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EN IEC 60270:2025

High-voltage test techniques - Charge-based measurement of partial discharges

Edition date: 2025-08-01
In Force
Available languages: English, French
Summary: IEC 60270:2025 is applicable to the charge-based measurement of partial discharges which occur in electrical apparatus, components or systems when tested with alternating voltages (AC) up to 500 Hz or with direct voltage (DC). This document: – defines the terms used; – defines the quantities to be measured; – describes the measurement frequencies as well as the test and measuring circuits which may be used; – defines analogue and digital measuring methods required for common applications; – specifies methods for calibration and requirements of instruments used for calibration; – gives guidance on test procedures; – gives some assistance concerning the discrimination of partial discharges from external interference. The provisions of this document are used in the drafting of specifications relating to partial discharge measurements for specific power apparatus. It deals with electrical measurements of impulsive (short-duration) partial discharges, but reference is also made to non-electrical methods primarily used for partial discharge location (see Annex F). Diagnosis of the behaviour of specific power apparatus can be aided by digital processing of partial discharge data (see Annex E) and also by non-electrical methods that are primarily used for partial discharge location (see Annex F). This document is primarily concerned with electrical measurement of partial discharge in terms of apparent charge for specific power apparatus made during tests with alternating voltage, but specific problems which arise when tests are made with direct voltage are considered in Clause 11. The terminology, definitions, basic test circuits and procedures often also apply to tests at other frequencies, but special test procedures and measuring system characteristics which are not considered in this document may be required. For measurements at higher frequency ranges, see IEC TS 62478. Annex A provides normative requirements for performance tests on calibrators. This fourth edition cancels and replaces the third edition published in 2000, and Amendment 1:2015. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) Title modified. b) Use with alternating voltages up to 500 Hz or with direct voltage. c) Clear focus on charge-based partial discharge measurements. d) Streamlined performance checks for partial discharge measurement system components. e) Improved normative Annex A for performance tests on calibrators. f) Revised and new informative Annexes. In a future revision, this document will seek horizontal publication status in accordance with IEC Guide 108.

L'IEC 60270:2025 s'applique aux mesurages fondés sur les charges pour les décharges partielles (DP) qui se produisent dans les appareillages, composants ou systèmes électriques soumis à des essais sous des tensions alternatives inférieures ou égales à 500 Hz ou sous une tension continue. Le présent document: – définit les termes utilisés; – définit les grandeurs à mesurer; – décrit les fréquences de mesure, ainsi que les circuits d'essai et de mesure qui peuvent être utilisés; – définit les méthodes de mesure analogique et numérique exigées pour les applications courantes; – spécifie les méthodes d'étalonnage et les exigences relatives aux appareils de mesure utilisés pour l'étalonnage; – fournit des recommandations pour les procédures d'essai; – donne des conseils pour distinguer les décharges partielles des interférences externes. Les dispositions du présent document sont utilisées pour élaborer les spécifications relatives aux mesurages de décharges partielles dans le cadre d'appareillages de puissance spécifiques. Le présent document traite des mesurages électriques des décharges partielles impulsionnelles (de courte durée), mais il est également fait référence à des méthodes non électriques, principalement utilisées pour la localisation des décharges partielles (voir l'Annexe F). Les diagnostics concernant le comportement d'appareillages de puissance spécifiques peuvent être facilités par le traitement numérique des données de décharges partielles (voir l'Annexe E), mais également par des méthodes non électriques, utilisées principalement pour la localisation des décharges partielles (voir l'Annexe F). Le présent document traite essentiellement des mesurages électriques de décharges partielles fondés sur la charge apparente d'appareillages de puissance spécifiques, effectués dans le cadre d'essais sous une tension alternative, mais l'Article 11 traite néanmoins des problèmes particuliers susceptibles de se produire lors d'essais sous une tension continue. La terminologie, les définitions, les circuits d'essai de référence et les procédures sont souvent utilisés pour les essais à d'autres fréquences de mesure des DP, mais des procédures d'essai et des caractéristiques de systèmes de mesure particulières, qui ne sont pas traitées dans le présent document, peuvent être exigées. Pour les mesurages effectués dans des plages de fréquences supérieures, voir l'IEC TS 62478. L'Annexe A fournit les exigences normatives relatives aux essais de détermination des caractéristiques des dispositifs d'étalonnage. Cette quatrième édition annule et remplace la troisième édition parue en 2000 et l'Amendement 1:2015. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) modification du titre; b) utilisation de tensions alternatives inférieures ou égales à 500 Hz ou d'une tension continue; c) valorisation des mesurages de décharges partielles fondés sur les charges; d) simplification des contrôles des caractéristiques pour les composants des systèmes de mesure de décharges partielles; e) amélioration de l'Annexe A normative pour les essais de détermination des caractéristiques des dispositifs d'étalonnage; f) révision des annexes informatives existantes et ajout d'annexes informatives. Dans une future révision, ce document cherchera
ICS: 19.080-Electrical and electronic testing, 17.220.20-Measurement of electrical and magnetic quantities
CTN: CLC/SR 42 - 1258009

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