General Information

Abstract: EN following parallel vote * Issued by BTTF 64-1 superseded by TC 96 disbanded by 114 BT * Superseded by EN 61558-1:2005

Status: Withdrawn
Publication Date: 31-Mar-1998

ICS: 29.180 - Transformers. Reactors

Technical Committee: CLC/SR 96 - Small power transformers, reactors, power supply units and similar products
Drafting Committee: IEC/TC 96 - IEC_TC_96
Parallel Committee: IEC/TC 96 - IEC_TC_96

Current Stage: 9960 - Withdrawal effective - Withdrawal
Start Date: 16-Feb-2016
Completion Date: 25-Aug-2026

Directive: Not Harmonized2006/95/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)
OJ Ref: C 71/, C 71/17, C 348/03 OJ Date: 28-Nov-2013
: Harmonized Standard2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
OJ Ref: C 249/03 OJ Date: 08-Jul-2016
: Not Harmonized73/23/EEC - Electrical equipment designed for use within certain voltage limits
OJ Ref: C 208

Ref Project: SIST EN 61558-1:1999/A1:1999 - Safety of power transformers, power supply units and similar -- Part 1: General requirements and tests

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Amendment

EN 61558-1:1999/A1:1999

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Replaced By: EN 61558-1:2005 - Safety of power transformers, power supplies, reactors and similar products - Part 1: General requirements and tests
Effective Date: 28-Jan-2023

Referred By: EN 60947-5-3:1999/A1:2005 - Low-voltage switchgear and controlgear - Part 5-3: Control circuit devices and switching elements - Requirements for proximity devices with defined behaviour under fault conditions (PDF)
Effective Date: 03-Feb-2026

Referred By: EN 60335-1:2002/A2:2006 - Household and similar electrical appliances - Safety - Part 1: General requirements
Effective Date: 03-Feb-2026

Referred By: EN 60065:2002 - Audio, video and similar electronic apparatus - Safety requirements
Effective Date: 03-Feb-2026

Referred By: EN 62041:2010 - Safety of transformers, reactors, power supply units and combinations thereof - EMC requirements
Effective Date: 03-Feb-2026

Referred By: EN 60204-1:2006 - Safety of machinery - Electrical equipment of machines - Part 1: General requirements
Effective Date: 03-Feb-2026

Referred By: EN 60601-1:2006 - Medical electrical equipment - Part 1: General requirements for basic safety and essential performance
Effective Date: 03-Feb-2026

Referred By: EN 61347-2-13:2006 - Lamp controlgear - Part 2-13: Particular requirements for d.c. or a.c. supplied electronic controlgear for LED modules
Effective Date: 03-Feb-2026

Amends: EN 61558-1:1997 - Safety of power transformers, power supply units and similar - Part 1: General requirements and tests
Effective Date: 29-Jan-2023

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EN 61558-1:1999/A1:1999

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Frequently Asked Questions

What is EN 61558-1:1997/A1:1998?

EN 61558-1:1997/A1:1998 is a amendment published by CLC. Its full title is "Safety of power transformers, power supply units and similar - Part 1: General requirements and tests". This standard covers: EN following parallel vote * Issued by BTTF 64-1 superseded by TC 96 disbanded by 114 BT * Superseded by EN 61558-1:2005

What is the scope of EN 61558-1:1997/A1:1998?

EN following parallel vote * Issued by BTTF 64-1 superseded by TC 96 disbanded by 114 BT * Superseded by EN 61558-1:2005

What ICS categories does EN 61558-1:1997/A1:1998 belong to?

EN 61558-1:1997/A1:1998 is classified under the following ICS (International Classification for Standards) categories: 29.180 - Transformers. Reactors. The ICS classification helps identify the subject area and facilitates finding related standards.

What standards are related to EN 61558-1:1997/A1:1998?

EN 61558-1:1997/A1:1998 has the following relationships with other standards: It is inter standard links to EN 61558-1:2005, EN 60947-5-3:1999/A1:2005, EN 60335-1:2002/A2:2006, EN 60065:2002, EN 62041:2010, EN 60204-1:2006, EN 60601-1:2006, EN 61347-2-13:2006, EN 61558-1:1997. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

Is EN 61558-1:1997/A1:1998 a harmonized European standard?

EN 61558-1:1997/A1:1998 is associated with the following European legislation: EU Directives/Regulations: 2006/95/EC, 2014/35/EU, 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 EN 61558-1:1997/A1:1998?

EN 61558-1:1997/A1:1998 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)

EN 61558-1:1999/A1:1999

SLOVENSKI SIST EN 61558-1:1999/A1:1999
prva izdaja
STANDARD
julij 1999
Safety of power transformers, power supply units and similar - Part 1: General
requirements and tests. Amendment A1 ((IEC 61558-1:1997/A1:1998)
ICS 29.180 Referenčna šte
...

CLC

EN IEC 61558-1:2019/AC:2026-01(Corrigendum)

Safety of transformers, reactors, power supply units and combinations thereof - Part 1: General requirements and tests

SIST EN IEC 61558-1:2019/AC:2026

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EN IEC 61558-2-1:2025(Main)

Safety of transformers, reactors, power supply units and combinations thereof - Part 2-1: Particular requirements and tests for separating transformers and power supplies incorporating separating transformers for general applications

SIST EN IEC 61558-2-1:2025

This part of IEC 61558 deals with the safety of separating transformers for general applications and power supply units incorporating separating transformers for general applications. Transformers incorporating electronic circuits are also covered by this document. NOTE 1 Safety includes electrical, thermal and mechanical aspects. Unless otherwise specified, from here onward, the term transformer covers separating transformers for general applications and power supply units incorporating separating transformers for general applications. For power supply units (linear), this document is applicable. For switch mode power supply units, IEC 61558-2-16 is applicable. This document does not apply to transformers covered by IEC 60076-11. This document is applicable to stationary or portable, single-phase or polyphase, air-cooled (natural or forced) independent or associated dry- type transformers. The windings can be encapsulated or non-encapsulated. The rated supply voltage does not exceed 1 000 V AC and the rated supply frequency and the internal operating frequencies do not exceed 500 Hz. The rated output does not exceed: - 1 kVA for single-phase transformers, - 5 kVA for polyphase transformers; This document is applicable to transformers without limitation of the rated output, subject to an agreement between the purchaser and the manufacturer. NOTE 2 Transformers intended to supply distribution networks are not included in the scope. The no-load output voltage or the rated output voltage does not exceed 1 000 V AC or 1 415 V ripple-free DC. For independent transformers the no-load output voltage and / or the rated output voltage is not less than 50 V AC or 120 V ripple-free DC. This document is not applicable to external circuits and their components intended to be connected to the input terminals and output terminals of the transformers. NOTE 3 Transformers covered by this document are only used in applications where double or reinforced insulation between circuits is not required by the installation rules or by the end product standard. NOTE 4 Normally the separating transformers are intended to be used with equipment to provide voltages different from the supply voltage for the functional requirements of the equipment. The protection against electric shock may be provided or completed by other features of the equipment, such as the body. Parts of output circuits may be connected to the input circuits or to protective earthing. Attention is drawn to the following: - for transformers intended to be used in vehicles, on board ships, and aircraft, additional requirements (from other applicable standards, national rules, etc.); - measures to protect the enclosure and the components inside the enclosure against external influences such as fungus, vermin, termites, solar-radiation, and icing; - the different conditions for transportation, storage, and operation of the transformers; - additional requirements in accordance with other appropriate standards and national rules may be applicable to transformers intended for use in special environments. Future technological development of transformers may necessitate a need to increase the upper limit of the frequencies. Until then this document may be used as a guidance document. This group safety publication focusing on safety guidance is primarily intended to be used as a product safety standard for the products mentioned in the scope, but is also intended to be used by technical committees in the preparation of publications for products similar to those mentioned in the scope of this group safety publication, in accordance with the principles laid down in IEC Guide 104 and lSO/lEC Guide 51. One of the responsibilities of a technical committee is, wherever applicable, to make use of BSPs and/or GSPs in the preparation of its publications.

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13-Mar-2025
27-Dec-2021
29.180
2014/35/EU
M/511
CLC/SR 96

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EN IEC 61558-2-13:2025(Main)

Safety of transformers, reactors, power supply units and combinations thereof - Part 2-13: Particular requirements and tests for auto-transformers and power supply units incorporating auto-transformers for general applications

SIST EN IEC 61558-2-13:2025

This part of IEC 61558 deals with the safety of auto-transformers for general applications and power supply units incorporating auto-transformers for general applications. Transformers incorporating electronic circuits are also covered by this document. NOTE 1 Safety includes electrical, thermal and mechanical aspects. Unless otherwise specified, from here onward, the term transformer covers auto-transformers for general applications and power supply units incorporating auto-transformers for general applications. For power supply units (linear) this document is applicable. For switch mode power supply units IEC 61558-2-16 is applicable. This document is applicable to stationary or portable, single-phase or polyphase, air-cooled (natural or forced) independent or associated dry- type transformers. The windings may be encapsulated or non-encapsulated. The rated supply voltage does not exceed 1 000 V AC, and the rated supply frequency and the internal operating frequencies do not exceed 500 Hz. The core power does not exceed: - 2 kVA for single-phase transformers; - 10 kVA for polyphase transformers. The rated output does not exceed: - 40 kVA for single-phase transformers; - 200 kVA for polyphase transformers. This document is applicable to transformers without limitation of the core power and the rated output both being subject to an agreement between the purchaser and the manufacturer. Where applicable, the no-load output voltage or the rated output voltage does not exceed 1 000 V AC or 1 415 V ripple-free DC. For independent transformers, the no-load output voltage and the rated output voltage is not less than 50 V AC or 120 V ripple-free DC. This document is not applicable to external circuits and their components intended to be connected to the input terminals and output terminals of the transformers. NOTE 2 Transformers covered by this document are used only in applications where no insulation between circuits is required by the installation rules or by the end product standard. Attention is drawn to the following: - for transformers intended to be used in vehicles, on board ships, and aircraft, additional requirements (from other applicable standards, national rules, etc.); - measures to protect the enclosure and the components inside the enclosure against external influences such as fungus, vermin, termites, solar-radiation, and icing; - the different conditions for transportation, storage, and operation of the transformers; - additional requirements in accordance with other appropriate standards and national rules may be applicable to transformers intended for use in special environments. Future technological development of transformers may necessitate a need to increase the 202 upper limit of the frequencies. Until then this document may be used as a guidance document. This GROUP SAFETY PUBLICATION focusing on SAFETY guidance is primarily intended to be used as a PRODUCT SAFETY STANDARD for the products mentioned in the scope, but is also intended to be used by TCs in the preparation of publications for products similar to those mentioned in the scope of this GROUP SAFETY PUBLICATION, in accordance with the principles laid down in IEC Guide 104 and lSO/lEC Guide 51. One of the RESPONSIBILITIES of a TC is, wherever applicable, to make use of BSPs and/or GSPs in the preparation of its publications.

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EN IEC 61558-2-8:2025(Main)

Safety of transformers, reactors, power supply units and combinations thereof - Part 2-8: Particular requirements and tests for transformers and power supply units for bells and chimes

SIST EN IEC 61558-2-8:2025

IEC 61558-2-8:2024 is available as IEC 61558-2-8:2024 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 61558-2-8:2024 deals with the safety of bell and chime transformers and power supply units incorporating bell and chime transformers. Transformers incorporating electronic circuits are also covered by this document. 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) adjustment of structure and references in accordance with IEC 61558-1:2017; b) new symbol for power supply unit with linearly regulated output voltage. It has the status of a group safety publication in accordance with IEC Guide 104.

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EN IEC 61558-2-7:2025(Main)

Safety of transformers, reactors, power supply units and combinations thereof - Part 2-7: Particular requirements and tests for transformers and power supply units for toys

SIST EN IEC 61558-2-7:2025

IEC 61558-2-7:2023 is available as IEC 61558-2-7:2023 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 61558-2-7:2023 deals with the safety of transformers for toys and power supply units incorporating transformers for toys. Transformers for toys incorporating electronic circuits are also covered by this document. This third edition cancels and replaces the second edition published in 2007. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) adjustment of structure and references in accordance with IEC 61558-1:2017; b) new symbol for power supply unit with linearly regulated output voltage. It has the status of a group safety publication in accordance with IEC Guide 104.

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EN IEC 61558-2-15:2025(Main)

Safety of transformers, reactors, power supply units and combinations thereof - Part 2-15: Particular requirements and tests for isolating transformers for medical IT systems for the supply of medical locations

SIST EN IEC 61558-2-15:2025

This part of IEC 61558 deals with safety of isolating transformers for medical IT systems for the supply of medical locations. NOTE 1 Safety includes electrical, thermal and mechanical aspects. Unless otherwise specified, from here onward, the term transformer covers isolating transformers for medical IT systems for the supply of medical locations. This document is applicable to isolating transformers, single-phase or three-phase, air-cooled (natural or forced) dry-type transformers for the supply of medical IT system for group 2 medical locations, designed to be permanently connected to the fixed wiring and intended to form the medical IT system on the secondary side. The windings can be encapsulated or non encapsulated. NOTE 2 IT systems are defined in IEC 60364-1. The installation rules for medical IT system for group 2 medical locations are covered by IEC 60364-7-710. Transformers covered by this document are intended for medical IT systems for the supply of medical locations. All other transformers or equipments connected downstream from the transformer are not covered by this document. The rated supply voltage does not exceed 1 000 V AC. The rated supply frequency and internal operational frequency do not exceed 500 Hz. The rated output does not be less than 0,5 kVA and does not exceed 10 kVA for single-phase and three-phase transformers for medical IT system for group 2 medical locations. This document may be applicable to isolating transformers intended to supply other medical installations that are not group 2 medical locations without limitation of the rated output subject to an agreement between the purchaser and the manufacturer. NOTE 3 Transformers intended to supply distribution networks other than medical IT systems are not included in the scope. The no-load output voltage and the rated output voltage does not exceed 250 V AC for single-phase or three-phase transformer (phase-to-phase voltage). This document does not cover power supply units and is not intended to be used in conjunction with IEC 61558-2-16 for switch mode power supply units. This document is not applicable to external circuits and their components intended to be connected to the input terminals and output terminals of the transformers. Transformers covered by this document are used in applications where double or reinforced insulation between circuits is required by the installation rules or by the appliance specification. NOTE National installation rules of some countries have different or additional requirements listed in Annex C of IEC 60364-7-710:2021. Attention is drawn 193 to the following: - for transformers intended to be used in vehicles, on board ships, and aircraft, additional requirements (from other applicable standards, national rules, etc.); - measures to protect the enclosure and the components inside the enclosure against external influences such as fungus, vermin, termites, solar-radiation, and icing; - the different conditions for transportation, storage, and operation of the transformers; - additional requirements in accordance with other appropriate standards and national rules may be applicable to transformers intended for use in special environments. This GROUP SAFETY PUBLICATION focusing on SAFETY guidance is primarily intended to be used as a PRODUCT SAFETY STANDARD for the products mentioned in the scope, but is also intended to be used by TCs in the preparation of publications for products similar to those mentioned in the scope of this GROUP SAFETY PUBLICATION, in accordance with the principles laid down in IEC Guide 104 and lSO/lEC Guide 51. One of the RESPONSIBILITIES of a TC is, wherever applicable, to make use of BSPs and/or GSPs in the preparation of its publications.

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24 pages
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13-Mar-2025
03-Jan-2023
29.180
2014/35/EU
M/511
CLC/SR 96

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EN IEC 61558-2-5:2025(Main)

Safety of transformers, reactors, power supply units and combinations thereof - Part 2-5: Particular requirements and test for transformer for shavers, power supply units for shavers and shaver supply units

SIST EN IEC 61558-2-5:2025

IEC 61558-2-5:2024 is available as IEC 61558-2-5:2024 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 61558-2-5:2024 deals with the safety of shaver transformers, power supply units incorporating a shaver transformer, and shaver supply units. Shaver transformers incorporating electronic circuits are also covered by this document. 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) adjustment of structure and references in accordance with IEC 61558-1:2017; b) new symbol for power supply unit with linearly regulated output voltage. It has the status of a group safety publication in accordance with IEC Guide 104.

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EN IEC 61558-2-3:2025(Main)

Safety of transformers, reactors, power supply units and combinations thereof - Part 2-3: Particular requirements and tests for ignition transformers for gas and oil burners

SIST EN IEC 61558-2-3:2025

IEC 61558-2-3:2023 is available as IEC 61558-2-3:2023 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition. This part of IEC 61558 deals with the safety of ignition transformers for gas and oil burners. Ignition transformers incorporating electronic circuits are also covered by this document. 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) adjustment of structure and references in accordance with IEC 61558-1:2017. It has the status of a group safety publication in accordance with IEC Guide 104. The contents of the corrigendum 1 (2023-09) have been included in this copy.

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EN IEC 61558-2-16:2025(Main)

Safety of transformers, reactors, power supply units and combinations thereof - Part 2-16: Particular requirements and tests for switch mode power supply units and transformers for switch mode power supply units for general applications

SIST EN IEC 61558-2-16:2025

This part of IEC 61558 deals with the safety of switch mode power supply units and transformers for switch mode power supply units. NOTE 1 Safety includes electrical, thermal and mechanical aspects. Unless otherwise specified, from here onward, the term SMPS covers switch mode power supply units for general applications. SMPS covered by this document are air cooled (natural or forced) independent, associated, stationary, portable, single-phase or polyphase with the rated supply voltage not exceeding 1 000 V AC, the rated supply frequency not exceeding 500 Hz, the rated internal operating frequency exceeding 500 Hz, but not exceeding 100 MHz, and the rated output not exceeding 1 kVA or 1 kW, incorporating dry-type transformers with encapsulated or non-encapsulated windings. NOTE 2 As the maximum rated supply voltage of the internal transformer is 1 000 V AC, the maximum rated supply voltage of the switch mode power supply unit can be lower due to the type of rectification. NOTE 3 For higher frequencies, additional requirements can be necessary. However, this document can be used for guidance. This document is applicable to SMPS, converters and inverters without limitation of the rated output subject to an agreement between the purchaser and the manufacturer. NOTE 4 In the context of this document, converters and inverters are considered to be SMPS. This document applies to: a) SMPS incorporating safety isolating transformers providing SELV, PELV, AC or DC output voltage(s) or a combination thereof in accordance with IEC 61140 and IEC 60364-4-41 for use with household and other consumer products, b) SMPS with a maximum output voltage not exceeding 1 000 V AC or 1 415 V ripple-free DC for use with household and other consumer products, except for products covered in a), c) This document can be used for transformers for use in SMPS (see Annex BB). This document does not apply to: - motor-generator sets; - uninterruptible power supplies (UPS) in accordance with the IEC 62040 series; - SMPS covered by IEC 61204-7 (i.e. low-voltage power supply devices DC output, performance characteristics) and DC power and distribution equipment and SMPS for use in applications covered by IEC 61010-1 and IEC 60601-1; - lamp control gear covered by the IEC 61347 series; - external circuits and their components intended to be connected to the input terminals and output terminals of the SMPS; - equipment in accordance with IEC 60065, IEC 60950-1 and IEC 62368-1. This document can also be used for guidance for products not covered by the scope of this document, the scope of IEC 61204-7 or the scope of the IEC 61347 series. This document covers the safety requirements for: [...]

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13-Mar-2025
01-Feb-2022
29.180
2014/35/EU
M/511
CLC/SR 96

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EN IEC 61558-2-12:2025(Main)

Safety of transformers, reactors, power supply units and combination thereof - Part 2-12: Particular requirements and tests for constant voltage transformers and power supply units for constant voltage

SIST EN IEC 61558-2-12:2025

IEC 61558-2-12:2024 is available as IEC 61558-2-12:2024 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 61558-2-12:2024 deals with the safety of constant voltage transformers for general applications and power supply units for constant voltage for general applications. Constant voltage transformers incorporating electronic circuits are also covered by this document. This third edition cancels and replaces the second edition published in 2011. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) adjustment of structure and references in accordance with IEC 61558-1:2017; b) description of constructions moved to IEC 61558-1:2017; c) new symbol for power supply unit with linearly regulated output voltage. It has the status of a group safety publication in accordance with IEC Guide 104.

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