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)
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
The kSIST prEN IEC 61810-7-43:2024 standard, titled Electrical relays – Tests and measurements – Part 43: Proof tracking index (PTI), published by the CLC, specifies a standardized test method to evaluate the tracking resistance of insulating materials used in electrical relays. This standard focuses on the ability of materials to resist electrical tracking during transportation, storage, and operational conditions. It ensures that insulating materials maintain performance and safety under electrical stress combined with environmental contamination.
The PTI test evaluates the durability of plastic insulating materials against the progressive formation of conductive paths (tracking) which can lead to insulation failure. By defining test conditions, procedures, and evaluation criteria, kSIST prEN IEC 61810-7-43:2024 promotes reliability and quality assurance in relay manufacturing.
Key Topics
Scope and Purpose: Defines testing methods to measure the proof tracking index, indicating the material’s ability to withstand electrical tracking without failure.
Proof Tracking Index (PTI): Represents the voltage level (in volts) at which specimens withstand electrical stress for 50 drops of contaminating solution without tracking or persistent flame.
Testing Procedure:
- Uses AC voltage between 100 V and 600 V applied to flat specimens (minimum 15 mm × 15 mm, thickness ≥ 3 mm).
- Test follows the methodology in IEC 60112 using test solution A (water with contaminants).
- Five specimens are tested; failure criteria include tracking failure or persistent flame.
- If one specimen fails out of five, a second set of five can be tested. Up to one failure in ten specimens is acceptable.
Material Groups by PTI Values:
- Group I: PTI ≥ 600 V
- Group II: 400 V ≤ PTI < 600 V
- Group IIIa: 175 V ≤ PTI < 400 V
- Group IIIb: 100 V ≤ PTI < 175 V
Evaluation Criteria: Tests are positive if no failures occur during 50 drops. Failure leads to repeat testing or specimen modification.
Test Reporting Requirements: Includes detailed material description, specimen size and thickness, test voltage, number of drops, and observations such as tracking failure or flame occurrence.
Applications
Electrical Relays Quality Control: Ensures insulating materials used in all-or-nothing electrical relays meet safety and performance demands under electrical stress combined with environmental contaminants.
Material Qualification: Assists manufacturers in selecting plastics with appropriate tracking resistance, vital for maintaining insulation integrity in relay components.
Safety Assurance: Helps prevent tracking failures that can cause insulation breakdown, short circuits, and fire hazards in electrical installations.
Research and Development: Provides standardized test methods for new insulating materials or relay designs to verify compliance before market introduction.
Regulatory Compliance: Supports adherence to international safety standards related to electrical insulation and relay operation.
Related Standards
IEC 60112:2020 – Method for the determination of proof and comparative tracking indices of solid insulating materials. This is the basis for the test procedure referenced in kSIST prEN IEC 61810-7-43:2024.
IEC 61810-1:2015 – Electrical relays – Part 1: General and guidance for testing electrical relays. The proof tracking index test is used in conjunction with this standard for comprehensive relay evaluation.
IEC 61810 Series – Governs various aspects and testing protocols for all-or-nothing electrical relays, providing the structural framework for relay testing.
EN IEC 63522 Series – Covers the broad set of testing and measurement standards for electrical relays ensuring global interoperability and safety.
Keywords: Proof tracking index, PTI, electrical relays testing, tracking resistance, insulation materials, relay safety standards, IEC 63522-43, kSIST prEN IEC 61810-7-43:2024, electrical insulation testing, electrical relay materials, tracking failure prevention.
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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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