SIST EN IEC 63522-43:2026
(Main)Electrical relays - Tests and Measurements - Part 43: Proof tracking index (PTI)
Electrical relays - Tests and Measurements - Part 43: Proof tracking index (PTI)
IEC 63522-43:2025 This document is used for testing along with the appropriate severities and conditions for measurements and tests designed to assess the ability of specimens to perform under expected conditions of transportation, storage and all aspects of operational use.
This document defines a standard test method for evaluation of appropriate materials having appropriate values of tracking resistance.
Elektrische Relais – Mess- und Prüfverfahren – Teil 43: Prüfzahl der Kriechwegbildung (PTI)
Relais électriques - Essais et mesurages - Partie 43: Indice de tenue au cheminement (ITC)
IEC 63522-43:2025 Le présent document est utilisé pour réaliser des essais avec les sévérités et les conditions appropriées aux mesurages et des essais destinés à évaluer la capacité des éprouvettes à fonctionner dans les conditions prévues de transport et de stockage, ainsi que dans tous les aspects de leur utilisation opérationnelle.
Le présent document définit une méthode d'essai normalisée pour l'évaluation de matériaux appropriés présentant des valeurs de résistance au cheminement appropriées.
Električni releji - Preskusi in meritve - 43. del: Zaščitni indeks sledenja (PTI)
Standard IEC 63522-43:2025 se uporablja za preskušanje, vključno z ustreznimi stopnjami strogosti ter pogoji za meritve in preskuse, ki so bili zasnovani za ocenjevanje zmožnosti delovanja preskušancev v pričakovanih pogojih med transportom in skladiščenjem ter v vseh vidikih operativne uporabe. Ta dokument določa standardno preskusno metodo za vrednotenje ustreznih materialov z ustreznimi vrednostmi upornosti sledenja.
General Information
- Status
- Published
- Public Enquiry End Date
- 31-Oct-2023
- Publication Date
- 18-Feb-2026
- Technical Committee
- ISS EIT.ERE - All-or-nothing electrical relays
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 04-Feb-2026
- Due Date
- 11-Apr-2026
- Completion Date
- 19-Feb-2026
Relations
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
Overview
SIST EN IEC 63522-43:2026 - Electrical Relays - Tests and Measurements - Part 43: Proof Tracking Index (PTI) - defines standardized test methods for evaluating the tracking resistance of insulating materials used in electrical relays. This standard is essential for manufacturers, laboratories, and quality assurance professionals who need reliable and repeatable methods to assess material performance under transportation, storage, and operational conditions.
The main goal of this part of IEC 63522 is to specify procedures and requirements for determining the ability of relay specimens to withstand electrical stress and contaminant exposure, thereby ensuring the reliability and safety of electrical relays in actual use.
Key Topics
- Proof Tracking Index (PTI): The numerical value representing the voltage at which a material can withstand tracking (formation of conductive paths) without failure during the standard test. This characterizes the insulation's resistance to surface electrical breakdown due to environmental factors.
- Standardized Test Procedures: Testing is based on methods outlined in IEC 60112, which specifies the use of AC voltage between 100 V and 600 V and a defined contaminating solution.
- Evaluation Criteria: The test is considered positive (“pass”) if no tracking failure or persistent flame occurs over a preset number of liquid drops on the test specimen under voltage.
- Specimen Requirements: Clear instructions are provided on specimen size, thickness, number of samples (minimum five), and preparation, including the use of special specimens if standard relay surfaces are too small.
- Material Groups: Materials are classed into groups (I, II, IIIa, IIIb) based on the PTI value, helping categorize insulation materials for suitable application environments.
Applications
SIST EN IEC 63522-43:2026 is widely applied in:
- Product Compliance and Safety: Ensuring that relays used in electrical equipment meet international safety and performance criteria with regard to their insulation resistance and ability to withstand tracking.
- Quality Assurance: Providing manufacturers and testing laboratories with a repeatable method to assess batches of insulating materials or finished relays before market release.
- Material Development and Selection: Helping engineers choose suitable materials for relay insulation based on the standardized tracking resistance categories, supporting innovation and compliance in product design.
- Failure Analysis: Assisting in the investigation of relay failures by offering a recognized method to pinpoint insulation weaknesses that might occur under field conditions.
- Regulatory Certification: Supporting formal certification processes for electrical relays in regions where compliance with IEC standards is mandatory or highly recommended.
Related Standards
Implementing this standard may also require reference to the following documents:
- IEC 60112:2020 - Method for the determination of the proof and the comparative tracking indices of solid insulating materials. This forms the foundational method referenced for PTI testing.
- IEC 63522-0 - Electrical relays - Tests and Measurements - Part 0: General and Guidance. Provides general testing guidelines and terminology for the EN IEC 63522 series.
- Other Parts of IEC 63522: Covering additional tests and measurements for electrical relays.
Practical Value
Adhering to SIST EN IEC 63522-43:2026 provides manufacturers and testing organizations with:
- Reliable, internationally recognized procedures for measuring insulation tracking resistance
- Clear documentation and reporting requirements to facilitate audits and certification
- Greater assurance of relay durability, safety, and suitability for end-use environments
By following this standard, organizations help ensure that electrical relays remain safe and functional, reducing the risk of insulation failure, electrical shorts, or downtime in essential systems. This makes SIST EN IEC 63522-43:2026 a key reference for quality and safety in the electrical relay industry.
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Frequently Asked Questions
SIST EN IEC 63522-43:2026 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Electrical relays - Tests and Measurements - Part 43: Proof tracking index (PTI)". This standard covers: IEC 63522-43:2025 This document is used for testing along with the appropriate severities and conditions for measurements and tests designed to assess the ability of specimens to perform under expected conditions of transportation, storage and all aspects of operational use. This document defines a standard test method for evaluation of appropriate materials having appropriate values of tracking resistance.
IEC 63522-43:2025 This document is used for testing along with the appropriate severities and conditions for measurements and tests designed to assess the ability of specimens to perform under expected conditions of transportation, storage and all aspects of operational use. This document defines a standard test method for evaluation of appropriate materials having appropriate values of tracking resistance.
SIST EN IEC 63522-43:2026 is classified under the following ICS (International Classification for Standards) categories: 29.120.70 - Relays. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN IEC 63522-43:2026 has the following relationships with other standards: It is inter standard links to oSIST prEN IEC 63522-0:2025, SIST EN IEC 60112:2021. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN IEC 63522-43:2026 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-marec-2026
Električni releji - Preskusi in meritve - 43. del: Zaščitni indeks sledenja (PTI)
Electrical relays - Tests and Measurements - Part 43: Proof tracking index (PTI)
Elektrische Relais – Mess- und Prüfverfahren – Teil 43: Prüfzahl der Kriechwegbildung
(PTI)
Relais électriques - Essais et mesurages - Partie 43: Indice de tenue au cheminement
(ITC)
Ta slovenski standard je istoveten z: EN IEC 63522-43:2026
ICS:
29.120.70 Releji Relays
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 63522-43
NORME EUROPÉENNE
EUROPÄISCHE NORM January 2026
ICS 29.120.70
English Version
Electrical relays - Tests and measurements - Part 43: Proof
tracking index (PTI)
(IEC 63522-43:2025)
Relais électriques - Essais et mesurages - Partie 43: Indice Elektrische Relais - Mess- und Prüfverfahren - Teil 43:
de tenue au cheminement (ITC) Prüfzahl der Kriechwegbildung (PTI)
(IEC 63522-43:2025) (IEC 63522-43:2025)
This European Standard was approved by CENELEC on 2026-01-06. 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
© 2026 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 63522-43:2026 E
European foreword
The text of document 94/1076/FDIS, future edition 1 of IEC 63522-43, prepared by TC 94 "Electrical
relays" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2027-01-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2029-01-31
document have to be withdrawn
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 63522-43:2025 was approved by CENELEC as a European
Standard without any modification.
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 60112 2020 Method for the determination of the proof EN IEC 60112 2020
and the comparative tracking indices of
solid insulating materials
1 2
IEC 63522-0 – Electrical relays - Tests and Measurements EN IEC 63522-0 –
- Part 0: General and Guidance
Under preparation. Stage at the time of publication: IEC CCDV 63522-0:2024.
Under preparation. Stage at the time of publication: prEN IEC 63522-0:2025.
IEC 63522-43 ®
Edition 1.0 2025-12
INTERNATIONAL
STANDARD
Electrical relays - Tests and measurements -
Part 43: Proof tracking index (PTI)
ICS 29.120.70 ISBN 978-2-8327-0888-0
IEC 63522-43:2025-12(en)
IEC 63522-43:2025 © IEC 2025
CONTENTS
FOREWORD . 2
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Test procedure . 5
4.1 Purpose . 5
4.2 Procedure . 5
4.3 Conditions . 6
5 Evaluation . 6
5.1 General . 6
5.2 Test report . 6
Table 1 – Material groups . 6
IEC 63522-43:2025 © IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Electrical relays -
Tests and measurements -
Part 43: Proof tracking index (PTI)
FOREWORD
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