A method of temperature-rise assessment by extrapolation for partially type-tested assemblies (PTTA) of low-voltage switchgear and controlgear

The proposed method is applicable to enclosed PTTA or partitioned sections of PTTA without forced ventilation. It is intended to determine the temperature rise of the air inside the enclosure.

Verfahren zur Ermittlung der Erwärmung von partiell typgeprüften Niederspannung-Schaltgerätekombinationen (PTSK) durch Extrapolation

Méthode de détermination par extrapolation des échauffements pour les ensembles d'appareillage à basse tension dérivés de séries (EDS)

La méthode proposée est applicable aux EDS sous enveloppe ou aux sections compartimentées des EDS sans ventilation forcée. Elle permet de déterminer l'échauffement de l'air à l'intérieur de l'enveloppe.

A method of temperature-rise assessment by extrapolation for partially type-tested assemblies (PTTA) of low-voltage switchgear and controlgear (IEC 60890:1987+corrigendum Mar.1988+A1:1995)

General Information

Status: Withdrawn
Publication Date: 26-Jan-1997

ICS: 29.130.20 - Low voltage switchgear and controlgear

Technical Committee: CLC/TC 17D - Low-voltage switchgear and controlgear assemblies
Drafting Committee: IEC/SC 17D - IEC_SC_17D
Parallel Committee: IEC/SC 17D - IEC_SC_17D

Current Stage: 9960 - Withdrawal effective - Withdrawal
Start Date: 30-Jul-2002
Completion Date: 30-Jul-2002

Directive: 2006/95/EC - Directive 2006/95/EC of the European Parliament and of the Council of 12 December 2006 on the harmonisation of the laws of Member States relating to electrical equipment designed for use within certain voltage limits (codified version)
Directive: 73/23/EEC - Electrical equipment designed for use within certain voltage limits

Ref Project: SIST HD 528 S2:1999 - A method of temperature-rise assessment by extrapolation for partially type-tested assemblies (PTTA) of low-voltage switchgear and controlgear

Relations

Replaces: HD 528 S1:1989 - A method of temperature-rise assessment by extrapolation for partially type-tested assemblies (PTTA) of low-voltage switchgear and controlgear
Effective Date: 29-Jan-2023

Replaced By: CLC/TR 60890:2002 - A method of temperature-rise assessment by extrapolation for partially type-tested assemblies (PTTA) of low-voltage switchgear and controlgear
Effective Date: 29-Jan-2023

Standardization document

HD 528 S2:1999

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39 pages

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Frequently Asked Questions

What is HD 528 S2:1997?

HD 528 S2:1997 is a standardization document published by CLC. Its full title is "A method of temperature-rise assessment by extrapolation for partially type-tested assemblies (PTTA) of low-voltage switchgear and controlgear". This standard covers: The proposed method is applicable to enclosed PTTA or partitioned sections of PTTA without forced ventilation. It is intended to determine the temperature rise of the air inside the enclosure.

What is the scope of HD 528 S2:1997?

The proposed method is applicable to enclosed PTTA or partitioned sections of PTTA without forced ventilation. It is intended to determine the temperature rise of the air inside the enclosure.

What ICS categories does HD 528 S2:1997 belong to?

HD 528 S2:1997 is classified under the following ICS (International Classification for Standards) categories: 29.130.20 - Low voltage switchgear and controlgear. The ICS classification helps identify the subject area and facilitates finding related standards.

What standards are related to HD 528 S2:1997?

HD 528 S2:1997 has the following relationships with other standards: It is inter standard links to HD 528 S1:1989, CLC/TR 60890:2002. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

Is HD 528 S2:1997 a harmonized European standard?

HD 528 S2:1997 is associated with the following European legislation: EU Directives/Regulations: 2006/95/EC, 73/23/EEC. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.

How can I access HD 528 S2:1997?

HD 528 S2:1997 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)

HD 528 S2:1999

SLOVENSKI STANDARD
01-julij-1999
A method of temperature-rise assessment by extrapolation for partially type-tested
assemblies (PTTA) of low-voltage switchgear and controlgear (IEC
60890:1987+corrigendum Mar.1988+A1:1995)
A method of temperature-rise assessment by extrapolation for partially type-tested
assemblies (PTTA) of low-voltage switchgear and controlgear
Verfahren zur Ermittlung der Erwärmung von partiell typgeprüften Niederspannung-
Schaltgerätekombinationen (PTSK) durch Extrapolation
Méthode de détermination par extrapolation des échauffements pour les ensembles
d'appareillage à basse tension dérivés de séries (EDS)
Ta slovenski standard je istoveten z: HD 528 S2:1997
ICS:
29.130.20 Nizkonapetostne stikalne in Low voltage switchgear and
krmilne naprave controlgear
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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CLC

EN 50152-3-1:2017/A1:2025(Amendment)

Railway applications - Fixed installations - Particular requirements for a.c. switchgear - Part 3-1: Measurement, control and protection devices for specific use in a.c. traction systems - Devices

SIST EN 50152-3-1:2017/A1:2026

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

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EN IEC 62683-2-2:2025(Main)

Low-voltage switchgear and controlgear - Product data and properties for information exchange - Engineering data - Part 2-2: Switchgear and controlgear assembly objects for building information modelling

SIST EN IEC 62683-2-2:2026

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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EN IEC 63208:2025(Main)

Low-voltage switchgear and controlgear and their assemblies - Security requirements

SIST EN IEC 63208:2025

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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EN IEC 63119-1:2025(Main)

Information exchange for electric vehicle charging roaming service - Part 1: General

SIST EN IEC 63119-1:2025

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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EN IEC 60947-5-7:2025(Main)

Low-voltage switchgear and controlgear - Part 5-7: Control circuit devices and switching elements - Proximity devices with analogue output

SIST EN IEC 60947-5-7:2025

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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EN IEC 60947-4-1:2025(Main)

Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters

SIST EN IEC 60947-4-1:2025

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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EN IEC 62626-1:2025(Main)

Low-voltage switchgear and controlgear enclosed equipment - Part 1: Additional requirements for enclosed switch-disconnectors in accordance with IEC 60947-3 - Isolation of electrical equipment during repair and maintenance work in specific applications

SIST EN IEC 62626-1:2025

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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EN IEC 61095:2025(Main)

Electromechanical contactors for household and similar purposes

SIST EN IEC 61095:2025

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.

Standard
146 pages
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EN IEC 60947-9-2:2025(Main)

Low-voltage switchgear and controlgear - Part 9-2: Active arc-fault mitigation systems - Optical-based internal arc-detection and mitigation devices

SIST EN IEC 60947-9-2:2025

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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EN IEC 60947-3:2021/A1:2025(Amendment)

Low-voltage switchgear and controlgear - Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units

SIST EN IEC 60947-3:2021/A1:2025

Amendment
32 pages
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A method of temperature-rise assessment by extrapolation for partially type-tested assemblies (PTTA) of low-voltage switchgear and controlgear

Verfahren zur Ermittlung der Erwärmung von partiell typgeprüften Niederspannung-Schaltgerätekombinationen (PTSK) durch Extrapolation

Méthode de détermination par extrapolation des échauffements pour les ensembles d'appareillage à basse tension dérivés de séries (EDS)

A method of temperature-rise assessment by extrapolation for partially type-tested assemblies (PTTA) of low-voltage switchgear and controlgear (IEC 60890:1987+corrigendum Mar.1988+A1:1995)

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HD 528 S2:1999

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