oSIST prEN IEC 61643-11:2024

Fragment 2: Low-voltage surge protective devices - Part 11: Surge protective devices connected to AC low-voltage power systems - Requirements and test methods

Überspannungsschutzgeräte für Niederspannung – Teil 11: Überspannungsschutzgeräte für den Einsatz in Niederspannungs-Wechselstromnetzen – Anforderungen und Prüfverfahren

Partie 11: Parafoudres connectés aux systèmes basse tension - Exigences et méthodes d'essai

Nizkonapetostne naprave za zaščito pred prenapetostnimi udari - 11. del: Naprave za zaščito pred prenapetostnimi udari za nizkonapetostne AC napajalne sisteme - Zahteve in preskusne metode (fragment 2)

General Information

• Status: Not Published
• Public Enquiry End Date: 25-Jan-2024
• ICS: 29.120.50 - Fuses and other overcurrent protection devices
• ICS: 29.240.10 - Substations. Surge arresters
• Technical Committee: POD - Surge aresters
• Current Stage: 98 - Abandoned project (Adopted Project)
• Start Date: 13-Jun-2025
• Due Date: 18-Jun-2025
• Completion Date: 25-Aug-2025
• Ref Project: prEN IEC 61643-11:2023 {frag 2} - Voltage surge protective devices - Part 11: Surge protective devices connected to AC low-voltage power systems - Requirements and test methods

Overview

prEN IEC 61643-11:2023 (Fragment 2) is an international draft standard developed by CLC and IEC for surge protective devices (SPDs) connected to AC low-voltage power systems. This standard specifies requirements and test methods for SPDs, focusing especially on those designed for low-voltage (LV) AC power distribution networks. It also addresses additional and modified requirements for portable SPDs classified as pluggable equipment type A, making it highly relevant for those involved in electrical safety, quality assurance, and product compliance for household and similar applications.

Key Topics

• Requirements for AC Low-Voltage SPDs: The standard defines the necessary criteria that SPDs must meet for safe and effective operation in AC power systems. These include general functional requirements, mechanical integrity, protection modes, and proper insulation distances.
• Test Methods: Detailed procedures are outlined for the evaluation of surge protective devices, including electrical, thermal, and dielectric testing. Tests cover performance under normal conditions, fault scenarios, and overvoltages.
• Portable and Pluggable SPDs: Special attention is given to pluggable equipment type A SPDs-devices intended for household and similar uses, connected via standard plugs or appliance couplers. These must comply with additional internal disconnector requirements, dedicated overstress tests, and behavior under temporary overvoltages (TOVs).
• Expanded Safety Criteria:
  • Requirements for internal disconnectors (no external devices needed)
  • Voltage limiting component ratings and proper protection modes (L-L, L-PE, etc.)
  • Modified short-circuit current test and additional overstress criteria, incorporating potential scenarios in residential networks
  • Compliance with clearance and creepage distances based on overvoltage category II and specified pollution degree
• Integration with Other Standards: The standard is to be applied in conjunction with IEC 61643-01 (common requirements) and references IEC 62368-1 for safety of audio/video and ICT equipment.

Applications

This standard is essential for:

• Manufacturers of Surge Protective Devices: Ensuring that SPDs meet harmonized European and international safety and performance benchmarks is critical for market access.
• Testing and Certification Bodies: Laboratories and agencies can use the prescribed test protocols to assess conformity of SPDs, especially portable types used in residential settings.
• Electrical Engineers and Installers: Understanding the requirements and limits imposed on household SPDs, including necessary protection for different application modes, enhances electrical safety in consumer installations.
• Product Development for Portable SPDs: Guidance on the design, internal components, and robustness of plug-in surge protectors used in homes, ensuring compliance with additional safety and reliability standards.
• Household and Small Office Systems: Selection and application of surge protectors that meet international standards is facilitated, improving safety and network continuity.

Related Standards

• IEC 61643-01: Common requirements for all surge protective devices
• IEC 60364 Series: Low-voltage electrical installations (referenced for TOV test conditions)
• IEC 62368-1: Safety requirements for audio/video, information and communication technology equipment (critical for pluggable type A SPDs)
• Other related standards in the field of overcurrent protection, substation equipment, and electrical safety

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prEN IEC 61643-11:2023 is a vital reference for all stakeholders involved in the development, testing, and application of surge protective devices for AC low-voltage systems. It ensures products align with evolving technological advances in internal disconnectors and addresses the expanded use of portable SPDs in modern, interconnected environments. Adhering to this standard not only supports product quality and compliance but also promotes greater protection of electrical systems and end users.

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2024
Nizkonapetostne naprave za zaščito pred prenapetostnimi udari - 11. del: Naprave
za zaščito pred prenapetostnimi udari za nizkonapetostne AC napajalne sisteme -
Zahteve in preskusne metode (fragment 2)
Fragment 2: Low-voltage surge protective devices - Part 11: Surge protective devices
connected to AC low-voltage power systems - Requirements and test methods
Partie 11: Parafoudres connectés aux systèmes basse tension - Exigences et méthodes
d'essai
Ta slovenski standard je istoveten z: prEN IEC 61643-11:2023 {frag 2}
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.

37A/404/CDV
COMMITTEE DRAFT FOR VOTE (CDV)

PROJECT NUMBER:
IEC 61643-11/FRAG2 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2023-11-03 2024-01-26
SUPERSEDES DOCUMENTS:
37A/368/CD, 37A/393/CC
IEC SC 37A : LOW-VOLTAGE SURGE PROTECTIVE DEVICES
SECRETARIAT: SECRETARY:
United States of America Mr Casey Granata
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

SC 37B,TC 64,TC 81,TC 82,TC 109
Other TC/SCs are requested to indicate their interest, if any,
in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft for
Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they
are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries”
clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for
submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Fragment 2: Low-voltage surge protective devices - Part 11: Surge protective devices connected to AC
low-voltage power systems - Requirements and test methods

PROPOSED STABILITY DATE: 2026
NOTE FROM TC/SC OFFICERS:
This document must be read in conjuction with 37A/401/CDV for IEC 61643-01 and with 37A/403/CDV for IEC
61643-11 fragment 1. This document contains an option for an additional Annex from CLC for Additional
requirements for portable SPDs classified as pluggable equipment type A.

electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.

IEC CDV 61643-11/F2/Ed2 © IEC 2023 – 2 – 37A/404/CDV
1 CONTENTS
3 FOREWORD . 3
4 2 Normative references . 5
5 8.6.7 Portable SPDs classified as pluggable equipment type A . 5
6 Annex E (informative/normative) Portable SPDs classified as pluggable equipment
7 type A . 6
8 E.1 General . 6
9 E.2 Additional requirements . 6
10 E.3 Modified test requirements . 7
11 E.3.1 Test at low short-circuit current. 7
12 E.3.2 Dedicated overstress test . 7
13 E.3.3 Behaviour under temporary overvoltages (TOVs) . 7
15 TABLES
16 Table E.1 - TOV test values for systems complying with IEC 60364 series for portable
17 SPDs . 8
IEC CDV 61643-11/F2/Ed2 © IEC 2023 – 3 – 37A/404/CDV
20 INTERNATIONAL ELECTROTECHNICAL COMMISSION
21 ____________
23 LOW-VOLTAGE SURGE PROTECTIVE DEVICES –
25 Part 11: Surge protective devices connected
26 to AC low-voltage power systems –
27 Requirements and test methods
31 FOREWORD
32 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
33 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
34 international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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53 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
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55 services carried out by independent certification bodies.
56 6) All users should ensure that they have the latest edition of this publication.
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61 Publications.
62 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
63 indispensable for the correct application of this publication.
64 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
65 patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
66 International Standard IEC 61643-11 has been prepared by subcommittee 37A: Low-voltage
67 surge protective devices, of IEC technical committee 37:Surge arresters.
68 This second edition cancels and replaces the first edition published in 2011-03-09, whereby
69 the common requirements for all SPDs are now contained in IEC 61643-01, and this second
70 edition only contains the specific requirements for SPDs for AC applications . This edition
71 constitutes a technical revision.
72 This edition includes the following significant technical changes with respect to the previous
73 edition:
74 a) Clarification on test application either to a complete SPD, to a “mode of protection”, or to
75 a complete “SPD assembly”
IEC CDV 61643-11/F2/Ed2 © IEC 202
...