EN IEC 61643-01:2025
(Main)Low-voltage surge protective devices - Part 01: General Requirements and test methods
Low-voltage surge protective devices - Part 01: General Requirements and test methods
IEC 61643-01: 2024 contains the common requirements for all SPDs. This document is applicable to devices for surge protection against indirect and direct effects of lightning or other transient overvoltages, hereafter referred to as Surge Protective Devices (SPDs). SPDs are intended to be connected to circuits or equipment rated up to 1 000 V AC (RMS) or 1 500 V DC. Performance and safety requirements, tests and ratings are specified in this document. SPDs contain at least one nonlinear component and are intended to limit surge voltages and divert surge currents. This document, together with IEC 61643-11:— (second edition), cancels and replaces the first edition of IEC 61643-11 published in 2011. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the first edition of IEC 61643-11: a) Clarification on test application either to a complete SPD, to a "mode of protection", or to a complete "SPD assembly"; b) Additional measurement of voltage protection level on "combined modes of protection" between live conductors and PE (see new Annex F); c) Additional duty test for T1 SPD and T2 SPD with follow current to check for increased follow current at lower impulse current amplitude (see 9.3.5.5); d) Modified and amended short circuit current test requirements to better cover up-to-date internal SPD disconnector technologies (see 9.3.6.3); e) Improved dielectric test requirements for the SPD’s main circuits and added dielectric test requirements for "electrically separated circuits" (see 9.3.7 and 9.3.8); f) Additional clearance requirements for "electrically separated circuits" (see 9.4.4); g) Additional information and details for SPDs for DC installations.
Überspannungsschutzgeräte für Niederspannung - Teil 1: Allgemeine Anforderungen und Prüfverfahren
Parafoudres basse tension - Partie 01: Exigences générales et méthodes d’essai
L'IEC 61643-01:2024 contient les exigences communes à tous les SPD. Le présent document est applicable aux dispositifs de protection contre les effets indirects et directs de la foudre ou contre les surtensions transitoires, ci-après dénommés parafoudres (SPD). Les parafoudres sont destinés à être connectés à des circuits ou à des équipements de tension assignée allant jusqu’à 1 000 V efficaces en courant alternatif ou 1 500 V en courant continu. Les exigences de performance et de sécurité, les essais et les valeurs assignées sont spécifiés dans le présent document. Les parafoudres comportent au moins un composant non linéaire et sont utilisés pour limiter les surtensions et écouler les courants de foudre. Le présent document, conjointement avec l’IEC 61643-11:— (deuxième édition), annule et remplace la première édition de l’IEC 61643-11 parue en 2011. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures importantes suivantes par rapport à la première édition de l’IEC 61643-11: a) clarification de l’application des essais soit à un parafoudre complet, soit à un "mode de protection", soit à un "jeu de parafoudre" complet; b) ajout d’une mesure du niveau de protection en tension sur les "modes de protection combinés" entre les conducteurs actifs et le PE (voir la nouvelle Annexe F); c) ajout d’un essai de fonctionnement pour les parafoudres T1 et T2 avec courant de suite pour vérifier l’augmentation du courant de suite à une amplitude de courant de choc plus faible (voir 9.3.5.5); d) modification des exigences relatives à l’essai de comportement vis-à-vis des courants de court-circuit, afin de mieux couvrir les technologies modernes de déconnecteurs internes de parafoudre (voir 9.3.6.3); e) amélioration des exigences relatives à l’essai diélectrique pour les circuits principaux d’un parafoudre et ajout d’exigences relatives à l’essai diélectrique pour les "circuits électriquement séparés" (voir 9.3.7 et 9.3.8); f) ajout d’exigences en matière de distance d’isolement pour les "circuits électriquement séparés" (voir 9.4.4); g) ajout d’informations et de détails concernant les parafoudres pour les installations à courant continu.
Nizkonapetostne naprave za zaščito pred prenapetostnimi udari - 1. del: Splošne zahteve in preskusne metode (IEC 61643-01:2024)
Ta del standarda IEC 61643 vsebuje splošne zahteve za naprave za zaščito pred prenapetostnimi udari (SPD).
Ta dokument se uporablja za naprave za zaščito pred prenapetostnimi udari v primeru posrednih in neposrednih učinkov strele ali drugih prehodnih prenapetosti, v nadaljevanju imenovane naprave za zaščito pred prenapetostnimi udari.
Naprave za zaščito pred prenapetostnimi udari so namenjene za priključitev na tokokroge ali opremo z nazivno napetostjo do 1000 V AC (RMS) ali 1500 V DC. Ta dokument določa zahteve glede delovanja in varnosti, preskuse ter nazivne vrednosti. Naprave za zaščito pred prenapetostnimi udari vsebujejo vsaj eno nelinearno komponento ter so namenjene omejitvi sunkov napetosti in preusmeritvi toka.
General Information
- Status
- Published
- Publication Date
- 10-Apr-2025
- Technical Committee
- CLC/TC 37A - Low voltage surge protective devices
- Drafting Committee
- IEC/SC 37A - IEC_SC_37A
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 22-Dec-2025
- Completion Date
- 30-Dec-2025
Relations
- Effective Date
- 11-Mar-2025
- Effective Date
- 08-Aug-2023
Overview
EN IEC 61643-01:2025 (aligned with IEC 61643-01:2024) specifies the general requirements and test methods for low-voltage Surge Protective Devices (SPDs). It applies to SPDs intended to protect circuits and equipment from indirect and direct effects of lightning and other transient overvoltages, for systems rated up to 1 000 V AC (RMS) or 1 500 V DC. The standard defines performance, safety, testing and rating principles for SPDs that contain at least one nonlinear component and are designed to limit surge voltages and divert surge currents.
Key topics and requirements
- Scope and classification: definitions, SPD types, number of ports, modes of protection (voltage switching, voltage limiting, combination), environment (indoor/outdoor), mounting and accessibility.
- Electrical performance: continuous current, measured limiting voltage, protective conductor current, operating duty and behaviour under temporary overvoltages.
- Safety and end-of-life: open-circuit (OCM) and short-circuit (SCM) end-of-life modes, internal/external disconnector locations, and safety performance for overstressed SPDs.
- Mechanical and environmental requirements: enclosures (IP code), air clearances and creepage distances, heat/fire resistance, tracking resistance and EMC considerations.
- Tests and test methods: routine and acceptance tests, dielectric withstand, short-circuit current tests, and specific duty tests for T1/T2 SPDs.
- Marking and documentation: product information, status indicators and manufacturer-declared parameters.
- Significant technical updates (from previous edition): clarification of test application scope; measurement of protection level for combined modes to PE (Annex F); additional follow-current duty tests for T1/T2; revised short-circuit test rules for modern disconnector technologies; enhanced dielectric testing and clearance rules for electrically separated circuits; extra guidance for DC installations.
Applications and users
- Who uses it: SPD manufacturers, test laboratories, electrical designers, installers, building services engineers, substation and power distribution professionals, and safety/regulatory bodies.
- Practical uses:
- Designing and certifying SPDs for residential, commercial, industrial and DC installations.
- Performing type and routine tests to demonstrate compliance with performance and safety criteria.
- Specifying SPD selection and installation requirements for power distribution panels, substations, telecommunications and renewable-energy systems.
- Integrating SPDs into product documentation, marking, and performance declarations for compliance and procurement.
Related standards
- IEC/EN series referenced in the standard (for example IEC 61643-11 family documents and IEC 60364 series) - consult the bibliography in EN IEC 61643-01:2025 for harmonized and complementary standards applicable to SPD testing, installation and coordination.
Keywords: EN IEC 61643-01:2025, low-voltage surge protective devices, SPDs, surge protection, test methods, transient overvoltages, lightning protection.
Frequently Asked Questions
EN IEC 61643-01:2025 is a standard published by CLC. Its full title is "Low-voltage surge protective devices - Part 01: General Requirements and test methods". This standard covers: IEC 61643-01: 2024 contains the common requirements for all SPDs. This document is applicable to devices for surge protection against indirect and direct effects of lightning or other transient overvoltages, hereafter referred to as Surge Protective Devices (SPDs). SPDs are intended to be connected to circuits or equipment rated up to 1 000 V AC (RMS) or 1 500 V DC. Performance and safety requirements, tests and ratings are specified in this document. SPDs contain at least one nonlinear component and are intended to limit surge voltages and divert surge currents. This document, together with IEC 61643-11:— (second edition), cancels and replaces the first edition of IEC 61643-11 published in 2011. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the first edition of IEC 61643-11: a) Clarification on test application either to a complete SPD, to a "mode of protection", or to a complete "SPD assembly"; b) Additional measurement of voltage protection level on "combined modes of protection" between live conductors and PE (see new Annex F); c) Additional duty test for T1 SPD and T2 SPD with follow current to check for increased follow current at lower impulse current amplitude (see 9.3.5.5); d) Modified and amended short circuit current test requirements to better cover up-to-date internal SPD disconnector technologies (see 9.3.6.3); e) Improved dielectric test requirements for the SPD’s main circuits and added dielectric test requirements for "electrically separated circuits" (see 9.3.7 and 9.3.8); f) Additional clearance requirements for "electrically separated circuits" (see 9.4.4); g) Additional information and details for SPDs for DC installations.
IEC 61643-01: 2024 contains the common requirements for all SPDs. This document is applicable to devices for surge protection against indirect and direct effects of lightning or other transient overvoltages, hereafter referred to as Surge Protective Devices (SPDs). SPDs are intended to be connected to circuits or equipment rated up to 1 000 V AC (RMS) or 1 500 V DC. Performance and safety requirements, tests and ratings are specified in this document. SPDs contain at least one nonlinear component and are intended to limit surge voltages and divert surge currents. This document, together with IEC 61643-11:— (second edition), cancels and replaces the first edition of IEC 61643-11 published in 2011. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the first edition of IEC 61643-11: a) Clarification on test application either to a complete SPD, to a "mode of protection", or to a complete "SPD assembly"; b) Additional measurement of voltage protection level on "combined modes of protection" between live conductors and PE (see new Annex F); c) Additional duty test for T1 SPD and T2 SPD with follow current to check for increased follow current at lower impulse current amplitude (see 9.3.5.5); d) Modified and amended short circuit current test requirements to better cover up-to-date internal SPD disconnector technologies (see 9.3.6.3); e) Improved dielectric test requirements for the SPD’s main circuits and added dielectric test requirements for "electrically separated circuits" (see 9.3.7 and 9.3.8); f) Additional clearance requirements for "electrically separated circuits" (see 9.4.4); g) Additional information and details for SPDs for DC installations.
EN IEC 61643-01:2025 is classified under the following ICS (International Classification for Standards) categories: 29.240.10 - Substations. Surge arresters. The ICS classification helps identify the subject area and facilitates finding related standards.
EN IEC 61643-01:2025 has the following relationships with other standards: It is inter standard links to EN 61643-11:2012/A11:2018, EN IEC 61643-01:2025/A11:2025. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN IEC 61643-01:2025 is associated with the following European legislation: EU Directives/Regulations: 2014/35/EU; Standardization Mandates: M/511. 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.
You can purchase EN IEC 61643-01:2025 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CLC standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2025
Nadomešča:
SIST EN 61643-11:2012
SIST EN 61643-11:2012/A11:2018
Nizkonapetostne naprave za zaščito pred prenapetostnimi udari - 1. del: Splošne
zahteve in preskusne metode (IEC 61643-01:2024)
Low-voltage surge protective devices - Part 01: General Requirements and test methods
(IEC 61643-01:2024)
Überspannungsschutzgeräte für Niederspannung – Teil 1: Allgemeine Anforderungen
und Prüfverfahren (IEC 61643-01:2024)
Parafoudres basse tension - Partie 01: Exigences générales et méthodes d’essai (IEC
61643-01:2024)
Ta slovenski standard je istoveten z: EN IEC 61643-01:2025
ICS:
29.120.50 Varovalke in druga Fuses and other overcurrent
nadtokovna zaščita protection devices
29.240.10 Transformatorske postaje. Substations. Surge arresters
Prenapetostni odvodniki
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 61643-01
NORME EUROPÉENNE
EUROPÄISCHE NORM April 2025
ICS 29.240.10 Supersedes EN 61643-11:2012 (partially)
English Version
Low-voltage surge protective devices - Part 01: General
Requirements and test methods
(IEC 61643-01:2024)
Parafoudres basse tension - Partie 01: Exigences Überspannungsschutzgeräte für Niederspannung - Teil 1:
générales et méthodes d'essai Allgemeine Anforderungen und Prüfverfahren
(IEC 61643-01:2024) (IEC 61643-01:2024)
This European Standard was approved by CENELEC on 2025-01-24. 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
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61643-01:2025 E
European foreword
The text of document 37A/419/FDIS, future edition 1 of IEC 61643-01, prepared by SC 37A "Low-
voltage surge protective devices" of IEC/TC 37 "Surge arresters" was submitted to the IEC-CENELEC
parallel vote and approved by CENELEC as EN IEC 61643-01:2025.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2026-04-30
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2028-04-30
document have to be withdrawn
This document partially supersedes EN 61643-11:2012 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.
This document has been prepared under a standardization request addressed to CENELEC by the
European Commission. The Standing Committee of the EFTA States subsequently approves these
requests for its Member States.
For the relationship with EU Legislation, see informative Annex ZZ, which is an integral part of
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 61643-01:2024 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 60038 NOTE Approved as EN 60038
IEC 60060-2:2010 NOTE Approved as EN 60060-2:2011 (not modified)
IEC 60060-3:2006 NOTE Approved as EN 60060-3:2006 (not modified)
IEC 60269-1:2006 NOTE Approved as EN 60269-1:2007 (not modified)
IEC 60269-1:2006/A1:2009 NOTE Approved as EN 60269-1:2007/A1:2009 (not modified)
IEC 60269-1:2006/A2:2014 NOTE Approved as EN 60269-1:2007/A2:2014 (not modified)
IEC 60269-2:2013 NOTE Approved as HD 60269-2:2013
IEC 60269-2:2013/A1:2016 NOTE Approved as HD 60269-2:2013/A1:2022 (not modified)
IEC 60320 series NOTE Approved as EN 60320 series
IEC 60364 series NOTE Approved as HD 60364 series
IEC 60364-4-44:2007 NOTE Approved as HD 60364-4-442:2012
IEC 60364-5-51 NOTE Approved as HD 60364-5-51
IEC 60603 series NOTE Approved as EN 60603 series
IEC 60947-1 NOTE Approved as EN IEC 60947-1
IEC 60947-5-1 NOTE Approved as EN 60947-5-1
IEC 61008-1 NOTE Approved as EN 61008-1
IEC 61083-2:2013 NOTE Approved as EN 61083-2:2013 (not modified)
IEC 61083-3:2020 NOTE Approved as EN IEC 61083-3:2021 (not modified)
IEC 61140:2016 NOTE Approved as EN 61140:2016 (not modified)
IEC 61643-12 NOTE Approved as CLC/TS 61643-12
IEC 61643-21 NOTE Approved as EN 61643-21
IEC 61643-311:2013 NOTE Approved as EN 61643-311:2013 (not modified)
IEC 61643-312:2013 NOTE Approved as EN 61643-312:2013 (not modified)
IEC 61643-321:2001 NOTE Approved as EN 61643-321:2002 (not modified)
IEC 61643-331:2020 NOTE Approved as EN IEC 61643-331:2020 (not modified)
IEC 61643-341:2020 NOTE Approved as EN IEC 61643-341:2020 (not modified)
IEC 61643-351:2016 NOTE Approved as EN 61643-351:2017 (not modified)
IEC 61643-352:2018 NOTE Approved as EN IEC 61643-352:2018 (not modified)
IEC 62305 series NOTE Approved as EN IEC 62305 series
IEC 62475:2010 NOTE Approved as EN 62475:2010 (not modified)
ISO 2039-2:1987 NOTE Approved as EN ISO 2039-2:1999 (not modified)
ISO 4892-2:2013 NOTE Approved as EN ISO 4892-2:2013 (not modified)
IEC 61643-01 ®
Edition 1.0 2024-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Low-voltage surge protective devices –
Part 01: General Requirements and test methods
Parafoudres basse tension –
Partie 01: Exigences générales et méthodes d’essai
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.240.10 ISBN 978-2-8322-4974-1
– 2 – IEC 61643-01:2024 IEC 2024
CONTENTS
FOREWORD . 7
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 10
3 Terms, definitions, abbreviated terms and symbols . 11
3.1 Terms and definitions . 11
3.2 Abbreviated terms and symbols . 22
4 Classification . 23
4.1 General . 23
4.2 Number of ports . 23
4.2.1 One . 23
4.2.2 Two . 23
4.3 SPD design . 23
4.3.1 Voltage switching. 23
4.3.2 Voltage limiting . 23
4.3.3 Combination . 23
4.4 Mode of protection design . 23
4.4.1 Voltage switching. 23
4.4.2 Voltage limiting . 23
4.4.3 Combination . 23
4.5 Type of SPD . 24
4.6 Environment . 24
4.6.1 Indoor . 24
4.6.2 Outdoor . 24
4.6.3 Non submersible SPDs . 24
4.6.4 Submersible SPDs . 24
4.7 Accessibility . 24
4.7.1 Accessible . 24
4.7.2 Inaccessible . 24
4.8 Mounting method . 24
4.8.1 Fixed . 24
4.8.2 Portable . 24
4.9 Location of disconnector (including overcurrent protection) . 25
4.9.1 Internal . 25
4.9.2 External . 25
4.9.3 Both (internal and external) . 25
4.9.4 None . 25
4.10 Degree of protection provided by enclosures according to IEC 60529 (IP
code) . 25
4.11 Temperature and humidity range . 25
4.11.1 Normal. 25
4.11.2 Extended . 25
4.12 SPD modes of protection . 25
4.12.1 SPD providing a single mode of protection . 25
4.12.2 Multimode SPD . 25
4.13 End-of-life mode of the SPDA . 25
4.13.1 Open-circuit mode (OCM) . 25
IEC 61643-01:2024 IEC 2024 – 3 –
4.13.2 Short-circuit mode (SCM) . 25
4.14 Short-Circuit protection function for OCM end-of-life mode . 25
4.14.1 Internal . 25
4.14.2 External . 26
5 Void . 26
6 Marking and other product information . 26
6.1 General . 26
6.2 List of items . 26
6.3 Information about status indicator . 28
7 Service conditions . 28
7.1 Voltage . 28
7.2 Air pressure and altitude . 29
7.3 Temperatures . 29
7.4 Humidity . 29
8 Requirements . 29
8.1 General requirements . 29
8.2 Marking . 29
8.3 Electrical requirements . 30
8.3.1 Protection against electric shock . 30
8.3.2 Continuous current I . 30
C
8.3.3 Protective conductor current I . 30
PE
8.3.4 Measured limiting voltage . 31
8.3.5 Operating duty . 31
8.3.6 Safety performance of overstressed SPDs . 31
8.3.7 Insulation resistance . 32
8.3.8 Dielectric withstand . 33
8.3.9 Behaviour under temporary overvoltages . 33
8.4 Mechanical requirements . 33
8.4.1 General . 33
8.4.2 Screws, current carrying parts and connections . 33
8.4.3 External connections . 33
8.4.4 Air clearances and creepage distances . 35
8.4.5 Mechanical strength. 35
8.5 Environmental and material requirements . 35
8.5.1 Protection provided by enclosure (IP code) . 35
8.5.2 Heat resistance . 35
8.5.3 Resistance to abnormal heat and fire . 35
8.5.4 Tracking resistance . 36
8.5.5 Ageing behaviour under damp heat . 36
8.5.6 Electromagnetic compatibility . 36
8.6 Additional requirements for specific SPD designs . 36
8.6.1 Two port SPDs and one port SPDs with separate input/output
connections . 36
8.6.2 Environmental stress for outdoor SPDs . 37
8.6.3 SPDs with electrically separated circuits . 37
8.6.4 Total Discharge Current I , if declared by the manufacturer . 37
Total
8.6.5 Two port SPDs . 37
8.6.6 Short-circuiting SPDs . 38
– 4 – IEC 61643-01:2024 IEC 2024
8.7 Routine and acceptance tests . 38
9 Tests . 38
9.1 Type testing procedures . 38
9.1.1 General . 38
9.1.2 Impulse discharge current . 43
9.1.3 8/20 current impulse . 44
9.1.4 1,2/50 voltage impulse . 45
9.1.5 Combination wave . 45
9.2 Indelibility of markings . 47
9.3 Electrical tests . 48
9.3.1 Protection against direct contact . 48
9.3.2 Continuous current I . 48
C
9.3.3 Protective conductor current I . 49
PE
9.3.4 Measured limiting voltage . 49
9.3.5 Operating duty test . 52
9.3.6 Safety performance of overstressed SPDs . 58
9.3.7 Insulation resistance . 65
9.3.8 Dielectric withstand . 66
9.3.9 Behaviour under temporary overvoltages (TOVs) . 73
9.4 Mechanical tests . 73
9.4.1 General . 73
9.4.2 Reliability of screws, current-carrying parts and connections . 73
9.4.3 Tests for external connections for copper conductors . 75
9.4.4 Verification of air clearances and creepage distances . 78
9.4.5 Mechanical strength. 83
9.5 Environmental and material tests . 86
9.5.1 Resistance to ingress of solid objects and to harmful ingress of water . 86
9.5.2 Heat resistance . 86
9.5.3 Resistance to abnormal heat and fire . 88
9.5.4 Tracking resistance . 89
9.5.5 Life test under damp heat . 89
9.6 Additional tests for specific SPD designs . 89
9.6.1 Tests for two-port SPDs and one-port SPDs with separate input/output
connections . 89
9.6.2 Environmental tests for outdoor SPDs . 95
9.6.3 SPDs with separated circuits . 96
9.6.4 Total discharge current test for multimode SPDs . 96
9.6.5 Tests for two port SPDs only . 96
Annex A (normative) Routine and acceptance tests . 99
A.1 Routine tests. 99
A.2 Acceptance tests . 99
Annex B (normative) Tests to determine on SPD modes of protection with or without
follow current . 100
B.1 SPDs modes of protection and follow current . 100
B.2 Follow current determination for SPD’s combination mode of protection
according to 4.4.3.1 . 100
Annex C (normative) Temperature rise limits . 101
Annex D (normative) Environmental tests for outdoor SPDs . 103
IEC 61643-01:2024 IEC 2024 – 5 –
D.1 Non submersible SPDs . 103
D.1.1 Accelerated aging test with UV radiation . 103
D.1.2 Temperature cycling test . 103
D.1.3 Verification of resistance to corrosion . 104
D.2 Submersible SPDs . 104
D.2.1 Water immersion test . 104
D.2.2 Dielectric test . 105
Annex E (normative) Short-circuiting SPDs . 106
E.1 General . 106
E.2 Transition surge current rating test . 106
E.2.1 General . 106
E.2.2 Test to reach the short-circuit mode of a short-circuiting SPD . 107
E.2.3 Impulse withstand test (in short-circuited condition) . 107
Annex F (normative) Reduced test procedure for series connection of SPD’s modes of
protection . 108
F.1 General . 108
F.2 Reduced test procedure . 108
Annex G (normative) Test procedures for SPDs according to 4.14.1.4 . 109
G.1 General . 109
G.2 Sample preparation and preconditioning for the short-circuit current
behaviour test . 109
G.2.1 Sample preparation . 109
G.2.2 Preconditioning procedure . 110
G.2.3 Pass criteria . 111
G.3 Specific overstress test . 111
G.3.1 Sample preparation . 111
G.3.2 General test procedure . 112
G.3.3 Pass criteria . 113
Bibliography . 114
Figure 1 – I/U characteristics for linear power source . 39
Figure 2 – Metallic screen test setup . 41
Figure 3 – Example of a decoupling network for single-phase power . 46
Figure 4 – Example of a decoupling network for three-phase power . 47
Figure 5 – Alternate test for the measured limiting voltage . 47
Figure 6 – Flow chart of testing to check the voltage protection level U . 50
p
Figure 7 – Flow chart for the operating duty tests according 9.3.5.3, 9.3.5.4 and 9.3.5.6 . 53
Figure 8 – Example of test set-up for operating duty test . 54
Figure 9 – Operating duty test timing diagram for T1 SPDs and T2 SPDs . 55
Figure 10 – Additional duty test timing diagram for T1 SPD . 56
Figure 11 – Flow chart for the additional test for SPDs with follow current . 57
Figure 12 – Example for test circuit for thermal protection test . 61
Figure 13 – Test apparatus for impact test . 83
Figure 14 – Striking element of the pendulum hammer . 84
Figure 15 – Ball pressure test arrangement. 87
Figure 16 – Pressure ball of loading device . 87
– 6 – IEC 61643-01:2024 IEC 2024
Figure 17 – Examples of appropriate test circuits for the rated load current test . 91
Figure 18 – Examples for appropriate test circuits of the load side short-circuit test(s) . 95
Figure 19 – Example of test set-up for load side surge operating duty test . 97
Figure E.1 – Differences in test procedure for short circuiting SPDs. 106
Figure G.1 – Sample preparation for preconditioning test . 110
Figure G.2 – Example of test setup for preconditioning . 110
Figure G.3 – Example of test setup for specific overstress test . 112
Figure G.4 – Typical timing diagram for specific overstress test . 113
Table 1 – List of abbreviated terms and symbols . 22
Table 2 – Type of SPD . 24
Table 3 – Pass criteria for type tests . 42
Table 4 – Example parameters for impulse discharge current . 44
Table 5 – Tests to be performed to determine the measured limiting voltage . 51
Table 6 – Prospective short circuit current to be applied depending on the maximum
overcurrent protection specified, for fuses of the gG type . 63
Table 7 – Dielectric impulse withstand test voltages for SPD main circuits . 67
Table 8 – Dielectric AC test voltages for SPD main circuits . 68
Table 9 – Dielectric AC test voltages for SPD main circuits . 68
Table 10 – Dielectric impulse withstand test voltages for separated circuits . 69
Table 11 – Dielectric AC test voltages for separated circuits . 70
Table 12 – Dielectric AC test voltages for separated circuits . 71
Table 13 – Dielectric AC test voltages between circuits with protective separation
(double/reinforced insulation) according to 9.3.7.2 c) and d) . 72
Table 14 – Impulse test voltages for verifying clearances at different altitudes . 73
Table 15 – Screw thread diameters and applied torques . 74
Table 16 – Cross-sections of copper conductors for screw-type or screwless terminals . 75
Table 17 – Conductor dimensions . 76
Table 18 – Pulling forces (screw terminals and bolted connections) . 76
Table 19 – Pulling forces (screwless terminals). 77
Table 20 – Air clearances for SPD main circuit(s) . 79
Table 21 – Air clearances for electrically separated circuits . 80
Table 22 – Creepage distances for SPDs . 81
Table 23 – Relationship between material groups and classifications . 82
Table 24 – Fall distances for impact requirements . 85
Table 25 – Test conductors for rated load current test . 92
Table 26 – Trip current factor k for overload behaviour . 93
Table 27 – Tolerances for proportional impulse currents . 96
Table C.1 – Temperature-rise limits . 102
Table F.1 – Reduced test procedure for the mode of protection provided by a series
connection of modes of protection according to F.1 . 108
IEC 61643-01:2024 IEC 2024 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LOW-VOLTAGE SURGE PROTECTIVE DEVICES –
Part 01: General requirements and test methods
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
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expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 61643-01 has been prepared by subcommittee SC37A Low-voltage surge protective
devices, of IEC technical committee 37: Surge arresters. It is an International Standard.
This document, together with IEC 61643-11:— (second edition), cancels and replaces the first
edition of IEC 61643-11 published in 2011. This edition constitutes a technical revision.
___________
Under preparation. Stage at the time of publication: IEC/AFDIS 61643-11:2024.
– 8 – IEC 61643-01:2024 IEC 2024
This edition includes the following significant technical changes with respect to the first edition
of IEC 61643-11:
a) Clarification on test application either to a complete SPD, to a "mode of protection", or to a
complete "SPD assembly";
b) Additional measurement of voltage protection level on "combined modes of protection"
between live conductors and PE (see new Annex F);
c) Additional duty test for T1 SPD and T2 SPD with follow current to check for increased follow
current at lower impulse current amplitude (see 9.3.5.5);
d) Modified and amended short circuit current test requirements to better cover up-to-date
internal SPD disconnector technologies (see 9.3.6.3);
e) Improved dielectric test requirements for the SPD’s main circuits and added dielectric test
requirements for "electrically separated circuits" (see 9.3.7 and 9.3.8);
f) Additional clearance requirements for "electrically separated circuits" (see 9.4.4);
g) Additional information and details for SPDs for DC installations.
The text of this International Standard is based on the following documents:
Draft Report on voting
37A/419/FDIS 37A/422/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts in the IEC 61643 series, published under the general title Low-voltage surge
protective devices, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.
IEC 61643-01:2024 IEC 2024 – 9 –
INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its
provisions is entrusted to appropriately qualified and experienced persons.
This document is a product family standard dealing with the safety and performance of Surge
Protective Devices (SPDs) and takes precedence over horizontal and generic standards
covering the same subject.
This part of IEC 61643 addresses the general safety and performance tests for SPDs.
This document recognizes the internationally accepted level of protection against hazards such
as electrical, mechanical, thermal, fire and radiation of SPDs when operated as in normal use
taking into account the manufacturer's instructions. It also covers abnormal situations that can
be expected in practice.
This document takes into account the requirements of IEC 60364 as far as possible so that
there is compatibility with the wiring rules when the SPD is connected to the supply mains.
However, national wiring rules might differ.
If the intended applications of an SPD are covered by different parts of the IEC 61643-X1 series
of standards, all relevant parts are applied.
This document is only to be applied together with the latest edition of one or more of the
subsequent parts of the IEC 61643-X1 series of standards.
SPDs containing additional features or functions not addressed in this document and the
relevant subsequent part(s) can require additional consideration and tests to ensure the main
SPD function is not adversely affected and no hazards can arise from these additional features
or functions. If appropriate standards exist to cover such functions, they are to be applied.
There are three SPD Types for SPDs intended to be installed in power systems:
T1 SPDs are subjected to impulses simulating conducted partial lightning currents.
T2 SPDs and T3 SPDs are subjected to impulses of shorter duration.
– 10 – IEC 61643-01:2024 IEC 2024
LOW-VOLTAGE SURGE PROTECTIVE DEVICES –
Part 01: General requirements and test methods
1 Scope
This part of IEC 61643 contains the common requirements for all SPDs.
This document is applicable to devices for surge protection against indirect and direct effects
of lightning or other transient overvoltages, hereafter referred to as Surge Protective Devices
(SPDs).
SPDs are intended to be connected to circuits or equipment rated up to 1 000 V AC (RMS) or
1 500 V DC. Performance and safety requirements, tests and ratings are specified in this
document. SPDs contain at least one nonlinear component and are intended to limit surge
voltages and divert surge currents.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of
...
SIST EN IEC 61643-01:2025 표준은 저전압 서지 보호 장치(SPD)에 대한 일반 요구 사항 및 시험 방법을 다루고 있습니다. 이 문서는 서지 보호 장치의 본질적 기능을 명확히 규명하며, 번개 또는 기타 일시적인 과전압의 간접적 및 직접적 영향을 대비하기 위해 설계된 장치들에 적용됩니다. SPD는 1,000 V AC(RMS) 또는 1,500 V DC까지의 회로나 장비에 연결하는 것을 목표로 하고 있습니다. 이 표준의 강점 중 하나는 성능 및 안전 요구 사항, 시험 및 등급에 대한 구체적인 규정을 포함하고 있다는 점입니다. SPD는 최소한 하나의 비선형 구성 요소를 포함하여 서지 전압을 제한하고 서지 전류를 분산하는 역할을 합니다. 또한, IEC 61643-11:-의 두 번째 판과 함께 이 문서는 2011년에 발표된 IEC 61643-11의 첫 번째 판을 대체하며, 기술적 개정 사항들이 포함되어 있습니다. 특히, 서지 보호 장치에 대한 기술적 변화는 다음과 같습니다: 1) 전체 SPD, 보호 모드 또는 SPD 조립 체계에 대한 시험 적용을 명확히 함; 2) 비탄력적 모드 간의 전압 보호 수준의 추가 측정; 3) 낮은 임펄스 전류 진폭에서 증가된 지속 전류를 확인하기 위한 T1 SPD 및 T2 SPD에 대한 추가 테스트; 4) 최신 내부 SPD 차단 기술을 더 잘 다루기 위한 단락 전류 시험 요구 사항의 수정; 5) SPD의 주요 회로에 대한 개선된 유전 검사 요구 사항 및 전기적으로 분리된 회로에 대한 추가 유전 검사 요구 사항; 6) 전기적으로 분리된 회로에 대한 추가 간격 요구 사항; 7) DC 설치용 SPD에 대한 추가 정보 및 세부 사항. 이처럼 SIST EN IEC 61643-01:2025는 서지 보호 장치의 요구 사항을 현대화하고 보다 엄격하게 규정함으로써 안전성을 크게 향상시키며, 관련 산업에서의 적용 가능성을 높이는 데 기여하고 있습니다. 이는 특히 전기 안전성과 설비 보호가 중요한 분야에서 매우 중요한 표준으로 자리잡고 있습니다.
The standard EN IEC 61643-01:2025, titled "Low-voltage surge protective devices - Part 01: General Requirements and test methods," presents a comprehensive framework for establishing the fundamental requirements and testing methodologies for Surge Protective Devices (SPDs). It effectively encompasses a wide range of guidelines applicable to devices designed to safeguard electrical equipment from the detrimental impacts of both indirect and direct effects of lightning, as well as other forms of transient overvoltages. One of the key strengths of this standard lies in its clear delineation regarding the scope of usage, outlining that it is relevant for circuits or equipment rated up to 1,000 V AC (RMS) or 1,500 V DC. This expansive scope ensures that the standard can be applied across various applications, thus enhancing its relevance in current electrical infrastructure. The technical revisions made in this edition mark significant improvements over the previous version. Notably, the clarified test applications cater to a thorough evaluation of either complete SPDs, specific "modes of protection," or complete "SPD assemblies." This encourages a more nuanced understanding of each component's performance under various conditions. Additionally, the inclusion of new testing requirements, such as the measurement of voltage protection levels on "combined modes of protection" and the additional duty test for T1 and T2 SPDs that monitors follow current at lower impulse amplitudes, underscores the standard's alignment with advanced technologies and contemporary practices. The modified short circuit current test requirements reflect an understanding of evolving SPD disconnector technologies, ensuring that devices adhere to modern safety and performance benchmarks. Improvements extending to dielectric test requirements for both main circuits and "electrically separated circuits" reveal a commitment to enhancing the safety and reliability of SPDs. The provision for additional clearance requirements for these circuits further supports the efficacy of protective measures offered by SPDs. Furthermore, the expanded guidance for SPDs intended for DC installations adds substantial value, catering to the growing demand for renewable energy systems and electric vehicles. Overall, EN IEC 61643-01:2025 is not only a crucial document that lays down essential performance and safety requirements but also serves as a pivotal resource for designers, manufacturers, and users of surge protective devices. Its robust standardization enhances the practical application of SPDs in diverse settings while ensuring optimal protection against transient overvoltages.
La norme EN IEC 61643-01:2025 établit des exigences générales et des méthodes d'essai pour les dispositifs de protection contre les surtensions à basse tension. Son champ d'application est particulièrement pertinent dans le contexte actuel, où les dispositifs de protection contre les surtensions (SPDs) sont essentiels pour protéger les équipements électriques contre les effets indirects et directs de la foudre ou d'autres surtensions transitoires. Les points forts de cette norme résident dans sa capacité à définir des exigences de performance et de sécurité claires, ainsi que des tests et des classifications pour les SPDs. En intégrant des exigences techniques mises à jour, la norme répond aux évolutions technologiques en matière de dispositifs de protection, garantissant ainsi une protection adéquate pour des circuits ou équipements jusqu'à 1 000 V AC (RMS) et 1 500 V DC. Les modifications techniques significatives apportées, telles que la clarification sur l'application des tests à un SPD complet ou à un "mode de protection", ajoutent de la valeur aux utilisateurs. L'inclusion de nouveaux tests, comme ceux concernant le niveau de protection contre les surtensions en modes combinés et les tests de courant de suivi pour les SPDs de type T1 et T2, reflète une volonté de s'adapter aux exigences pratiques du secteur. De plus, les exigences révisées concernant les tests de court-circuit et les tests diélectriques, notamment pour les circuits électriquement séparés, garantissent une meilleure sécurité et une compréhension approfondie des performances des SPDs dans différents scenarios d'application. L'ajout d'exigences et de détails supplémentaires pour les installations en courant continu renforce également la pertinence de la norme, rendant les SPDs plus fiables pour un éventail plus large d'applications. En somme, la norme EN IEC 61643-01:2025 est non seulement essentielle pour le développement de dispositifs de protection contre les surtensions, mais elle représente également une avancée notable dans la standardisation des exigences de sécurité et de performance, consolidant ainsi les fondements pour une protection efficace des installations électriques.
Die Norm EN IEC 61643-01:2025 bietet umfassende Anforderungen und Prüfmethoden für Überspannungsschutzgeräte (SPDs) im Niederspannungsbereich. Der Geltungsbereich dieser Norm erstreckt sich auf Geräte, die sowohl gegen direkte als auch indirekte Auswirkungen von Blitzeinschlägen oder anderen transienten Überspannungen schützen. Diese Geräte sind für Anschlüsse an Stromkreise oder Anlagen mit einer Nennspannung von bis zu 1.000 V AC (RMS) oder 1.500 V DC vorgesehen. Ein herausragendes Merkmal der Norm ist die detaillierte Aufschlüsselung der Leistungs- und Sicherheitsanforderungen, Tests und Bewertungen, die für SPDs festgelegt werden. Besonders bemerkenswert sind die technischen Änderungen gegenüber der ersten Ausgabe der Norm IEC 61643-11, die eine klare Richtung für die Entwicklung und Anwendung von SPDs vorgeben. Die Norm präzisiert, dass Prüfungen sowohl an vollkommenen SPDs als auch an spezifischen Schutzmodi oder vollständigen SPD-Baugruppen durchgeführt werden können, was die Flexibilität und Anwendbarkeit der Norm erhöht. Die zusätzlichen Messungen des Spannungsschutzniveaus, insbesondere in Bezug auf kombinierte Schutzmodi zwischen stromführenden Leitern und PE, sind ein bedeutender Fortschritt. Dies ermöglicht eine umfassendere Bewertung der Leistungsfähigkeit von SPDs unter realistischen Bedingungen. Zudem wird durch die Einführung von zusätzlichen Prüfungsmethoden, wie einem Duty-Test für T1- und T2-SPDs, eine genauere Analyse des Verhaltens unter verschiedenen Stromimpulsbedingungen ermöglicht. Ein weiterer entscheidender Aspekt der Norm ist die Anpassung der Kurzschlussstromprüfungen, die jetzt besser auf moderne interne SPD-Trennertechnologien abgestimmt sind. Dies stellt sicher, dass die Geräte auch unter extremen Bedingungen zuverlässig funktionieren. Die verbesserten Anforderungen an die Dielektrikprüfung der Hauptstromkreise und die Hinzufügung spezifischer Anforderungen für elektrisch getrennte Schaltungen zeigen das Engagement der Norm, die Sicherheit und Leistung von SPDs weiter zu optimieren. Die zusätzlichen Informationen hinsichtlich der Anwendung von SPDs in DC-Anlagen sind besonders relevant, da die Nutzung von Gleichstromtechnologien, insbesondere in der erneuerbaren Energieerzeugung, stetig zunimmt. Zusammenfassend bietet die EN IEC 61643-01:2025 einen klaren Rahmen für die Entwicklung und Prüfung von Überspannungsschutzgeräten, der sowohl technische als auch sicherheitstechnische Aspekte berücksichtigt. Diese Norm ist für Hersteller, Ingenieure und Anwender von SPDs von zentraler Bedeutung, um die Effizienz und Zuverlässigkeit von elektrischen Systemen zu gewährleisten.
標準EN IEC 61643-01:2025は、低電圧サージ保護装置に関する重要な基準であり、サージ保護装置（SPDs）の一般的要件と試験方法を定義しています。この文書は、雷やその他の過渡的な過電圧による直接的および間接的な影響からの保護を目的とした装置に適用され、最大1,000 V AC（RMS）または1,500 V DCに対応する回路や機器に接続されることを想定しています。 この標準の強みは、性能および安全要件を具体的に定め、試験方法や等級についても詳細に規定している点です。特に、SPDsが少なくとも1つの非線形素子を含むことを明記しており、サージ電圧の制限とサージ電流の逸脱を目的としていることが強調されています。 また、IEC 61643-11の第1版を更新したこの版では、特に以下の重要な技術変更が行われています。まず、完全なSPD、保護モード、または完全なSPDアセンブリへの試験適用に関する明確化がされており、これにより試験の一貫性が向上しています。さらに、電流保護レベルの追加測定を介した新しい付録Fが導入され、保護モード間の測定の精度が向上しています。T1 SPDおよびT2 SPDに対する追加義務テストは、低インパルス電流振幅での追従電流の増加をチェックするために改良されており、最新の内部SPD切断技術に対応するために短絡電流試験要件も修正されています。 さらに、SPDの主要回路に対する誘電体試験要件が改善され、「電気的に分離された回路」に対する新たな試験要件も追加されている点は特筆すべきです。これにより、電気的分離回路のクリアランス要件が従来よりも明確になり、安全性が向上しています。最後に、DC設置用のSPDsに関する情報や詳細が追加されており、幅広い応用に対する信頼性が高まっています。 このように、EN IEC 61643-01:2025は、低電圧サージ保護装置に求められる現代的かつ包括的な基準を提供し、関連業界における重要な文書となっています。
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