EN IEC 62477-1:2023

Safety requirements for power electronic converter systems and equipment - Part 1: General

IEC 62477-1:2022 applies to power electronic converter systems (PECS), any specified accessories, and their components for electronic power conversion and electronic power switching, including the means for their control, protection, monitoring and measurement, such as with the main purpose of converting electric power, with rated system voltages not exceeding 1 000 V AC or 1 500 V DC. This document also applies to PECS which intentionally emit or receive radio waves for the purpose of radio communication. This document can also be used as a reference standard for product committees producing product standards for: - adjustable speed electric power drive systems (PDS); - standalone uninterruptible power systems (UPS); - low voltage - stabilized DC power supplies; - bidirectional power converters. For PECS and their specified accessories for which no product standard exists, this document provides minimum requirements for safety aspects. This document has the status of a group safety publication in accordance with IEC Guide 104 for power electronic converter systems for solar, wind, tidal, wave, fuel cell or similar energy sources. According to IEC Guide 104, one of the responsibilities of technical committees is, wherever applicable, to make use of basic safety publications and/or group safety publications in the preparation of their product standards. Guidance for use of this group safety publication for product committees is given in Annex S. This document - establishes a common terminology for safety aspects relating to PECS, - establishes minimum requirements for the coordination of safety aspects of interrelated parts within a PECS, - establishes a common basis for minimum safety requirements for the PECS portion of products that contain PECS, - specifies requirements to reduce risks of fire, electric shock, thermal, energy and mechanical hazards, during use and operation and, where specifically stated, during service and maintenance, and - specifies minimum requirements to reduce risks with respect to PECS designed as pluggable and permanently connected equipment, whether it consists of a system of interconnected units or independent units, subject to installing, operating and maintaining the PECS in the manner prescribed by the manufacturer. This document does not cover - telecommunications apparatus other than power supplies to such apparatus, - functional safety aspects as covered by, for example, IEC 61508 (all parts), and - electrical equipment and systems for railways applications and electr

Sicherheitsanforderungen an Leistungselektronik-Umrichtersysteme und -betriebsmittel - Teil 1: Allgemeines

Exigences de sécurité applicables aux systèmes et matériels électroniques de conversion de puissance - Partie 1: Généralités

L'IEC 62477-1:2022 s'applique aux systèmes électroniques de conversion de puissance (PECS), à tout accessoire spécifié, ainsi qu'à leurs composants pour la conversion de puissance électronique et la commande (ouverture et fermeture) électronique de puissance, y compris les moyens de commande, de protection, de surveillance et de mesure, qui ont pour principale fonction la conversion de puissance électrique, d'une tension système assignée qui ne dépasse pas 1 000 V en courant alternatif ou 1 500 V en courant continu. Le présent document s'applique également aux PECS qui émettent ou reçoivent intentionnellement des ondes radioélectriques à des fins de radiocommunication. Le présent document peut également être utilisé comme norme de référence par les comités de produits qui élaborent des normes de produits applicables aux:  
systèmes d'entraînement électrique de puissance à vitesse variable (PDS, Power Drive Systems);
alimentations sans interruption (ASI) autonomes;
alimentations stabilisées basse tension en courant continu;
convertisseurs de puissance bidirectionnels.  Pour les PECS et leurs accessoires spécifiés pour lesquels il n'existe pas de norme de produits, le présent document spécifie des exigences minimales pour les aspects de sécurité. Le présent document a le statut d'une publication groupée de sécurité conformément au Guide 104 de l'IEC applicable aux systèmes électroniques de conversion de puissance pour énergie solaire, éolienne, des marées, des vagues, des piles à combustible ou sources d'énergie analogues. Conformément au Guide 104 de l'IEC, il incombe aux comités d'études d'utiliser, dans toute la mesure du possible, les publications fondamentales de sécurité et/ou les publications groupées de sécurité pour l'élaboration de leurs normes de produits. Les recommandations relatives à l'utilisation de la présente publication groupée de sécurité pour les comités de produits sont données à l'Annexe S. Le présent document  
établit une terminologie commune applicable aux aspects de sécurité concernant les matériels et les PECS,
établit les exigences minimales pour la coordination des aspects de sécurité des parties interconnectées au sein d'un PECS,
établit une base commune applicable aux exigences minimales de sécurité de la partie du convertisseur électronique de puissance (PEC) des produits qui comprennent un PECS,
spécifie les exigences qui permettent de réduire les risques d'incendie, de choc électrique, les dangers thermiques, mécaniques et dus à l'énergie électrique, en cours d'utilisation et de fonctionnement et, lorsque cela est spécifiquement indiqué, au cours des opérations d'entretien et de maintenance, et

Varnostne zahteve za močnostne elektronske pretvorniške sisteme in opreme - 1. del: Splošno (IEC 62477-1:2022)

Ta del standarda IEC 62477 se nanaša na močnostne električne pretvorniške sisteme (PECS), posebno dodatno opremo in njihove dele za električno močnostno pretvorbo in električno močnostno preklapljanje, vključno s sredstvi za njihov nadzor, zaščito, spremljanje in merjenje, kot z glavnim namenom za pretvorbo električne energije z nazivnimi sistemskimi izmeničnimi napetostmi največ 1000 V oziroma sistemskimi enosmernimi napetostmi največ 1500 V.
Ta dokument se uporablja tudi za električne močnostne pretvorniške sisteme, ki namenoma oddajajo ali sprejemajo radijske valove za namene radijske komunikacije.
Ta dokument lahko kot referenčni standard uporabljajo odbori za proizvode, ki pripravljajo standarde za proizvode za:
• električne pogonske sisteme z nastavljivo hitrostjo (PDS);
• samostojne sisteme za neprekinjeno napajanje (UPS);
• nizkonapetostne napajalnike za stabilizirano napajanje z enosmernim tokom;
• dvosmerne močnostne pretvornike.
Ta dokument določa minimalne varnostne zahteve za močnostne električne pretvorniške sisteme in njihovo posebno dodatno opremo, ki nimajo določenega standarda za proizvod.
Ta dokument ima status publikacije skupinske varnosti, ki je v skladu z vodilom IEC 104 za električne močnostne pretvorniške sisteme na osnovi sonca, vetra, plimovanja, valovanja, gorivnih celic ali podobnih virov.
Glede na vodilo IEC 104 je ena od dolžnosti tehničnih odborov, da pri pripravi standardov za proizvode uporabijo osnovne varnostne publikacije in/ali publikacije skupinske varnosti, če je to mogoče.
Napotki za uporabo te publikacije skupinske varnosti za odbore za proizvode so podani v dodatku S.
Ta dokument
• vzpostavlja skupno terminologijo za varnostne vidike v zvezi z močnostnimi električnimi pretvorniškimi sistemi,
• določa minimalne zahteve za usklajevanje varnostnih vidikov medsebojno povezanih delov znotraj močnostnih električnih pretvorniških sistemov,
• vzpostavlja skupno osnovo za minimalne varnostne zahteve za tiste delov proizvodov, ki vsebujejo močnostne električne pretvorniške sisteme,
• določa zahteve za zmanjšanje tveganja požara, električnega udara, toplotnih, energijskih in mehaničnih tveganj med uporabo, delovanjem ter, kjer je to navedeno, popravilom in vzdrževanjem, in
• določa minimalne zahteve za zmanjšanje tveganja v zvezi z močnostnimi električnimi pretvorniškimi sistemi, zasnovanimi kot oprema, ki se priklopi ali je stalno priklopljena, če je sestavljena iz sistema vzajemno povezanih enot ali samostojnih enot, upoštevajoč namestitev, uporabo in vzdrževanje močnostnih električnih pretvorniških sistemov, na način, ki ga je predpisal proizvajalec.
Ta dokument ne zajema:
• telekomunikacijskih naprav, ki niso napajalniki teh naprav,
• funkcionalne varnosti, ki jo zajema na primer standard IEC 61508 (vsi deli), in
• električne opreme in sistemov za uporabo pri železnici in za elektronska vozila.

General Information

• Status: Published
• Publication Date: 19-Oct-2023
• Withdrawal Date: 17-Jan-2023
• ICS: 29.200 - Rectifiers. Convertors. Stabilized power supply
• Technical Committee: CLC/TC 22X - Power electronics
• Drafting Committee: IEC/TC 22 - IEC_TC_22
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 20-Oct-2023
• Completion Date: 20-Oct-2023
• Directive: 2014/35/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
• Mandate: M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
• Ref Project: SIST EN IEC 62477-1:2024 - Safety requirements for power electronic converter systems and equipment - Part 1: General (IEC 62477-1:2022)

Relations

• Replaces: EN 62477-1:2012 - Safety requirements for power electronic converter systems and equipment - Part 1: General
• Effective Date: 23-Jan-2023
• Replaces: EN 62477-1:2012/A1:2017 - Safety requirements for power electronic converter systems and equipment - Part 1: General
• Effective Date: 26-Jul-2021
• Replaces: EN 62477-1:2012/A12:2021 - Safety requirements for power electronic converter systems and equipment - Part 1: General
• Effective Date: 26-Jul-2021
• Replaces: EN 62477-1:2012/A11:2014 - Safety requirements for power electronic converter systems and equipment - Part 1: General
• Effective Date: 26-Jul-2021
• Corrected By: EN IEC 62477-1:2023/AC:2024-04 - Safety requirements for power electronic converter systems and equipment - Part 1: General
• Effective Date: 23-Apr-2024

Overview

EN IEC 62477-1:2023 (identical to IEC 62477-1:2022 / EN IEC 62477-1:2023) defines safety requirements for power electronic converter systems and equipment (PECS). It applies to PECS, specified accessories and components used for electronic power conversion and switching - including control, protection, monitoring and measurement means - with rated system voltages up to 1 000 V AC or 1 500 V DC. The standard also covers PECS that intentionally emit or receive radio waves for communication and serves as a group safety publication under IEC Guide 104 for converters used with solar, wind, tidal, wave, fuel cell and similar energy sources.

Key topics and technical requirements

• Scope and terminology: establishes a common vocabulary for safety aspects related to PECS, ensuring consistent interpretation across product standards and committees.
• Minimum safety requirements: sets baseline requirements for the PECS portion of products where no dedicated product standard exists.
• Hazard reduction: specifies measures to reduce risks of electric shock, fire, thermal, energy and mechanical hazards during normal operation and, where stated, during service and maintenance.
• Coordination of interrelated parts: requires minimum design coordination between interconnected units and independent units within PECS to ensure overall system safety.
• Installation types: addresses requirements for both pluggable and permanently connected equipment.
• Radio functionality: includes PECS that intentionally use radio waves (e.g., for telemetry or control).
• Guidance for product committees: Annex S offers direction for using this group safety publication when preparing product-specific standards.

Practical applications

EN IEC 62477-1:2023 is applicable to designers, manufacturers and integrators of:

• Adjustable speed electric power drive systems (PDS)
• Standalone uninterruptible power systems (UPS)
• Stabilized low-voltage DC power supplies
• Bidirectional power converters
• Renewable-energy converter systems (solar, wind, tidal, wave, fuel cell)
  It is used to establish minimum safety requirements when no product-specific standard exists, to harmonize safety clauses across product families, and to support risk assessment and compliance activities.

Who should use this standard

• Product committees and standards developers
• Electrical and safety engineers designing PECS and accessories
• OEMs and system integrators of power converters
• Test laboratories and compliance officers verifying low-voltage converter safety

Related standards

Referenced or related documents include IEC Guide 104 (group safety publications), IEC 61508 (functional safety - excluded from this standard), IEC 62109-1 (power converters for photovoltaic systems), and insulation/flammability standards such as IEC 60664-1 and IEC fire-testing standards. These references support coordinated application of safety, insulation coordination and testing practices.

Keywords: EN IEC 62477-1:2023, IEC 62477-1:2022, power electronic converter systems, PECS safety requirements, low-voltage converters, UPS, PDS, renewable energy converters.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2024
Varnostne zahteve za močnostne elektronske pretvorniške sisteme in opreme - 1.
del: Splošno (IEC 62477-1:2022)
Safety requirements for power electronic converter systems and equipment - Part 1:
General (IEC 62477-1:2022)
Sicherheitsanforderungen an Leistungshalbleiter-Umrichtersysteme und -betriebsmittel -
Teil 1: Allgemeines (IEC 62477-1:2022)
Exigences de sécurité applicables aux systèmes et matériels électroniques de
conversion de puissance - Partie 1: Généralités (IEC 62477-1:2022)
Ta slovenski standard je istoveten z: EN IEC 62477-1:2023
ICS:
29.200 Usmerniki. Pretvorniki. Rectifiers. Convertors.
Stabilizirano električno Stabilized power supply
napajanje
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 62477-1

NORME EUROPÉENNE
EUROPÄISCHE NORM October 2023
ICS 29.200 Supersedes EN 62477-1:2012; EN 62477-
1:2012/A11:2014; EN 62477-1:2012/A1:2017; EN 62477-
1:2012/A12:2021
English Version
Safety requirements for power electronic converter systems and
equipment - Part 1: General
(IEC 62477-1:2022)
Exigences de sécurité applicables aux systèmes et Sicherheitsanforderungen an Leistungselektronik-
matériels électroniques de conversion de puissance - Umrichtersysteme und -betriebsmittel - Teil 1: Allgemeines
Partie 1: Généralités (IEC 62477-1:2022)
(IEC 62477-1:2022)
This European Standard was approved by CENELEC on 2023-08-09. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62477-1:2023 E

European foreword
The text of document 22/355/FDIS, future edition 2 of IEC 62477-1, prepared by IEC/TC 22 "Power
electronic systems and equipment" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 62477-1:2023.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2024-05-09
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2026-08-09
document have to be withdrawn
This document supersedes EN 62477-1:2012 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 62477-1:2022 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 60068-1:2013 NOTE Approved as EN 60068-1:2014 (not modified)
IEC 60068-2-14 NOTE Approved as EN IEC 60068-2-14
IEC 60068-2-31:2008 NOTE Approved as EN 60068-2-31:2008 (not modified)
IEC 60073:2002 NOTE Approved as EN 60073:2002 (not modified)
IEC 60085 NOTE Approved as EN 60085
IEC 60112:2020 NOTE Approved as EN IEC 60112:2020 (not modified)
IEC 60204-1:2016 NOTE Approved as EN 60204-1:2018
IEC 60216 (series) NOTE Approved as EN 60216 (series)
IEC 60320-1:2015 NOTE Approved as EN 60320-1:2015 (not modified)
IEC 60332-1-2:2004 NOTE Approved as EN 60332-1-2:2004 (not modified) + A11:2016
IEC 60332-1-2:2004/A1:2015 NOTE Approved as EN 60332-1-2:2004/A1:2015 (not modified)
IEC 60332-1-3:2004 NOTE Approved as EN 60332-1-3:2004 (not modified)
IEC 60332-1-3:2004/A1:2015 NOTE Approved as EN 60332-1-3:2004/A1:2015 (not modified)
IEC 60332-2-2:2004 NOTE Approved as EN 60332-2-2:2004 (not modified)
IEC 60364-1:2005 NOTE Approved as HD 60364-1:2008 + A11:2017
IEC 60364-4-44:2007 NOTE Approved as HD 60364-4-444:2010
IEC 60364-4-44:2007/A1:2015 NOTE Approved as HD 60364-4-443:2016
IEC 60364-5-52:2009 NOTE Approved as HD 60364-5-52:2011 + A11:2017
IEC 60445:2021 NOTE Approved as EN IEC 60445:2021 (not modified)
IEC 60695-10-3:2016 NOTE Approved as EN 60695-10-3:2016 (not modified)
IEC 60695-11-5:2016 NOTE Approved as EN 60695-11-5:2017 (not modified)
IEC 60695-11-10:2013 NOTE Approved as EN 60695-11-10:2013 (not modified)
IEC 60721 (series) NOTE Approved as EN 60721 (series)
IEC 60865 (series) NOTE Approved as EN 60865 (series)
IEC 60865-1 NOTE Approved as EN 60865-1
IEC 60909 (series) NOTE Approved as EN 60909 (series)
IEC 60909-0:2016 NOTE Approved as EN 60909-0:2016 (not modified)
IEC 60947 (series) NOTE Approved as EN IEC 60947 (series)
IEC 60947-1:2020 NOTE Approved as EN IEC 60947-1:2021 (not modified)
IEC 60947-2:2016 NOTE Approved as EN 60947-2:2017 (not modified)
IEC 60947-2:2016/A1:2019 NOTE Approved as EN 60947-2:2017/A1:2020 (not modified)
IEC 60947-6-1:2021 NOTE Approved as EN IEC 60947-6-1:2023 (not modified)
IEC 60691 NOTE Approved as EN 60691
IEC 61082-1 NOTE Approved as EN 61082-1
IEC 61084 (series) NOTE Approved as EN IEC 61084 (series)
IEC 61140:2016 NOTE Approved as EN 61140:2016 (not modified)
IEC 61148:2011 NOTE Approved as EN 61148:2012 (not modified)
IEC 61386 (series) NOTE Approved as EN 61386 (series)
IEC 61439-1:2020 NOTE Approved as EN IEC 61439-1:2021 (not modified)
IEC 61508 (series) NOTE Approved as EN 61508 (series)
IEC 61558 (series) NOTE Approved as EN 61558 (series)
IEC 61643-11:2011 NOTE Approved as EN 61643-11:2012 + A11:2018
IEC 61643-12 NOTE Approved as CLC/TS 61643-12
IEC 62311:2019 NOTE Approved as EN IEC 62311:2020 (not modified)
IEC/IEEE 82079-1:2019 NOTE Approved as EN IEC/IEEE 82079-1:2020 (not modified)
ISO 9773:1998 NOTE Approved as EN ISO 9773:1998 (not modified)
IEC 60127 (series) NOTE Approved as EN IEC 60127 (series)
IEC 60309-1 NOTE Approved as EN IEC 60309-1
IEC 60317 (series) NOTE Approved as EN IEC 60317 (series)
IEC 60730 (series) NOTE Approved as EN IEC 60730 (series)
IEC 60931 (series) NOTE Approved as EN 60931 (series)
IEC 60940 NOTE Approved as EN 60940
IEC 60947 (series) NOTE Approved as EN IEC 60947 (series)
IEC 60691 NOTE Approved as EN 60691
IEC 61008 (series) NOTE Approved as EN 61008 (series)
IEC 61009 (series) NOTE Approved as EN 61009 (series)
IEC 61010-1 NOTE Approved as EN 61010-1
IEC 61051-2 NOTE Approved as EN IEC 61051-2
IEC 61058-1 NOTE Approved as EN IEC 61058-1
IEC 61071 NOTE Approved as EN 61071
IEC 61439 (series) NOTE Approved as EN IEC 61439 (series)
IEC 61558-2-16 NOTE Approved as EN IEC 61558-2-16
IEC 61810-1 NOTE Approved as EN 61810-1
IEC 61984 NOTE Approved as EN 61984
IEC 62368-1:2018 NOTE Approved as EN IEC 62368-1:2020 (not modified) + A11:2020
IEC 62423 NOTE Approved as EN 62423
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60050-112 - International Electrotechnical Vocabulary - - -
Part 112: Quantities and units
IEC 60050-113 - International Electrotechnical Vocabulary - - -
Part 113: Physics for electrotechnology
IEC 60050-114 - International Electrotechnical Vocabulary - - -
Part 114: Electrochemistry
IEC 60050-151 - International Electrotechnical Vocabulary - - -
Part 151: Electrical and magnetic devices
IEC 60050-161 - International Electrotechnical Vocabulary. - -
Chapter 161: Electromagnetic compatibility
IEC 60050-192 - International electrotechnical vocabulary - - -
Part 192: Dependability
IEC 60050-426 - International Electrotechnical Vocabulary - -
(IEV) - Part 426: Explosive atmospheres
IEC 60050-441 - International Electrotechnical Vocabulary. - -
Switchgear, controlgear and fuses
IEC 60050-442 - International Electrotechnical Vocabulary - - -
Part 442: Electrical accessories
IEC 60050-551 - International Electrotechnical Vocabulary - - -
Part 551: Power electronics
IEC 60050-601 - International Electrotechnical Vocabulary. - -
Chapter 601: Generation, transmission and
distribution of electricity - General
IEC 60050-826 - International Electrotechnical Vocabulary - - -
Part 826: Electrical installations
IEC 60068-2-2 2007 Environmental testing - Part 2-2: Tests - Test EN 60068-2-2 2007
B: Dry heat
IEC 60068-2-6 2007 Environmental testing - Part 2-6: Tests - Test EN 60068-2-6 2008
Fc: Vibration (sinusoidal)
Publication Year Title EN/HD Year
IEC 60068-2-52 2017 Environmental testing - Part 2-52: Tests ¿ EN IEC 60068-2-52 2018
Test Kb: Salt mist, cyclic (sodium chloride
solution)
IEC 60068-2-68 1994 Environmental testing - Part 2-68: Tests - EN 60068-2-68 1996
Test L: Dust and sand
IEC 60068-2-78 2012 Environmental testing - Part 2-78: Tests - EN 60068-2-78 2013
Test Cab: Damp heat, steady state
IEC 60320 series Appliance couplers for household and similar - -
general purposes
IEC 60364 series Low-voltage electrical installations HD 60364 series
IEC 60364-4-41 2005 Low-voltage electrical installations - Part 4- HD 60364-4-41 2017
(mod) 41: Protection for safety - Protection against
electric shock
+ A1 2017
- - + A11 2017
- - + A12 2019
IEC 60364-5-54 2011 Low-voltage electrical installations - Part 5- HD 60364-5-54 2011
54: Selection and erection of electrical
equipment - Earthing arrangements and
protective conductors
- - + A11 2017
+ A1 2021 + A1 2022
IEC 60384-14 2013 Fixed capacitors for use in electronic EN 60384-14 2013
equipment - Part 14: Sectional specification -
Fixed capacitors for electromagnetic
interference suppression and connection to
the supply mains
IEC 60417 - Graphical symbols for use on equipment. - -
Index, survey and compilation of the single
sheets.
IEC 60529 1989 Degrees of protection provided by enclosures EN 60529 1991
(IP Code)
- - + corrigendum May 1993
+ A1 1999 + A1 2000
+ A2 2013 + A2 2013
IEC 60617 - Standard data element types with associated - -
classification scheme for electric components
- Part 4: IEC reference collection of standard
data element types and component classes
IEC 60664-1 2020 Insulation coordination for equipment within EN IEC 60664-1 2020
low-voltage supply systems - Part 1:
Principles, requirements and tests
IEC 60664-3 2016 Insulation coordination for equipment within EN 60664-3 2017
low-voltage systems - Part 3: Use of coating,
potting or moulding for protection against
pollution
Publication Year Title EN/HD Year
IEC 60664-4 2005 Insulation coordination for equipment within EN 60664-4 2006
low-voltage systems - Part 4: Consideration
of high-frequency voltage stress
- - + corrigendum Oct. 2006
IEC 60695-2-10 2013 Fire hazard testing - Part 2-10: Glowing/hot- EN 60695-2-10 2013
wire based test methods - Glow-wire
apparatus and common test procedure
IEC 60695-2-11 2021 Fire hazard testing - Part 2-11: Glowing/hot- EN IEC 60695-2-11 2021
wire based test methods - Glow-wire
flammability test method for end products
(GWEPT)
IEC 60695-2-13 2010 Fire hazard testing - Part 2-13: Glowing/hot- EN 60695-2-13 2010
wire based test methods - Glow-wire ignition
temperature (GWIT) test method for
materials
+ A1 2014 + A1 2014
IEC 60695-10-2 2014 Fire hazard testing - Part 10-2: Abnormal EN 60695-10-2 2014
heat - Ball pressure test method
IEC 60695-11-20 2015 Fire hazard testing - Part 11-20: Test flames - EN 60695-11-20 2015
500 W flame test method
+ A1 1995 - -
+ A2 1996 - -
IEC 60721-3-3 1994 Classification of environmental conditions - - -
Part 3: Classification of groups of
environmental parameters and their
severities - Section 3: Stationary use at
weatherprotected locations
+ A1 1995 - -
+ A2 1996 - -
IEC 60721-3-4 1995 Classification of environmental conditions – - -
Part 3: Classification of groups of
environmental parameters and their
severities – Section 4: Stationary use at non-
weatherprotected locations
+ A1 1996 - -
IEC 60730-1 2013 Automatic electrical controls – Part 1: EN 60730-1 2016
(mod) General requirements
+ A1 2015 + A1 2019
+ A2 2020 + A2 2022
IEC 60738-1-1 2008 Thermistors – Directly heated positive step- EN 60738-1-1 2008
function temperature coefficient – Part 1-1:
Blank detail specification – Current limiting
application – Assessment leve EZ
IEC 60755 2017 General safety requirements for residual - -
current operated protective devices
IEC 60799 2018 Electrical accessories – Cord sets and EN IEC 60799 2021
interconnection cord sets
Publication Year Title EN/HD Year
IEC 60947-7 series Low-voltage switchgear and controlgear EN 60947-7 series
IEC 60949 1988 Calculation of thermally permissible short- - -
circuit currents, taking into account non-
adiabatic heating effects
+ A1 2008 - -
IEC 60990 2016 Methods of measurement of touch current EN 60990 2016
and protective conductor current
IEC 61032 1997 Protection of persons and equipment by EN 61032 1998
enclosures - Probes for verification
IEC 61180 2016 High-voltage test techniques for low-voltage EN 61180 2016
equipment - Definitions, test and procedure
requirements, test equipment
IEC 61189-3 2007 Test methods for electrical materials, printed EN 61189-3 2008
boards and other interconnection structures
and assemblies - Part 3: Test methods for
interconnection structures (printed boards)
IEC 61204-7 2016 Low-voltage switch mode power supplies - EN IEC 61204-7 2018
Part 7: Safety requirements
IEC 61558-1 2017 Safety of transformers, reactors, power EN IEC 61558-1 2019
supply units and combinations thereof - Part
1: General requirements and tests
IEC 62109-1 2010 Safety of power converters for use in - -
photovoltaic power systems - Part 1: General
requirements
ISO/IEC Guide 2014 Safety aspects - Guidelines for their inclusion - -
51 in standards
IEC Guide 104 2019 The preparation of safety publications and - -
the use of basic safety publications and
group safety publications
IEC Guide 116 2018 Guidelines for safety related risk assessment - -
and risk reduction for low voltage equipment
ISO 3746 2010 Acoustics - Determination of sound power EN ISO 3746 2010
levels and sound energy levels of noise
sources using sound pressure - Survey
method using an enveloping measurement
surface over a reflecting plane
ISO 3864 series Safety colours and safety signs - -
ISO 3864-1 2011 Graphical symbols - Safety colours and - -
safety signs - Part 1: Design principles for
safety signs and safety markings
ISO 7000 - Graphical symbols for use on equipment_- - -
Registered symbols
ISO 7010 - Graphical symbols - Safety colours and - -
safety signs - Registered safety signs
ISO 9614-1 1993 Acoustics - Determination of sound power EN ISO 9614-1 2009
levels of noise sources using sound intensity
- Part 1: Measurement at discrete points

IEC 62477-1 ®
Edition 2.0 2022-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ

Safety requirements for power electronic converter systems and equipment –

Part 1: General
Exigences de sécurité applicables aux systèmes et matériels électroniques de

conversion de puissance –
Partie 1: Généralités
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.200 ISBN 978-2-8322-2199-0

– 2 – IEC 62477-1:2022 © IEC 2022
CONTENTS
FOREWORD . 11
INTRODUCTION . 14
1 Scope . 16
2 Normative references . 17
3 Terms and definitions . 20
4 Protection against hazards . 33
4.1 General . 33
4.2 Single fault conditions and abnormal operating conditions . 33
4.3 Short-circuit and overload protection . 34
4.3.1 General . 34
4.3.2 Input short-circuit withstand strength and output short-circuit current

ability . 36
4.3.3 Short-circuit coordination (backup protection) . 37
4.3.4 Protection by several devices . 37
4.4 Protection against electric shock . 37
4.4.1 General . 37
4.4.2 Decisive voltage class . 40
4.4.3 Means for basic protection (protection against direct contact) . 44
4.4.4 Means for fault protection (protection against indirect contact) . 45
4.4.5 Means for enhanced protection . 55
4.4.6 Protective means for equipment classes . 56
4.4.7 Insulation . 58
4.4.8 Compatibility with residual current-operated protective devices (RCD) . 75
4.4.9 Capacitor discharge . 76
4.5 Protection against electrical energy hazards . 76
4.5.1 General access areas . 76
4.5.2 Service access areas . 77
4.6 Protection against fire and thermal hazards . 77
4.6.1 Circuits representing a fire hazard . 77
4.6.2 Components representing a fire hazard . 77
4.6.3 Fire enclosures . 79
4.6.4 Temperature limits . 83
4.6.5 Limited power sources . 86
4.7 Protection against mechanical hazards . 87
4.7.1 General . 87
4.7.2 Specific requirements for liquid cooled PECS . 88
4.7.3 Mechanical hazards from rotating parts . 89
4.7.4 Sharp edges . 90
4.8 PECS with multiple sources of supply . 90
4.9 Protection against environmental stresses . 91
4.10 Protection against excessive acoustic noise hazards . 92
4.11 Wiring and connections . 93
4.11.1 General . 93
4.11.2 Insulation of conductors . 93
4.11.3 Stranded wire . 95
4.11.4 Routing and clamping . 95
4.11.5 Identification of conductors and terminals . 95

IEC 62477-1:2022 © IEC 2022 – 3 –
4.11.6 Splices and connections . 96
4.11.7 Accessible connections . 96
4.11.8 Interconnections between parts of the PECS . 97
4.11.9 Supply connections. 97
4.11.10 Field wiring terminals and internal terminals . 99
4.11.11 Means for shield connection of shielded wire or shielded cable . 101
4.12 Enclosures . 101
4.12.1 General . 101
4.12.2 Handles and manual controls . 102
4.12.3 Cast metal . 102
4.12.4 Sheet metal . 103
4.12.5 Stability requirement for enclosure. 105
4.12.6 Strain relief . 106
4.12.7 Polymeric enclosure stress relief . 106
4.12.8 Polymeric enclosure UV resistance . 106
4.13 Components . 106
4.13.1 General . 106
4.13.2 PTC thermistors . 107
4.13.3 Mains supply cords . 107
4.13.4 Capacitors and RC units bridging insulation . 107
4.13.5 Wound components . 107
4.13.6 Plug and socket-outlets . 108
4.14 Protection against electromagnetic fields . 108
5 Test requirements . 108
5.1 General . 108
5.1.1 Test objectives and classification . 108
5.1.2 Selection of test samples . 108
5.1.3 Sequence of tests . 108
5.1.4 Earthing conditions . 109
5.1.5 General conditions for tests . 109
5.1.6 Compliance . 110
5.1.7 Test overview . 110
5.2 Test specifications . 112
5.2.1 Visual inspection (type test and routine test) . 112
5.2.2 Mechanical tests . 112
5.2.3 Electrical tests . 121
5.2.4 Abnormal operation and simulated faults tests . 141
5.2.5 Material tests . 148
5.2.6 Environmental tests (type tests) . 153
5.2.7 Hydrostatic pressure test (type test, routine test) . 157
5.2.8 Electromagnetic fields (EMF) . 158
6 Information and marking requirements . 158
6.1 General . 158
6.2 Information for selection . 160
6.2.1 General . 160
6.2.2 Instructions and markings pertaining to accessories . 162
6.3 Information for installation and commissioning . 162
6.3.1 General . 162
6.3.2 Mechanical considerations . 162

– 4 – IEC 62477-1:2022 © IEC 2022
6.3.3 Environment . 162
6.3.4 Handling and mounting . 162
6.3.5 Enclosure temperature. 163
6.3.6 Open type PECS . 163
6.3.7 Connections . 163
6.3.8 Commissioning . 165
6.3.9 Protection requirements . 165
6.4 Information for intended use . 167
6.4.1 General . 167
6.4.2 Adjustment . 167
6.4.3 Labels, signs, symbols and signals . 168
6.4.4 Hot surfaces . 170
6.4.5 Control and device marking . 170
6.5 Supplementary information . 170
6.5.1 Maintenance . 170
6.5.2 Capacitor discharge . 171
6.5.3 Auto restart/bypass connection . 171
6.5.4 Other hazards . 171
6.5.5 PECS with multiple sources of supply . 171
6.5.6 Replaceable fuses in neutral of single-phase PECS . 171
Annex A (normative) Additional information for protection against electric shock . 173
A.1 General . 173
A.2 Protection by means of DVC As . 173
A.3 Protection by means of protective impedance . 173
A.4 Protection by using limited voltages . 174
A.5 Evaluation of the working voltage of circuits . 175
A.5.1 General . 175
A.5.2 Classification of the working voltage . 175
A.5.3 AC working voltage . 176
A.5.4 DC working voltage. 176
A.5.5 Pulsating working voltage . 177
A.6 The concept of protective means according to 4.4 . 178
A.6.1 General . 178
A.6.2 Examples of the use of elements of protective means . 178
Annex B (informative) Considerations for the reduction of the pollution degree . 180
B.1 General . 180
B.2 Factors influencing the pollution degree . 180
B.3 Reduction of influencing factors . 180
Annex C (informative) Symbols referred to in this document . 181
C.1 Symbols used . 181
C.2 Determination of contrast . 182
Annex D (normative) Evaluation of clearance and creepage distances . 184
D.1 Measurement . 184
D.2 Relationship of measurement to pollution degree . 184
D.3 Examples . 185
Annex E (normative) Altitude correction for clearances . 191
E.1 Correction factor for clearances at altitudes above 2 000 m . 191
E.2 Test voltages for verifying clearances at different altitudes . 191

IEC 62477-1:2022 © IEC 2022 – 5 –
Annex F (normative) Clearance and creepage distance determination for frequencies
greater than 30 kHz . 193
F.1 General influence of the frequency on the withstand characteristics . 193
F.2 Clearance . 193
F.2.1 General . 193
F.2.2 Clearance for inhomogenous fields . 194
F.2.3 Clearance for approximately homogenous fields . 195
F.3 Creepage distance . 196
F.4 Solid insulation . 197
F.4.1 General . 197
F.4.2 Approximately uniform field distribution without air gaps or voids . 197
F.4.3 Other cases . 198
Annex G (informative) Cross-sections of round conductors . 199
Annex H (informative) Guidelines for RCD compatibility . 200
H.1 Selection of RCD type . 200
H.2 Fault current waveforms . 201
Annex I (informative) Examples of overvoltage category reduction . 204
I.1 General . 204
I.2 Protection to the surroundings (see 4.4.7.2) . 204
I.2.1 Circuits connected to mains supply (see 4.4.7.2.3) . 204
I.2.2 Circuits connected to the non-mains supply (see 4.4.7.2.4) . 207
I.2.3 Protection between circuits (see 4.4.7.2.7) . 207
I.3 Functional insulation (see 4.4.7.3) . 208
I.4 Further examples . 208
I.5 Circuits with multiple supplies (see 4.4.7.2.1) . 209
Annex J (informative) Burn thresholds for touchable surfaces . 210
J.1 General . 210
J.2 Burn thresholds. 210
Annex K (informative) Table of electrochemical potentials . 214
Annex L (informative) Measuring instrument for touch current measurements . 215
L.1 Measuring instrument 1 . 215
L.2 Measuring instrument 2 . 215
L.3 Measuring instrument 3 . 216
Annex M (normative) Test probes for determining access . 217
Annex N (informative) Guidance regarding short-circuit current. 220
N.1 General . 220
N.2 Coordination of short-circuit current . 221
N.2.1 General . 221
N.2.2 Conditional short-circuit current (I ) and minimum required prospective
cc
short-circuit current (I ) . 221
cp, mr
N.2.3 Short-time withstand current (I ) . 223
cw
N.3 Guidance for specification of short-circuit current and short-circuit protective
device . 224
N.3.1 General . 224
N.3.2 Example 1: Two or more PECS with different ratings . 225
N.3.3 Specification of I . 226
cc
N.3.4 Specification of I . 226
cw
– 6 – IEC 62477-1:2022 © IEC 2022
N.3.5 Example 2: One PECS with more than one rating . 227
N.3.6 Additional explanation on terms, definitions and specifications . 228
N.4 Short-circuit rating and single fault conditions testing . 229
N.4.1 General . 229
N.4.2 Exemption from short-time withstand current testing . 231
N.5 Guideline for short-circuit analysis . 231
Annex O (informative) Guidelines for determination of clearance and creepage
distances . 232
O.1 Guideline for determination of clearances . 232
O.2 Guideline for determination of creepage distances . 233
O.3 Minimum spacings within solid insulation or similar . 233
Annex P (informative) Protection of persons against electromagnetic fields for
frequencies from 0 Hz up to 300 GHz . 235
P.1 General influence of electromagnetic fields to persons . 235
P.1.1 General . 235
P.1.2 Low-frequency electric fields effects (1 Hz to 100 kHz) . 235
P.1.3 Low-frequency magnetic fields effects (1 Hz to 100 kHz) . 235
P.1.4 Low-frequency electric and magnetic fields effects . 235
P.1.5 High-frequency electromagnetic fields effects (100 kHz to 300 GHz) . 235
P.1.6 Current knowledge on low-level effects . 236
P.1.7 Biological effects versus adverse health effects . 236
P.1.8 Influence of EMF on passive and active medical implants . 236
P.2 Requirements from ICNIRP LF guidelines against exposure to EMF . 236
P.2.1 Adoption of exposure limits from ICNIRP . 236
P.2.2 Limits of EMF exposure for transportation and storage . 238
P.3 Protection of persons against exposure of EMF . 238
P.3.1 General . 238
P.3.2 EMF requirements for general public access areas . 239
P.3.3 EMF requirements for general access areas, service access areas and
restricted access areas . 239
P.3.4 EMF requirements for transportation and storage . 239
P.4 Electromagnetic fields (EMF) test (type test) . 240
P.4.1 General test set up for EMF . 240
P.4.2 EMF test (type test) . 240
P.5 Electromagnetic f
...

SLOVENSKI STANDARD
01-april-2024
Varnostne zahteve za močnostne elektronike pretvorniške sisteme in opreme - 1.
del: Splošno (IEC 62477-1:2022)
Safety requirements for power electronic converter systems and equipment - Part 1:
General (IEC 62477-1:2022)
Sicherheitsanforderungen an Leistungshalbleiter-Umrichtersysteme und -betriebsmittel -
Teil 1: Allgemeines (IEC 62477-1:2022)
Exigences de sécurité applicables aux systèmes et matériels électroniques de
conversion de puissance - Partie 1: Généralités (IEC 62477-1:2022)
Ta slovenski standard je istoveten z: EN IEC 62477-1:2023
ICS:
29.200 Usmerniki. Pretvorniki. Rectifiers. Convertors.
Stabilizirano električno Stabilized power supply
napajanje
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 62477-1

NORME EUROPÉENNE
EUROPÄISCHE NORM October 2023
ICS 29.200 Supersedes EN 62477-1:2012; EN 62477-
1:2012/A11:2014; EN 62477-1:2012/A1:2017; EN 62477-
1:2012/A12:2021
English Version
Safety requirements for power electronic converter systems and
equipment - Part 1: General
(IEC 62477-1:2022)
Exigences de sécurité applicables aux systèmes et Sicherheitsanforderungen an Leistungselektronik-
matériels électroniques de conversion de puissance - Umrichtersysteme und -betriebsmittel - Teil 1: Allgemeines
Partie 1: Généralités (IEC 62477-1:2022)
(IEC 62477-1:2022)
This European Standard was approved by CENELEC on 2023-08-09. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62477-1:2023 E

European foreword
The text of document 22/355/FDIS, future edition 2 of IEC 62477-1, prepared by IEC/TC 22 "Power
electronic systems and equipment" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 62477-1:2023.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2024-05-09
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2026-08-09
document have to be withdrawn
This document supersedes EN 62477-1:2012 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 62477-1:2022 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 60068-1:2013 NOTE Approved as EN 60068-1:2014 (not modified)
IEC 60068-2-14 NOTE Approved as EN IEC 60068-2-14
IEC 60068-2-31:2008 NOTE Approved as EN 60068-2-31:2008 (not modified)
IEC 60073:2002 NOTE Approved as EN 60073:2002 (not modified)
IEC 60085 NOTE Approved as EN 60085
IEC 60112:2020 NOTE Approved as EN IEC 60112:2020 (not modified)
IEC 60204-1:2016 NOTE Approved as EN 60204-1:2018
IEC 60216 (series) NOTE Approved as EN 60216 (series)
IEC 60320-1:2015 NOTE Approved as EN 60320-1:2015 (not modified)
IEC 60332-1-2:2004 NOTE Approved as EN 60332-1-2:2004 (not modified) + A11:2016
IEC 60332-1-2:2004/A1:2015 NOTE Approved as EN 60332-1-2:2004/A1:2015 (not modified)
IEC 60332-1-3:2004 NOTE Approved as EN 60332-1-3:2004 (not modified)
IEC 60332-1-3:2004/A1:2015 NOTE Approved as EN 60332-1-3:2004/A1:2015 (not modified)
IEC 60332-2-2:2004 NOTE Approved as EN 60332-2-2:2004 (not modified)
IEC 60364-1:2005 NOTE Approved as HD 60364-1:2008 + A11:2017
IEC 60364-4-44:2007 NOTE Approved as HD 60364-4-444:2010
IEC 60364-4-44:2007/A1:2015 NOTE Approved as HD 60364-4-443:2016
IEC 60364-5-52:2009 NOTE Approved as HD 60364-5-52:2011 + A11:2017
IEC 60445:2021 NOTE Approved as EN IEC 60445:2021 (not modified)
IEC 60695-10-3:2016 NOTE Approved as EN 60695-10-3:2016 (not modified)
IEC 60695-11-5:2016 NOTE Approved as EN 60695-11-5:2017 (not modified)
IEC 60695-11-10:2013 NOTE Approved as EN 60695-11-10:2013 (not modified)
IEC 60721 (series) NOTE Approved as EN 60721 (series)
IEC 60865 (series) NOTE Approved as EN 60865 (series)
IEC 60865-1 NOTE Approved as EN 60865-1
IEC 60909 (series) NOTE Approved as EN 60909 (series)
IEC 60909-0:2016 NOTE Approved as EN 60909-0:2016 (not modified)
IEC 60947 (series) NOTE Approved as EN IEC 60947 (series)
IEC 60947-1:2020 NOTE Approved as EN IEC 60947-1:2021 (not modified)
IEC 60947-2:2016 NOTE Approved as EN 60947-2:2017 (not modified)
IEC 60947-2:2016/A1:2019 NOTE Approved as EN 60947-2:2017/A1:2020 (not modified)
IEC 60947-6-1:2021 NOTE Approved as EN IEC 60947-6-1:2023 (not modified)
IEC 60691 NOTE Approved as EN 60691
IEC 61082-1 NOTE Approved as EN 61082-1
IEC 61084 (series) NOTE Approved as EN IEC 61084 (series)
IEC 61140:2016 NOTE Approved as EN 61140:2016 (not modified)
IEC 61148:2011 NOTE Approved as EN 61148:2012 (not modified)
IEC 61386 (series) NOTE Approved as EN 61386 (series)
IEC 61439-1:2020 NOTE Approved as EN IEC 61439-1:2021 (not modified)
IEC 61508 (series) NOTE Approved as EN 61508 (series)
IEC 61558 (series) NOTE Approved as EN 61558 (series)
IEC 61643-11:2011 NOTE Approved as EN 61643-11:2012 + A11:2018
IEC 61643-12 NOTE Approved as CLC/TS 61643-12
IEC 62311:2019 NOTE Approved as EN IEC 62311:2020 (not modified)
IEC/IEEE 82079-1:2019 NOTE Approved as EN IEC/IEEE 82079-1:2020 (not modified)
ISO 9773:1998 NOTE Approved as EN ISO 9773:1998 (not modified)
IEC 60127 (series) NOTE Approved as EN IEC 60127 (series)
IEC 60309-1 NOTE Approved as EN IEC 60309-1
IEC 60317 (series) NOTE Approved as EN IEC 60317 (series)
IEC 60730 (series) NOTE Approved as EN IEC 60730 (series)
IEC 60931 (series) NOTE Approved as EN 60931 (series)
IEC 60940 NOTE Approved as EN 60940
IEC 60947 (series) NOTE Approved as EN IEC 60947 (series)
IEC 60691 NOTE Approved as EN 60691
IEC 61008 (series) NOTE Approved as EN 61008 (series)
IEC 61009 (series) NOTE Approved as EN 61009 (series)
IEC 61010-1 NOTE Approved as EN 61010-1
IEC 61051-2 NOTE Approved as EN IEC 61051-2
IEC 61058-1 NOTE Approved as EN IEC 61058-1
IEC 61071 NOTE Approved as EN 61071
IEC 61439 (series) NOTE Approved as EN IEC 61439 (series)
IEC 61558-2-16 NOTE Approved as EN IEC 61558-2-16
IEC 61810-1 NOTE Approved as EN 61810-1
IEC 61984 NOTE Approved as EN 61984
IEC 62368-1:2018 NOTE Approved as EN IEC 62368-1:2020 (not modified) + A11:2020
IEC 62423 NOTE Approved as EN 62423
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60050-112 - International Electrotechnical Vocabulary - - -
Part 112: Quantities and units
IEC 60050-113 - International Electrotechnical Vocabulary - - -
Part 113: Physics for electrotechnology
IEC 60050-114 - International Electrotechnical Vocabulary - - -
Part 114: Electrochemistry
IEC 60050-151 - International Electrotechnical Vocabulary - - -
Part 151: Electrical and magnetic devices
IEC 60050-161 - International Electrotechnical Vocabulary. - -
Chapter 161: Electromagnetic compatibility
IEC 60050-192 - International electrotechnical vocabulary - - -
Part 192: Dependability
IEC 60050-426 - International Electrotechnical Vocabulary - -
(IEV) - Part 426: Explosive atmospheres
IEC 60050-441 - International Electrotechnical Vocabulary. - -
Switchgear, controlgear and fuses
IEC 60050-442 - International Electrotechnical Vocabulary - - -
Part 442: Electrical accessories
IEC 60050-551 - International Electrotechnical Vocabulary - - -
Part 551: Power electronics
IEC 60050-601 - International Electrotechnical Vocabulary. - -
Chapter 601: Generation, transmission and
distribution of electricity - General
IEC 60050-826 - International Electrotechnical Vocabulary - - -
Part 826: Electrical installations
IEC 60068-2-2 2007 Environmental testing - Part 2-2: Tests - Test EN 60068-2-2 2007
B: Dry heat
IEC 60068-2-6 2007 Environmental testing - Part 2-6: Tests - Test EN 60068-2-6 2008
Fc: Vibration (sinusoidal)
Publication Year Title EN/HD Year
IEC 60068-2-52 2017 Environmental testing - Part 2-52: Tests ¿ EN IEC 60068-2-52 2018
Test Kb: Salt mist, cyclic (sodium chloride
solution)
IEC 60068-2-68 1994 Environmental testing - Part 2-68: Tests - EN 60068-2-68 1996
Test L: Dust and sand
IEC 60068-2-78 2012 Environmental testing - Part 2-78: Tests - EN 60068-2-78 2013
Test Cab: Damp heat, steady state
IEC 60320 series Appliance couplers for household and similar - -
general purposes
IEC 60364 series Low-voltage electrical installations HD 60364 series
IEC 60364-4-41 2005 Low-voltage electrical installations - Part 4- HD 60364-4-41 2017
(mod) 41: Protection for safety - Protection against
electric shock
+ A1 2017
- - + A11 2017
- - + A12 2019
IEC 60364-5-54 2011 Low-voltage electrical installations - Part 5- HD 60364-5-54 2011
54: Selection and erection of electrical
equipment - Earthing arrangements and
protective conductors
- - + A11 2017
+ A1 2021 + A1 2022
IEC 60384-14 2013 Fixed capacitors for use in electronic EN 60384-14 2013
equipment - Part 14: Sectional specification -
Fixed capacitors for electromagnetic
interference suppression and connection to
the supply mains
IEC 60417 - Graphical symbols for use on equipment. - -
Index, survey and compilation of the single
sheets.
IEC 60529 1989 Degrees of protection provided by enclosures EN 60529 1991
(IP Code)
- - + corrigendum May 1993
+ A1 1999 + A1 2000
+ A2 2013 + A2 2013
IEC 60617 - Standard data element types with associated - -
classification scheme for electric components
- Part 4: IEC reference collection of standard
data element types and component classes
IEC 60664-1 2020 Insulation coordination for equipment within EN IEC 60664-1 2020
low-voltage supply systems - Part 1:
Principles, requirements and tests
IEC 60664-3 2016 Insulation coordination for equipment within EN 60664-3 2017
low-voltage systems - Part 3: Use of coating,
potting or moulding for protection against
pollution
Publication Year Title EN/HD Year
IEC 60664-4 2005 Insulation coordination for equipment within EN 60664-4 2006
low-voltage systems - Part 4: Consideration
of high-frequency voltage stress
- - + corrigendum Oct. 2006
IEC 60695-2-10 2013 Fire hazard testing - Part 2-10: Glowing/hot- EN 60695-2-10 2013
wire based test methods - Glow-wire
apparatus and common test procedure
IEC 60695-2-11 2021 Fire hazard testing - Part 2-11: Glowing/hot- EN IEC 60695-2-11 2021
wire based test methods - Glow-wire
flammability test method for end products
(GWEPT)
IEC 60695-2-13 2010 Fire hazard testing - Part 2-13: Glowing/hot- EN 60695-2-13 2010
wire based test methods - Glow-wire ignition
temperature (GWIT) test method for
materials
+ A1 2014 + A1 2014
IEC 60695-10-2 2014 Fire hazard testing - Part 10-2: Abnormal EN 60695-10-2 2014
heat - Ball pressure test method
IEC 60695-11-20 2015 Fire hazard testing - Part 11-20: Test flames - EN 60695-11-20 2015
500 W flame test method
+ A1 1995 - -
+ A2 1996 - -
IEC 60721-3-3 1994 Classification of environmental conditions - - -
Part 3: Classification of groups of
environmental parameters and their
severities - Section 3: Stationary use at
weatherprotected locations
+ A1 1995 - -
+ A2 1996 - -
IEC 60721-3-4 1995 Classification of environmental conditions – - -
Part 3: Classification of groups of
environmental parameters and their
severities – Section 4: Stationary use at non-
weatherprotected locations
+ A1 1996 - -
IEC 60730-1 2013 Automatic electrical controls – Part 1: EN 60730-1 2016
(mod) General requirements
+ A1 2015 + A1 2019
+ A2 2020 + A2 2022
IEC 60738-1-1 2008 Thermistors – Directly heated positive step- EN 60738-1-1 2008
function temperature coefficient – Part 1-1:
Blank detail specification – Current limiting
application – Assessment leve EZ
IEC 60755 2017 General safety requirements for residual - -
current operated protective devices
IEC 60799 2018 Electrical accessories – Cord sets and EN IEC 60799 2021
interconnection cord sets
Publication Year Title EN/HD Year
IEC 60947-7 series Low-voltage switchgear and controlgear EN 60947-7 series
IEC 60949 1988 Calculation of thermally permissible short- - -
circuit currents, taking into account non-
adiabatic heating effects
+ A1 2008 - -
IEC 60990 2016 Methods of measurement of touch current EN 60990 2016
and protective conductor current
IEC 61032 1997 Protection of persons and equipment by EN 61032 1998
enclosures - Probes for verification
IEC 61180 2016 High-voltage test techniques for low-voltage EN 61180 2016
equipment - Definitions, test and procedure
requirements, test equipment
IEC 61189-3 2007 Test methods for electrical materials, printed EN 61189-3 2008
boards and other interconnection structures
and assemblies - Part 3: Test methods for
interconnection structures (printed boards)
IEC 61204-7 2016 Low-voltage switch mode power supplies - EN IEC 61204-7 2018
Part 7: Safety requirements
IEC 61558-1 2017 Safety of transformers, reactors, power EN IEC 61558-1 2019
supply units and combinations thereof - Part
1: General requirements and tests
IEC 62109-1 2010 Safety of power converters for use in - -
photovoltaic power systems - Part 1: General
requirements
ISO/IEC Guide 2014 Safety aspects - Guidelines for their inclusion - -
51 in standards
IEC Guide 104 2019 The preparation of safety publications and - -
the use of basic safety publications and
group safety publications
IEC Guide 116 2018 Guidelines for safety related risk assessment - -
and risk reduction for low voltage equipment
ISO 3746 2010 Acoustics - Determination of sound power EN ISO 3746 2010
levels and sound energy levels of noise
sources using sound pressure - Survey
method using an enveloping measurement
surface over a reflecting plane
ISO 3864 series Safety colours and safety signs - -
ISO 3864-1 2011 Graphical symbols - Safety colours and - -
safety signs - Part 1: Design principles for
safety signs and safety markings
ISO 7000 - Graphical symbols for use on equipment_- - -
Registered symbols
ISO 7010 - Graphical symbols - Safety colours and - -
safety signs - Registered safety signs
ISO 9614-1 1993 Acoustics - Determination of sound power EN ISO 9614-1 2009
levels of noise sources using sound intensity
- Part 1: Measurement at discrete points

IEC 62477-1 ®
Edition 2.0 2022-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ

Safety requirements for power electronic converter systems and equipment –

Part 1: General
Exigences de sécurité applicables aux systèmes et matériels électroniques de

conversion de puissance –
Partie 1: Généralités
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.200 ISBN 978-2-8322-2199-0

– 2 – IEC 62477-1:2022 © IEC 2022
CONTENTS
FOREWORD . 11
INTRODUCTION . 14
1 Scope . 16
2 Normative references . 17
3 Terms and definitions . 20
4 Protection against hazards . 33
4.1 General . 33
4.2 Single fault conditions and abnormal operating conditions . 33
4.3 Short-circuit and overload protection . 34
4.3.1 General . 34
4.3.2 Input short-circuit withstand strength and output short-circuit current

ability . 36
4.3.3 Short-circuit coordination (backup protection) . 37
4.3.4 Protection by several devices . 37
4.4 Protection against electric shock . 37
4.4.1 General . 37
4.4.2 Decisive voltage class . 40
4.4.3 Means for basic protection (protection against direct contact) . 44
4.4.4 Means for fault protection (protection against indirect contact) . 45
4.4.5 Means for enhanced protection . 55
4.4.6 Protective means for equipment classes . 56
4.4.7 Insulation . 58
4.4.8 Compatibility with residual current-operated protective devices (RCD) . 75
4.4.9 Capacitor discharge . 76
4.5 Protection against electrical energy hazards . 76
4.5.1 General access areas . 76
4.5.2 Service access areas . 77
4.6 Protection against fire and thermal hazards . 77
4.6.1 Circuits representing a fire hazard . 77
4.6.2 Components representing a fire hazard . 77
4.6.3 Fire enclosures . 79
4.6.4 Temperature limits . 83
4.6.5 Limited power sources . 86
4.7 Protection against mechanical hazards . 87
4.7.1 General . 87
4.7.2 Specific requirements for liquid cooled PECS . 88
4.7.3 Mechanical hazards from rotating parts . 89
4.7.4 Sharp edges . 90
4.8 PECS with multiple sources of supply . 90
4.9 Protection against environmental stresses . 91
4.10 Protection against excessive acoustic noise hazards . 92
4.11 Wiring and connections . 93
4.11.1 General . 93
4.11.2 Insulation of conductors . 93
4.11.3 Stranded wire . 95
4.11.4 Routing and clamping . 95
4.11.5 Identification of conductors and terminals . 95

IEC 62477-1:2022 © IEC 2022 – 3 –
4.11.6 Splices and connections . 96
4.11.7 Accessible connections . 96
4.11.8 Interconnections between parts of the PECS . 97
4.11.9 Supply connections. 97
4.11.10 Field wiring terminals and internal terminals . 99
4.11.11 Means for shield connection of shielded wire or shielded cable . 101
4.12 Enclosures . 101
4.12.1 General . 101
4.12.2 Handles and manual controls . 102
4.12.3 Cast metal . 102
4.12.4 Sheet metal . 103
4.12.5 Stability requirement for enclosure. 105
4.12.6 Strain relief . 106
4.12.7 Polymeric enclosure stress relief . 106
4.12.8 Polymeric enclosure UV resistance . 106
4.13 Components . 106
4.13.1 General . 106
4.13.2 PTC thermistors . 107
4.13.3 Mains supply cords . 107
4.13.4 Capacitors and RC units bridging insulation . 107
4.13.5 Wound components . 107
4.13.6 Plug and socket-outlets . 108
4.14 Protection against electromagnetic fields . 108
5 Test requirements . 108
5.1 General . 108
5.1.1 Test objectives and classification . 108
5.1.2 Selection of test samples . 108
5.1.3 Sequence of tests . 108
5.1.4 Earthing conditions . 109
5.1.5 General conditions for tests . 109
5.1.6 Compliance . 110
5.1.7 Test overview . 110
5.2 Test specifications . 112
5.2.1 Visual inspection (type test and routine test) . 112
5.2.2 Mechanical tests . 112
5.2.3 Electrical tests . 121
5.2.4 Abnormal operation and simulated faults tests . 141
5.2.5 Material tests . 148
5.2.6 Environmental tests (type tests) . 153
5.2.7 Hydrostatic pressure test (type test, routine test) . 157
5.2.8 Electromagnetic fields (EMF) . 158
6 Information and marking requirements . 158
6.1 General . 158
6.2 Information for selection . 160
6.2.1 General . 160
6.2.2 Instructions and markings pertaining to accessories . 162
6.3 Information for installation and commissioning . 162
6.3.1 General . 162
6.3.2 Mechanical considerations . 162

– 4 – IEC 62477-1:2022 © IEC 2022
6.3.3 Environment . 162
6.3.4 Handling and mounting . 162
6.3.5 Enclosure temperature. 163
6.3.6 Open type PECS . 163
6.3.7 Connections . 163
6.3.8 Commissioning . 165
6.3.9 Protection requirements . 165
6.4 Information for intended use . 167
6.4.1 General . 167
6.4.2 Adjustment . 167
6.4.3 Labels, signs, symbols and signals . 168
6.4.4 Hot surfaces . 170
6.4.5 Control and device marking . 170
6.5 Supplementary information . 170
6.5.1 Maintenance . 170
6.5.2 Capacitor discharge . 171
6.5.3 Auto restart/bypass connection . 171
6.5.4 Other hazards . 171
6.5.5 PECS with multiple sources of supply . 171
6.5.6 Replaceable fuses in neutral of single-phase PECS . 171
Annex A (normative) Additional information for protection against electric shock . 173
A.1 General . 173
A.2 Protection by means of DVC As . 173
A.3 Protection by means of protective impedance . 173
A.4 Protection by using limited voltages . 174
A.5 Evaluation of the working voltage of circuits . 175
A.5.1 General . 175
A.5.2 Classification of the working voltage . 175
A.5.3 AC working voltage . 176
A.5.4 DC working voltage. 176
A.5.5 Pulsating working voltage . 177
A.6 The concept of protective means according to 4.4 . 178
A.6.1 General . 178
A.6.2 Examples of the use of elements of protective means . 178
Annex B (informative) Considerations for the reduction of the pollution degree . 180
B.1 General . 180
B.2 Factors influencing the pollution degree . 180
B.3 Reduction of influencing factors . 180
Annex C (informative) Symbols referred to in this document . 181
C.1 Symbols used . 181
C.2 Determination of contrast . 182
Annex D (normative) Evaluation of clearance and creepage distances . 184
D.1 Measurement . 184
D.2 Relationship of measurement to pollution degree . 184
D.3 Examples . 185
Annex E (normative) Altitude correction for clearances . 191
E.1 Correction factor for clearances at altitudes above 2 000 m . 191
E.2 Test voltages for verifying clearances at different altitudes . 191

IEC 62477-1:2022 © IEC 2022 – 5 –
Annex F (normative) Clearance and creepage distance determination for frequencies
greater than 30 kHz . 193
F.1 General influence of the frequency on the withstand characteristics . 193
F.2 Clearance . 193
F.2.1 General . 193
F.2.2 Clearance for inhomogenous fields . 194
F.2.3 Clearance for approximately homogenous fields . 195
F.3 Creepage distance . 196
F.4 Solid insulation . 197
F.4.1 General . 197
F.4.2 Approximately uniform field distribution without air gaps or voids . 197
F.4.3 Other cases . 198
Annex G (informative) Cross-sections of round conductors . 199
Annex H (informative) Guidelines for RCD compatibility . 200
H.1 Selection of RCD type . 200
H.2 Fault current waveforms . 201
Annex I (informative) Examples of overvoltage category reduction . 204
I.1 General . 204
I.2 Protection to the surroundings (see 4.4.7.2) . 204
I.2.1 Circuits connected to mains supply (see 4.4.7.2.3) . 204
I.2.2 Circuits connected to the non-mains supply (see 4.4.7.2.4) . 207
I.2.3 Protection between circuits (see 4.4.7.2.7) . 207
I.3 Functional insulation (see 4.4.7.3) . 208
I.4 Further examples . 208
I.5 Circuits with multiple supplies (see 4.4.7.2.1) . 209
Annex J (informative) Burn thresholds for touchable surfaces . 210
J.1 General . 210
J.2 Burn thresholds. 210
Annex K (informative) Table of electrochemical potentials . 214
Annex L (informative) Measuring instrument for touch current measurements . 215
L.1 Measuring instrument 1 . 215
L.2 Measuring instrument 2 . 215
L.3 Measuring instrument 3 . 216
Annex M (normative) Test probes for determining access . 217
Annex N (informative) Guidance regarding short-circuit current. 220
N.1 General . 220
N.2 Coordination of short-circuit current . 221
N.2.1 General . 221
N.2.2 Conditional short-circuit current (I ) and minimum required prospective
cc
short-circuit current (I ) . 221
cp, mr
N.2.3 Short-time withstand current (I ) . 223
cw
N.3 Guidance for specification of short-circuit current and short-circuit protective
device . 224
N.3.1 General . 224
N.3.2 Example 1: Two or more PECS with different ratings . 225
N.3.3 Specification of I . 226
cc
N.3.4 Specification of I . 226
cw
– 6 – IEC 62477-1:2022 © IEC 2022
N.3.5 Example 2: One PECS with more than one rating . 227
N.3.6 Additional explanation on terms, definitions and specifications . 228
N.4 Short-circuit rating and single fault conditions testing . 229
N.4.1 General . 229
N.4.2 Exemption from short-time withstand current testing . 231
N.5 Guideline for short-circuit analysis . 231
Annex O (informative) Guidelines for determination of clearance and creepage
distances . 232
O.1 Guideline for determination of clearances . 232
O.2 Guideline for determination of creepage distances . 233
O.3 Minimum spacings within solid insulation or similar . 233
Annex P (informative) Protection of persons against electromagnetic fields for
frequencies from 0 Hz up to 300 GHz . 235
P.1 General influence of electromagnetic fields to persons . 235
P.1.1 General . 235
P.1.2 Low-frequency electric fields effects (1 Hz to 100 kHz) . 235
P.1.3 Low-frequency magnetic fields effects (1 Hz to 100 kHz) . 235
P.1.4 Low-frequency electric and magnetic fields effects . 235
P.1.5 High-frequency electromagnetic fields effects (100 kHz to 300 GHz) . 235
P.1.6 Current knowledge on low-level effects . 236
P.1.7 Biological effects versus adverse health effects . 236
P.1.8 Influence of EMF on passive and active medical implants . 236
P.2 Requirements from ICNIRP LF guidelines against exposure to EMF . 236
P.2.1 Adoption of exposure limits from ICNIRP . 236
P.2.2 Limits of EMF exposure for transportation and storage . 238
P.3 Protection of persons against exposure of EMF . 238
P.3.1 General . 238
P.3.2 EMF requirements for general public access areas . 239
P.3.3 EMF requirements for general access areas, service access areas and
restricted access areas . 239
P.3.4 EMF requirements for transportation and storage . 239
P.4 Electromagnetic fields (EMF) test (type test) . 240
P.4.1 General test set up for EMF . 240
P.4.2 EMF test (type test) . 240
P.5 Electromagnetic f
...