output.
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IEC 60947-4-1:2023 is applicable to the following equipment:
- electromechanical contactors and starters including motor protective switching devices (MPSD and IMPSD);
- actuators of contactor relays;
- contacts dedicated exclusively to the coil circuit of the contactor or the contactor relay;
- dedicated accessories (e.g. dedicated wiring, dedicated latch accessory);
intended to be connected to distribution circuits, motors circuits and other load circuits, the rated voltage of which does not exceed 1 000 V AC or 1 500 V DC.
This fifth edition cancels and replaces the fourth edition published in 2018. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) objective in the scope;
b) instantaneous only motor protective switching device IMPSD (3.5.33);
c) kinds of equipment (5.2.1);
d) methods of overload protection of motors (5.2.6);
e) adoption of the AC-7d from IEC 61095:2023 (in 5.4.2);
f) separately mounted overload relay of a starter (in 5.7.3 b));
g) starter and contactor suitable for use downstream to basic drive module (6.1.2 w));
h) reference to IEC TS 63058 for environmental aspects (in 6.4);
i) wiring subject to movement (in 8.1.3);
j) use of voltage transient limiting device (8.1.18);
k) accessible parts subject to temperature limits (in 8.2.2.3);
l) reference to Annex X of IEC 60947-1:2020 for the co-ordination of MPSD with SCPD (8.2.5.4);
m) reference to IEC TR 63216 with different EMC environments (8.3.1);
n) reference to IEC TR 63201 for the embedded software design (8.4);
o) reference to IEC TS 63208 for cybersecurity aspects (8.5);
p) update and completion of the measurement method of the power consumption of the electromagnet (9.3.3.2.1.2);
q) update of Annex C including rational about AC-3e;
r) determination of the critical load current for photovoltaic applications (M.8.7).
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IEC 63119-1:2025 establishes a basis for the other parts of IEC 63119, specifying the terms and definitions, general description of the system model, classification, information exchange and security mechanisms for roaming between EV charging service providers (CSPs), charging station operators (CSOs) and clearing house platforms through roaming endpoints. It provides an overview and describes the general requirements of the EV roaming service system. The IEC 63119 series is applicable to high-level communication involved in information exchange/interaction between different CSPs, as well as between a CSP and a CSO with or without a clearing house platform through the roaming endpoint. The IEC 63119 series does not specify the information exchange, either between the charging station (CS) and the charging station operator (CSO), or between the EV and the CS. This second edition cancels and replaces the first edition published in 2019. This edition includes the following significant technical changes with respect to the previous edition: a) the scope is expanded to include differentiation between home and visited service provider roles and adds an explicit definition of roaming entity; b) adds definitions for "home charging service provider (home-CSP)", "visited charging station operator (visited-CSO)", and "charging detail record (CDR)", and expands related terms such as "service" and "roaming entity"; c) introduces abbreviation variants for "home-CSP" and "visited-CSO" in the terminology, aligning with North American and European conventions; d) updates the communication protocol stack by adopting a newer TLS version (upgraded from 1.2 to 1.3); e) system architecture and communication interfaces include detailed interactions between home-CSP and visited-CSO; f) adds a definition for "service" to cover a broader range of applications such as parking and reservation management; g) adds a distinction between "charging detail record (CDR)" and "service detail record (SDR)" and clarifies their relationship in the terminology; h) enhances the description of user credential transfer methods in communication interfaces with greater diversity; i) enhances the description of the mixed mode in the classification of roaming service models, emphasizing improved user experience through faster response times.
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IEC 62683-2-2:2025 specifies the building information modelling (BIM) with the physical characteristics and technical services of low-voltage switchgear and controlgear assemblies to be used mainly for the construction phase of the building and also for delivering data for operation.
This document covers all types of assemblies covered by the IEC 61439 series which can be installed in a building.
Busbar trunking systems defined by IEC 61439-6 are under consideration for a next edition.
These BIM object models, registered in IEC CDD, are intended to supply the process defined by ISO 16739 series.
This document does not cover:
– the build-in components included within the assembly such as switchgear and controlgear,
– safety related control system of machinery,
– the detailed electrical and mechanical configuration of the assembly
– logistic information.
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IEC 62626-1:2023 is available as IEC 62626-1:2023 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 62626-1:2023 applies to enclosed switches-disconnectors with rated voltages up to 1 000 V AC for repair and maintenance work or cleaning work in load circuits. Devices within the scope of this document are switch-disconnectors in accordance with IEC 60947-3 with specific additional requirements. Enclosed switch-disconnectors in this document are suitable for isolation in accordance with the IEC 60947 series and are not equipped with means for remote control or automatic switching to avoid unexpected or accidental start. These devices are not used for operational switching, for example quick start and stop, jogging. This second edition cancels and replaces the first 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) update of this document based on IEC 60947-1:2020.
- Standard14 pagesEnglish languagee-Library read for1 day
IEC 60947-5-7:2024 states the requirements for proximity devices that correspond to the scope of IEC 60947-5-2:2019 with analog output (PDAO) and/or a digital output to transmit a corresponding digital value representing the detected sensing input. These devices can provide additional parameters. This second edition cancels and replaces the first edition published in 2003. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) New structure; b) Update and expansion of definitions on analog output properties; c) Expanded performance requirements on analog output; d) Update and new normative references; e) Update of EMC requirements; f) Harmonization with IEC 62828 series; g) Harmonization with IEC 62683 and IEC 61987 definitions; h) Harmonization with IEC 61131-2 requirements; i) Update of the Annex A (former Annex G), Example of the determination of the conformity; j) New Annex B, Overview tests and influence quantities; k) New Annex C, Additional requirements for proximity switches with analog output incorporating a built-in communication interface complying with IEC 61131-9; l) New Annex D, Main characteristics for proximity devices with analog output.
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IEC 60947-4-1:2023 is applicable to the following equipment: - electromechanical contactors and starters including motor protective switching devices (MPSD and IMPSD); - actuators of contactor relays; - contacts dedicated exclusively to the coil circuit of the contactor or the contactor relay; - dedicated accessories (e.g. dedicated wiring, dedicated latch accessory); intended to be connected to distribution circuits, motors circuits and other load circuits, the rated voltage of which does not exceed 1 000 V AC or 1 500 V DC. This fifth edition cancels and replaces the fourth edition published in 2018. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) objective in the scope; b) instantaneous only motor protective switching device IMPSD (3.5.33); c) kinds of equipment (5.2.1); d) methods of overload protection of motors (5.2.6); e) adoption of the AC-7d from IEC 61095:2023 (in 5.4.2); f) separately mounted overload relay of a starter (in 5.7.3 b)); g) starter and contactor suitable for use downstream to basic drive module (6.1.2 w)); h) reference to IEC TS 63058 for environmental aspects (in 6.4); i) wiring subject to movement (in 8.1.3); j) use of voltage transient limiting device (8.1.18); k) accessible parts subject to temperature limits (in 8.2.2.3); l) reference to Annex X of IEC 60947-1:2020 for the co-ordination of MPSD with SCPD (8.2.5.4); m) reference to IEC TR 63216 with different EMC environments (8.3.1); n) reference to IEC TR 63201 for the embedded software design (8.4); o) reference to IEC TS 63208 for cybersecurity aspects (8.5); p) update and completion of the measurement method of the power consumption of the electromagnet (9.3.3.2.1.2); q) update of Annex C including rational about AC-3e; r) determination of the critical load current for photovoltaic applications (M.8.7).
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IEC 61095:2023 is available as IEC 61095:2023 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 61095:2023 applies to electromechanical air break contactors for household and similar purposes provided with main contacts intended to be connected to circuits the rated voltage of which does not exceed 440 V AC (between phases) with rated operational currents less than or equal to 63 A for utilization category AC-7a, and 32 A for utilization categories AC‑7b, AC‑7c and AC-7d (expressed in rated power), and rated conditional short-circuit current less than or equal to 6 kA. This third edition cancels and replaces the second edition published in 2009. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) addition of requirements for screwless terminals; b) addition of requirements for the switching of LED lamps. Contactors for domestic and similar applications can be used for controlling lighting loads which is increasingly using LED lamp technology. A specific category for contactors is created: AC-7d. Requirements and tests are added to cover this market development, mainly for making and breaking and conventional operational performance; c) addition of requirements for contactors with electronically controlled electromagnet. Household contactors with electronically controlled electromagnet are available for years on the market. To fully cover such device, requirements and tests are added, dealing mainly with operating limits, behaviour in abnormal conditions, breakdown of components, EMC tests, etc. d) embedded software. More and more contactors are incorporating electronic circuits with embedded software. A reference is provided to guide the design of the software.
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IEC 63208:2025 This document applies to the main functions of switchgear and controlgear and their assemblies, called equipment, in the context of operational technology (OT 3.1.34). It is applicable to equipment with wired or wireless data communication means and their physical accessibility, within their limits of environmental conditions. It is intended to achieve the appropriate physical and cybersecurity mitigation against vulnerabilities to security threats.
This document provides requirements on the appropriate:
– security risk assessment to be developed including the attack levels, the typical threats, the impact assessment and the relationship with safety;
– levels of exposure of the communication interface and the determination of the equipment security level;
– assessment of the exposure level of the communication interfaces;
– assignment of the required security measures for the equipment;
– countermeasures for the physical access and the environment derived from ISO/IEC 27001;
– countermeasures referring to IEC 62443-4-2 with their criteria of applicability;
– user instructions for installation, operation and maintenance;
– conformance verification and testing, and – security protection profiles by family of equipment (Annex E to Annex I).
In particular, it focuses on potential vulnerabilities to threats resulting in:
– unintended operation, which can lead to hazardous situations;
– unavailability of the protective functions (overcurrent, earth fault, etc.);
– other degradation of main function.
It also provides guidance on the cybersecurity management with the:
– roles and responsibilities (Table 4);
– typical architectures (Annex A);
– use cases (Annex B);
– development methods (Annex C);
– recommendations to be provided to users and for integration into an assembly (Annex D);
– bridging references to cybersecurity management systems (Annex K).
This document does not cover security requirements for:
– information technology (IT);
– industrial automation and control systems (IACS), engineering workstations and their software applications;
– critical infrastructure or energy management systems;
– network device (communication network switch or virtual private network terminator), or
– data confidentiality other than for critical security parameters;
– design lifecycle management. For this aspect, see IEC 62443-4-1, ISO/IEC 27001 or other security lifecycle management standards.
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This document covers internal arc-fault control devices, hereinafter referred to as IACD, which
are intended to:
- detect internal arc-faults in low-voltage switchgear and controlgear assemblies, by
processing (at a minimum) the optical effect of an internal arc-fault, and
- operate mitigation device (either external or combined)
in order to minimize the effects of the internal arc-fault (see Figure 1).
For the purpose of this document the terms "light" or "optical" covers more than visible spectra.
They may cover also, for example, infrared or ultraviolet electromagnetic radiations (see
Annex D).
For combined-type IACD, this document is considered in addition to the relevant product
standard for internal arc-fault mitigation devices (IARD per IEC TS 63107:2020). Compliance
to the relevant product standard is mandatory and cannot be claimed by testing to this document
alone.
NOTE 1 Low-voltage switchgear and controlgear assemblies are usually described by IEC 61439 series.
[Figure 1]
Therefore, this document covers the following:
- internal arc-fault control device (stand-alone, multifunction or combined);
- one or more associated sensor(s) used to detect optical effect of the internal arc-fault;
- sensor(s), sensing another physical effect, to confirm the fault;
- associated or combined mitigation device.
An IACD is not intended to trigger under normal operation of low-voltage switchgear and
controlgear (i.e. absence of internal arc-fault), including normal arcing associated with
operation of disconnecting and switching devices.
This document only covers the following methods:
- optical detection of the light caused by an internal arc-fault;
- optional confirmation of internal arc-fault by line current measurement.
Many different conductive materials could be used in LV assemblies (e.g. steel, copper,
aluminium). Nevertheless, tests specified in this document are deemed to represent the most
critical and challenging conditions for arc-detection and cover all combinations of conductive
materials.
NOTE 2 Compared to other materials (e.g. steel, aluminium), copper leads to a lower optical radiation energy.
The rated voltage of the assembly in which an IACD is installed does not exceed 1 000 V AC.
Such devices are designed to be operated and maintained by skilled persons only.
This document does not cover:
- DC internal arc-fault detection and control;
- overcurrent relays;
- AFDD (arc-fault detection devices) as defined by IEC 62606;
- guidance on installation within assemblies;
NOTE 3 The integration of an IACD into an assembly is described in IEC TS 63107.
- use with additional measures needed for installation and operation within explosive
atmospheres. These are given in IEC 60079 series documents;
- requirements for embedded software and firmware design rules; for this subject, the
manufacturer is responsible for taking additional safety measures;
NOTE 4 IEC TR 63201 describes rules for firmware and embedded software development preventing errors in
software.
- cybersecurity aspects; for this subject, the manufacturer is responsible for taking additional
safety measures;
NOTE 5 See IEC TS 63208.
- mobile applications.
NOTE 6 Even when addressing internal arc-fault mitigation devices, this document does not supersede any other
relevant product standard (e.g. IEC 60947-2 or IEC 60947-9-1).
NOTE 7 DC arcing fault phenomena are under consideration. Further investigation is needed to comprehend DC
arcing phenomena and required sensing.
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IEC 60947-7-1:2025 specifies requirements for terminal blocks and test disconnect terminal blocks according to Annex D with screw-type or screw-less-type clamping units primarily intended for industrial or similar use and to be fixed to a support to provide electrical and mechanical connection between copper conductors. It applies to terminal blocks intended to connect round copper conductors, with or without special preparation, having a cross-section between 0,05 mm2/30 AWG and 300 mm2/600 kcmil, intended to be used in circuits of a rated voltage not exceeding 1 000 V AC up to 1 000 Hz or 1 500 V DC. The tests on terminal blocks are made with AC or DC supply as required in relevant clauses of this document.
This fourth edition cancels and replaces the third edition published in 2009. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) Scope extension for smaller conductor cross-sections;
b) Implementation of a contact pressure via insulation material (CoPI) test;
c) Introduction of new informative Annex E for larger cross-sections;
d) Reorganisation of all tables merged into two tables for electrical and mechanical values;
e) Implementation of AWG-sizes conductor types as an equivalent type of metric conductor with examples in Annex C;
f) Reorganisation of Annex D test disconnect terminal blocks to enhance readability;
g) Introduction of new informative Annex A for main characteristics of terminal blocks.
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IEC 63119-1:2025 establishes a basis for the other parts of IEC 63119, specifying the terms and definitions, general description of the system model, classification, information exchange and security mechanisms for roaming between EV charging service providers (CSPs), charging station operators (CSOs) and clearing house platforms through roaming endpoints. It provides an overview and describes the general requirements of the EV roaming service system. The IEC 63119 series is applicable to high-level communication involved in information exchange/interaction between different CSPs, as well as between a CSP and a CSO with or without a clearing house platform through the roaming endpoint. The IEC 63119 series does not specify the information exchange, either between the charging station (CS) and the charging station operator (CSO), or between the EV and the CS. This second edition cancels and replaces the first edition published in 2019.
This edition includes the following significant technical changes with respect to the previous edition:
a) the scope is expanded to include differentiation between home and visited service provider roles and adds an explicit definition of roaming entity;
b) adds definitions for "home charging service provider (home-CSP)", "visited charging station operator (visited-CSO)", and "charging detail record (CDR)", and expands related terms such as "service" and "roaming entity";
c) introduces abbreviation variants for "home-CSP" and "visited-CSO" in the terminology, aligning with North American and European conventions;
d) updates the communication protocol stack by adopting a newer TLS version (upgraded from 1.2 to 1.3);
e) system architecture and communication interfaces include detailed interactions between home-CSP and visited-CSO;
f) adds a definition for "service" to cover a broader range of applications such as parking and reservation management;
g) adds a distinction between "charging detail record (CDR)" and "service detail record (SDR)" and clarifies their relationship in the terminology;
h) enhances the description of user credential transfer methods in communication interfaces with greater diversity;
i) enhances the description of the mixed mode in the classification of roaming service models, emphasizing improved user experience through faster response times.
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IEC 60947-7-1:2025 specifies requirements for terminal blocks and test disconnect terminal blocks according to Annex D with screw-type or screw-less-type clamping units primarily intended for industrial or similar use and to be fixed to a support to provide electrical and mechanical connection between copper conductors. It applies to terminal blocks intended to connect round copper conductors, with or without special preparation, having a cross-section between 0,05 mm2/30 AWG and 300 mm2/600 kcmil, intended to be used in circuits of a rated voltage not exceeding 1 000 V AC up to 1 000 Hz or 1 500 V DC. The tests on terminal blocks are made with AC or DC supply as required in relevant clauses of this document. This fourth edition cancels and replaces the third edition published in 2009. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) Scope extension for smaller conductor cross-sections; b) Implementation of a contact pressure via insulation material (CoPI) test; c) Introduction of new informative Annex E for larger cross-sections; d) Reorganisation of all tables merged into two tables for electrical and mechanical values; e) Implementation of AWG-sizes conductor types as an equivalent type of metric conductor with examples in Annex C; f) Reorganisation of Annex D test disconnect terminal blocks to enhance readability; g) Introduction of new informative Annex A for main characteristics of terminal blocks.
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IEC 60947-5-1:2024 applies to control circuit devices and switching elements intended for controlling, signalling, interlocking, etc., of switchgear and controlgear.
It applies to control circuit devices having a rated voltage not exceeding 1 000 V AC (at a frequency not exceeding 1 000 Hz) or 600 V DC.
This fifth edition cancels and replaces the fourth edition published in 2016. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) update of the scope structure and exclusions;
b) requirements for control circuits;
c) update of the normal service conditions (e.g. shock and vibration);
d) update of information and marking requirements including environmental information requirements referencing IEC TS 63058:2021;
e) update of the constructional requirements and the corresponding tests considering safety aspects (e.g. artificial optical radiation, security aspects, limited energy source, stored charge energy circuit);
f) update of the EMC requirements according to the generic documents;
g) new requirements for reed contact magnetic switches in Annex D;
h) requirements for class II circuit devices achieved by double or reinforced insulation in Annex F;
i) update of pull-out tests in Annex G;
j) information requirements for audible signalling device in Annex J;
k) insertion of new Annex O.
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IEC 60947-3:2020 applies to switches, disconnectors, switch-disconnectors and fuse-combination units and their dedicated accessories to be used in distribution circuits and motor circuits of which the rated voltage does not exceed 1 000 V AC or 1 500 V DC. This fourth edition cancels and replaces the third edition published in 2008, Amendment 1:2012 and Amendment 2:2015. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
- addition of critical load current tests for DC switches (see 9.3.9);
- addition of requirements for a conditional short-circuit rating for disconnectors, switches, and switch-disconnectors protected by circuit-breakers (see 9.3.7.2);
- addition of new categories for high-efficiency motors switching (see Annex A);
- addition of new Annex E for connection to aluminium conductors;
- addition of new Annex F for power losses measurement.
The contents of the corrigendum of October 2021 have been included in this copy.
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IEC 60947-5-1:2024 applies to control circuit devices and switching elements intended for controlling, signalling, interlocking, etc., of switchgear and controlgear. It applies to control circuit devices having a rated voltage not exceeding 1 000 V AC (at a frequency not exceeding 1 000 Hz) or 600 V DC. This fifth edition cancels and replaces the fourth edition published in 2016. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) update of the scope structure and exclusions; b) requirements for control circuits; c) update of the normal service conditions (e.g. shock and vibration); d) update of information and marking requirements including environmental information requirements referencing IEC TS 63058:2021; e) update of the constructional requirements and the corresponding tests considering safety aspects (e.g. artificial optical radiation, security aspects, limited energy source, stored charge energy circuit); f) update of the EMC requirements according to the generic documents; g) new requirements for reed contact magnetic switches in Annex D; h) requirements for class II circuit devices achieved by double or reinforced insulation in Annex F; i) update of pull-out tests in Annex G; j) information requirements for audible signalling device in Annex J; k) insertion of new Annex O.
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IEC 60947-7-1:2025 specifies requirements for terminal blocks and test disconnect terminal blocks according to Annex D with screw-type or screw-less-type clamping units primarily intended for industrial or similar use and to be fixed to a support to provide electrical and mechanical connection between copper conductors. It applies to terminal blocks intended to connect round copper conductors, with or without special preparation, having a cross-section between 0,05 mm2/30 AWG and 300 mm2/600 kcmil, intended to be used in circuits of a rated voltage not exceeding 1 000 V AC up to 1 000 Hz or 1 500 V DC. The tests on terminal blocks are made with AC or DC supply as required in relevant clauses of this document.
This fourth edition cancels and replaces the third edition published in 2009. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) Scope extension for smaller conductor cross-sections;
b) Implementation of a contact pressure via insulation material (CoPI) test;
c) Introduction of new informative Annex E for larger cross-sections;
d) Reorganisation of all tables merged into two tables for electrical and mechanical values;
e) Implementation of AWG-sizes conductor types as an equivalent type of metric conductor with examples in Annex C;
f) Reorganisation of Annex D test disconnect terminal blocks to enhance readability;
g) Introduction of new informative Annex A for main characteristics of terminal blocks.
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IEC 60947-2:2024 applies to circuit-breakers, intended to be installed and operated by instructed or skilled persons, the main contacts of which are intended to be connected to circuits, the rated voltage of which does not exceed 1 000 V AC or 1 500 V DC; it also contains additional requirements for integrally fused circuit-breakers.
This document also applies to circuit-breakers with ratings at or below 1 000 V AC, additionally having one or more ratings above 1 000 V AC but not exceeding 1 500 V AC.
This sixth edition cancels and replaces the fifth edition published in 2016 and its Amendment 1: 2019. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) suitability for isolation (see Clause 1);
b) removal of the classification according to the interrupting medium, according to the design, according to the suitability for isolation (see Clause 4);
c) adjustment of current settings with an external device connectable to the release (see 5.7.3);
d) requirements for circuits with protective separation (see 8.2.3.8);
e) additional tests for ground-fault overcurrent releases (see 9.3.4.2.5);
f) additional tests concerning dielectric properties in tripped position (see 9.3.4.3);
g) use of DC voltage for dielectric tests (see 9.3.4.6.2 and 9.4.6);
h) tests of individual pole breaking capacity under phase-to-neutral AC voltage (see 9.3.11);
i) improvement of measurement of power loss in Annex G;
j) changes in EMC tests (see Annex J);
k) introduction of CBI class W in Annex L.
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IEC 60947-2:2024 applies to circuit-breakers, intended to be installed and operated by instructed or skilled persons, the main contacts of which are intended to be connected to circuits, the rated voltage of which does not exceed 1 000 V AC or 1 500 V DC; it also contains additional requirements for integrally fused circuit-breakers. This document also applies to circuit-breakers with ratings at or below 1 000 V AC, additionally having one or more ratings above 1 000 V AC but not exceeding 1 500 V AC. This sixth edition cancels and replaces the fifth edition published in 2016 and its Amendment 1: 2019. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) suitability for isolation (see Clause 1); b) removal of the classification according to the interrupting medium, according to the design, according to the suitability for isolation (see Clause 4); c) adjustment of current settings with an external device connectable to the release (see 5.7.3); d) requirements for circuits with protective separation (see 8.2.3.8); e) additional tests for ground-fault overcurrent releases (see 9.3.4.2.5); f) additional tests concerning dielectric properties in tripped position (see 9.3.4.3); g) use of DC voltage for dielectric tests (see 9.3.4.6.2 and 9.4.6); h) tests of individual pole breaking capacity under phase-to-neutral AC voltage (see 9.3.11); i) improvement of measurement of power loss in Annex G; j) changes in EMC tests (see Annex J); k) introduction of CBI class W in Annex L.
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IEC 62683-2:2024 specifies the functional safety and reliability data model descriptions for low‑voltage switchgear and controlgear to be used by engineering tools for the design of safety related control systems according to IEC 62061, IEC 61508-2 and ISO 13849-1, and for dependability analysis of electrotechnical systems.
This dictionary is used to facilitate the exchange between computers of data characterizing low-voltage switchgear and controlgear.
Each property has an unambiguously defined meaning and naming, and where relevant, a defined value list, a defined format and a defined unit.
The data models described in this document are intended to complement the product catalogue data defined by IEC 62683-1.
This document does not cover:
- exchange format such as defined in VDMA 66413,
- explosive atmosphere applications,
- manufacturer specific features.
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IEC 63404:2024 defines radiocommunication related requirements for equipment intended to integrate a radiocommunication device. It includes the initial integration and update of a the radiocommunication device, having a carrier frequency greater than 380 MHz, into new or updated host equipment with:
- The classification of integration categories;
- The EMC immunity verification using a capability profile approach;
- The verification of the unwanted emission level of the radio transceiver.
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CORRECTED VERSION 2026-03
The content of the corrigendum 1 (2026-03) has been included in this copy.
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IEC 60947-4-3:2020(E) applies to semiconductor controllers and semiconductor contactors for non-motor load intended to be connected to circuits, the rated voltage of which does not exceed 1 000 V AC.
It covers their use:
– for operations of changing the state of AC electric circuits between the ON-state and the OFF-state;
– with or without bypass switching devices;
– as controller, for reducing the amplitude of the RMS AC voltage.
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) scope exclusions;
b) editorial correction of notes and hanging paragraphs;
c) safety aspects related to:
- general aspects;
- limited energy circuits;
- electronic circuits;
d) mention of dedicated wiring accessories;
e) power consumption measurement;
f) alignment to IEC 60947-1:2020;
g) alignment with IEC 60947-4-2 when appropriate.
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IEC 62683-2:2024 specifies the functional safety and reliability data model descriptions for low‑voltage switchgear and controlgear to be used by engineering tools for the design of safety related control systems according to IEC 62061, IEC 61508-2 and ISO 13849-1, and for dependability analysis of electrotechnical systems. This dictionary is used to facilitate the exchange between computers of data characterizing low-voltage switchgear and controlgear. Each property has an unambiguously defined meaning and naming, and where relevant, a defined value list, a defined format and a defined unit. The data models described in this document are intended to complement the product catalogue data defined by IEC 62683-1. This document does not cover: - exchange format such as defined in VDMA 66413, - explosive atmosphere applications, - manufacturer specific features.
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CORRECTED VERSION 2026-03 The content of the corrigendum 1 (2026-03) has been included in this copy.
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IEC 61439-3:2024 defines the specific requirements for distribution boards intended to be operated by ordinary persons (abbreviated DBO throughout this document, see 3.1.101) as follows:
- assemblies intended to be operated by ordinary persons (e.g. switching operations and replacing fuse-links), e.g. in domestic (household) applications;
- assemblies containing outgoing circuits with protective devices intended to be operated by ordinary persons, complying e.g. with IEC 60898-1, the IEC 61008 series, the IEC 61009 series, IEC 62606, IEC 62423 and IEC 60269-3;
- assemblies for applications where the nominal voltage to earth does not exceed 300 V AC (see Table G.1 of IEC 61439-1:2020);
NOTE The voltage limits for DC applications are under consideration.
- assemblies with a rated current (Inc) of the outgoing circuits not exceeding 125 A and a rated current (InA) not exceeding 250 A;
- assemblies intended for use in connection with the generation, transmission, distribution and conversion of electrical energy, and for the control of equipment consuming electrical energy and for associated data processing;
- enclosed, stationary assemblies;
- assemblies for indoor or outdoor use.
This second edition cancels and replaces the first edition published in 2012. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) alignment with the structure of IEC 61439-1:2020;
b) inclusion in the scope of more examples of the type of protection and control devices;
c) deletion of type A and Type B DBOs;
d) addition of a new Annex BB related to DBOs used in a prosumer’s electrical installation (PEI);
e) addition of a new Annex CC related to rated current of a DBO with additional source of supply in parallel/simultaneously with another source that is connected to the DBO e.g. PV.
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IEC 63404:2024 defines radiocommunication related requirements for equipment intended to integrate a radiocommunication device. It includes the initial integration and update of a the radiocommunication device, having a carrier frequency greater than 380 MHz, into new or updated host equipment with: - The classification of integration categories; - The EMC immunity verification using a capability profile approach; - The verification of the unwanted emission level of the radio transceiver.
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IEC TS 63290:2024 provides additional requirements for assemblies in accordance with the product standards of the IEC 61439 series (Part 2 onwards) that incorporate digital functions and communication, in addition to the conventional electromechanical features of assemblies to reflect what is defined within this document as intelligence. It specifies the definitions, service conditions, constructional requirements, technical characteristics and verification requirements that can be carried out in addition to the IEC 61439 series for intelligent low-voltage switchgear and controlgear assemblies.
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