Safety of power transformers, power supply units and similar - Part 2-2: Particular requirements for control transformers

This part of EN 61558 applies to stationary or portable, single-phase or poly-phases, air-cooled control transformers associated or otherwise. It has the status of a group safety publication in accordance with IEC Guide 104. This part 2-2 supplements or modifies the corresponding clauses in EN 61558-1.

Sicherheit von Transformatoren, Netzgeräten und dergleichen - Teil 2-2: Besondere Anforderungen an Steuertransformatoren

Sécurité des transformateurs, blocs d'alimentation et analogues - Partie 2-2: Règles particulières pour les transformateurs de commande

La présente partie 2-2 de la EN 61558 est applicable aux tranformateurs de commande fixes ou mobiles, monophasés ou polyphasés, à refroidissement par air, associés ou non. Elle a le statut de publication groupée de sécurité conformément au Guide CEI 104. La partie 2 complète ou modifie les clauses correspondantes de la EN 61558-1

Safety of power transformers, power supply units and similar - Part 2-2: Particular requirements for control transformers (IEC 61558-2-2:1997)

General Information

Status: Withdrawn
Publication Date: 15-Feb-1998
Withdrawal Date: 31-Dec-2001

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: 01-Feb-2010
Completion Date: 01-Feb-2010

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 EN 61558-2-2:1999 - Safety of power transformers, power supply units and similar -- Part 2-2: Particular requirements for control transformers

Relations

Replaced By: EN 61558-2-2:2007 - Safety of power transformers, power supplies, reactors and similar products - Part 2-2: Particular requirements and tests for control transformers and power supplies incorporating control transformers
Effective Date: 28-Jan-2023

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EN 61558-2-2:1999

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Frequently Asked Questions

What is EN 61558-2-2:1998?

EN 61558-2-2:1998 is a standard published by CLC. Its full title is "Safety of power transformers, power supply units and similar - Part 2-2: Particular requirements for control transformers". This standard covers: This part of EN 61558 applies to stationary or portable, single-phase or poly-phases, air-cooled control transformers associated or otherwise. It has the status of a group safety publication in accordance with IEC Guide 104. This part 2-2 supplements or modifies the corresponding clauses in EN 61558-1.

What is the scope of EN 61558-2-2:1998?

What ICS categories does EN 61558-2-2:1998 belong to?

EN 61558-2-2:1998 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 61558-2-2:1998?

EN 61558-2-2:1998 has the following relationships with other standards: It is inter standard links to EN 61558-2-2:2007. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

Is EN 61558-2-2:1998 a harmonized European standard?

EN 61558-2-2:1998 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 EN 61558-2-2:1998?

EN 61558-2-2:1998 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 61558-2-2:1999

SLOVENSKI SIST EN 61558-2-2:1999
prva izdaja
STANDARD
julij 1999
Safety of power transformers, power supply units and similar - Part 2-2: Particular
requirements for control transformers (IEC 61558-2-2:1997)
ICS 29.180 Referenčna šte
...

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EN IEC 61558-2-9:2025(Main)

Safety of transformers, reactors, power supply units and combinations thereof - Part 2-9: Particular requirements and tests for transformers and power supply units for class III handlamps

SIST EN IEC 61558-2-9:2025

IEC 61558-2-9:2024 is available as IEC 61558-2-9:2024 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 61558-2-9:2024 deals with the safety of transformers for class III handlamps and power supply units incorporating transformers for class III handlamps. 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) addition of a new symbol for power supply unit with linearly regulated output voltage; c) document is not only valid for transformers for tungsten filament handlamps. It has the status of a group safety publication in accordance with IEC Guide 104.

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EN IEC 61558-2-20:2025(Main)

Safety of transformers, reactors, power supply units and combinations thereof - Part 2-20: Particular requirements and tests for small reactors

SIST EN IEC 61558-2-20:2025

IEC 61558-2-20:2022 is available as IEC 61558-2-20:2022 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 61558-2-20:2022 deals with the safety of small reactors for general applications. Small reactors 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: - adjustment of structure and references in accordance with IEC 61558-1:2017. - additional Annex AA with references for characteristic parameter measurements. - additional Annex BB for associated reactors with frequencies above 500 Hz. - additional Annex CC for partial discharge. It has the status of a group safety publication in accordance with IEC Guide 104.

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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
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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 61558-2-6:2025(Main)

Safety of transformers, reactors, power supply units and combinations thereof - Part 2-6: Particular requirements and tests for safety isolating transformers and power supply units incorporating safety isolating transformers for general applications

SIST EN IEC 61558-2-6:2025

IEC 61558-2-6:2021 is available as IEC 61558-2-6:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 61558-2-6:2021 deals with the safety of safety isolating transformers for general applications and power supply units incorporating safety isolating transformers for general applications. Transformers incorporating electronic circuits are also covered by this document. This third edition cancels and replaces the second edition published in 2009. This edition constitutes a technical revision. - adjustment of structure and references in accordance with IEC 61558-1:2017; - description of constructions moved in IEC 61558-1:2017; - 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. This International Standard is to be used in conjunction with IEC 61558-1:2017.

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13-Mar-2025
22-Feb-2022
29.180
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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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EN IEC 61558-2-2:2025(Main)

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

SIST EN IEC 61558-2-2:2025

This part of IEC 61558 deals with the safety of control transformers and power supply units incorporating control transformers. 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 control transformers and power supply units incorporating control transformers. For power supply units (linear) this document is applicable. For switch mode power supply units IEC 61558-2-16 is applicable together with this document. Where two requirements are in conflict, the most severe take precedence. 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 thermal output does not exceed: - 25 kVA for single-phase transformers, - 40 kVA for polyphase transformers; This document is applicable to transformers without limitation of the rated thermal 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 control 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 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 61558-2-13:2025(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 61558-2-14:2025(Main)

Safety of transformers, reactors, power supply units and combinations thereof - Part 2-14: Particular requirements and tests for variable transformers and power supply units incorporating variable transformers for general applications

SIST EN IEC 61558-2-14:2025

This part of IEC 61558 deals with the safety of variable transformers for general applications and power supply units incorporating variable transformers for general applications. Variable transformers incorporating electronic circuits are also covered by this document. NOTE 1 Safety includes electrical, thermal, mechanical and chemical aspects. Unless otherwise specified, from here onward, the term transformer covers variable transformers for general applications and power supply units incorporating variable 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 together with this document. Where two requirements are in conflict, the most severe take precedence. 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 variable dry-type transformers. - variable auto-transformers; - variable separating transformers; - variable isolating transformers; - variable safety isolating 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 operational frequencies do not exceed 500 Hz. The rated output does not exceed: - 40 kVA for single-phase variable auto-transformers; - 200 kVA for poly-phase variable auto-transformers; - 1 kVA for single-phase variable separating transformers; - 5 kVA for poly-phase variable separating transformers; - 25 kVA for single-phase variable isolating transformers; - 40 kVA for poly-phase variable isolating transformers; - 10 kVA for single-phase variable safety isolating transformers; - 16 kVA for poly-phase variable safety isolating transformers. This document is applicable to variable 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. [...]

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Safety of power transformers, power supply units and similar - Part 2-2: Particular requirements for control transformers

Sicherheit von Transformatoren, Netzgeräten und dergleichen - Teil 2-2: Besondere Anforderungen an Steuertransformatoren

Sécurité des transformateurs, blocs d'alimentation et analogues - Partie 2-2: Règles particulières pour les transformateurs de commande

Safety of power transformers, power supply units and similar - Part 2-2: Particular requirements for control transformers (IEC 61558-2-2:1997)

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EN 61558-2-2:1999

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