EN 60422:2006
(Main)Mineral insulating oils in electrical equipment - Supervision and maintenance guidance
Mineral insulating oils in electrical equipment - Supervision and maintenance guidance
Gives guidance on the supervision and maintenance of the quality of the insulating oil in electrical equipment. This standard is applicable to mineral insulating oils, originally supplied conforming to EN 60296, and used in transformers, switchgear and other electrical apparatus where oil sampling is reasonably practicable and where the normal operating conditions specified in the equipment specifications apply. This standard assists the power equipment operator to evaluate the condition of the oil and maintain it in a serviceable condition. It also provides a common basis for the preparation of more specific and complete local codes of practice. This standard includes recommendations on tests and evaluation procedures and outlines methods for reconditioning and reclaiming oil and the decontamination of oil contaminated with PCB. NOTE The condition monitoring of electrical equipment, for example by analysis of dissolved gases, furanic compounds or other means is outside the scope of this standard. The main changes with regard to the previous edition are as follows: This standard has been revised to take into account changes in oil and equipment technology and to have due regard for the best practices currently in use world-wide. The action limits for all oil tests have been revised and changes made where necessary to enable users to use current methodology and comply with requirements and regulations affecting safety and environmental aspects. This guidance incorporates changes introduced in associated standards since the publication of the second edition.
Richtlinien zur Überwachung und Wartung von Isolierölen auf Mineralölbasis in elektrischen Betriebsmitteln
Huiles minérales isolantes dans les matériels électriques - Lignes directrices pour la maintenance et la surveillance
Donne les lignes directrices pour la surveillance et la maintenance de la qualité des huiles isolantes dans les appareils électriques. La présente norme est applicable aux huiles minérales isolantes, satisfaisant à l'origine aux exigences de la CEl 60296 et utilisées dans les transformateurs, l'appareillage de connexion et les appareils électriques semblables, pour lesquels la prise d'échantillon d'huile est possible, et lorsque les conditions normales d'exploitation prévues dans les spécifications du matériel sont appliquées. Cette norme a aussi pour but d'aider le personnel d'exploitation à évaluer l'état de l'huile des matériels et de l'assister dans sa tâche afin de conserver l'huile en condition de service. Il fournit également une base commune à l'élaboration des codes de pratique locale plus complets et plus spécifiques. Cette norme inclut les recommandations sur les essais normalisés, les procédures d'évaluation et des éléments de procédés de retraitement et de régénération de l'huile et la décontamination de l'huile contaminée par le PCB. NOTE Le contrôle des conditions des matériels électriques, par exemple par l'analyse des gaz dissous, les mélanges furaniques ou tout autre moyen ne fait pas partie du domaine d'application de la présente norme. Les modifications principales par rapport à l'édition précédente sont les suivantes: La présente norme a été révisée pour tenir compte des évolutions technologiques liées aux huiles et aux matériels et dans le respect des meilleures pratiques en vigueur de par le monde. Les limites d'action pour tous les essais d'huile ont été mis à jour et des changements ont été faits en cas de besoin pour permettre à des utilisateurs d'employer la méthodologie courante et de se conformer aux exigences et aux règlements affectant la sécurité et les aspects environnementaux. La présente norme présentant des lignes directrices, intègre des changements présentés dans les normes associées depuis la publication de la deuxième édition
Mineralna izolacijska olja v električni opremi – Napotki za nadzorovanje in vzdrževanje (IEC 60422:2005)
General Information
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Standards Content (Sample)
STANDARDMineralna izolacijska olja v električni opremi – Napotki za nadzorovanje in vzdrževanje (IEC 60422:2005)Mineral insulating oils in electrical equipment – Supervision
and maintenance guidance (IEC 60422:2005)©
Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljenoReferenčna številkaSIST EN 60422:2006(en)ICS29.040.10
EUROPEAN STANDARD EN 60422 NORME EUROPÉENNE
EUROPÄISCHE NORM May 2006
CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2006 CENELEC -
All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60422:2006 E
ICS 29.040.10; 29.130
English version
Mineral insulating oils in electrical equipment -
Supervision and maintenance guidance (IEC 60422:2005)
Huiles minérales isolantes
dans les matériels électriques - Lignes directrices pour la maintenance
et la surveillance (CEI 60422:2005)
Richtlinien zur Überwachung und Wartung von Isolierölen auf Mineralölbasis
in elektrischen Betriebsmitteln (IEC 60422:2005)
This European Standard was approved by CENELEC on 2006-04-04. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.
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Foreword The text of document 10/636/FDIS, future edition 3 of IEC 60422, prepared by IEC TC 10, Fluids for electrotechnical applications, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60422 on 2006-04-04. The following dates were fixed: – latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement
(dop)
2007-02-01 – latest date by which the national standards conflicting
with the EN have to be withdrawn
(dow)
2009-05-01 Annex ZA has been added by CENELEC. __________ Endorsement notice The text of the International Standard IEC 60422:2005 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 standards indicated: IEC 60567 NOTE Harmonized as EN 60567:2005 (not modified). IEC 60599 NOTE Harmonized as EN 60599:1999 (not modified). IEC 61198 NOTE Harmonized as EN 61198:1994 (not modified). __________
- 3 - EN 60422:2006
Annex ZA
(normative)
Normative references to international publications with their corresponding European publications
The following referenced documents are indispensable for the application 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
When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies.
Publication Year Title EN/HD Year
IEC 60156 - 1) Insulating liquids - Determination of the breakdown voltage at power frequency - Test method EN 60156 1995 2)
IEC 60247 - 1) Insulating liquids - Measurement of relative permittivity, dielectric dissipation factor (tan d) and d.c. resistivity EN 60247 2004 2)
IEC 60296 - 1) Fluids for electrotechnical applications - Unused mineral insulating oils for transformers and switchgear EN 60296 + corr. September 2004 2)2004
IEC 60475 - 1) Method of sampling liquid dielectrics - -
IEC 60666 - 1) Detection and determination of specified anti-oxidant additives in insulating oils HD 415 S1 1981 2)
IEC 60814 - 1) Insulating liquids - Oil-impregnated paper and pressboard - Determination of water by automatic coulometric Karl Fischer titration EN 60814 1997 2)
IEC 60970 - 1) Methods for counting and sizing particles in insulating liquids - -
IEC 61125 - 1) Unused hydrocarbon-based insulating liquids - Test methods for evaluating the oxidation stability - -
IEC 61619 - 1) Insulating liquids - Contamination by polychlorinated biphenyls (PCBs) - Method of determination by capillary column gas chromatography EN 61619 1997 2)
IEC 62021-1 - 1) Insulating liquids - Determination of acidity Part 1: Automatic potentiometric titration EN 62021-1 2003 2)
ISO 2049 - 1) Petroleum products - Determination of colour (ASTM scale) EN 12049 1996 2)
ISO 2719 - 1) Petroleum products and lubricants - Determination of Flash Point Pensky-Martens closed cup method EN ISO 2719 2002 2)
ISO 3016 - 1) Petroleum Oils - Determination of pour point - -
1) Undated reference.
2) Valid edition at date of issue.
- 4 -
Publication Year Title EN/HD Year ISO 3104 - 1) Petroleum products - Transparent and opaque liquids - Determination of kinematic viscosity and calculation of dynamic viscosity EN ISO 3104 1996 2)
ISO 3675 - 1) Crude petroleum and liquid petroleum products - Laboratory determination of density - Hydrometermethod ISO 3675 1998 2)
ASTM D971-99a 2004 Standard test method for interfacial tension of oil against water by the ring method - -
NORME INTERNATIONALECEIIEC INTERNATIONAL STANDARD 60422Troisième éditionThird edition2005-10 Huiles minérales isolantes
dans les matériels électriques – Lignes directrices pour la maintenance
et la surveillance
Mineral insulating oils in electrical equipment – Supervision and maintenance guidance
Pour prix, voir catalogue en vigueur For price, see current catalogue IEC 2005
Droits de reproduction réservés
Copyright - all rights reserved Aucune partie de cette publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et les microfilms, sans l'accord écrit de l'éditeur. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Electrotechnical Commission,
3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, SwitzerlandTelephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch
Web: www.iec.ch CODE PRIX PRICE CODE X Commission Electrotechnique InternationaleInternational Electrotechnical Commission
60422 IEC:2005 – 3 –
CONTENTS FOREWORD.7 INTRODUCTION.11
1 Scope.13 2 Normative references.13 3 Terms and definitions.15 4 General remarks.17 4.1 General caution.17 4.2 Environment.17 5 Properties and deterioration/degradation of oil.19 6 Oil tests and their significance.19 6.1 General.19 6.2 Colour and appearance.21 6.3 Breakdown voltage.21 6.4 Water content.23 6.5 Acidity.29 6.6 Dielectric Dissipation Factor (DDF) and resistivity.29 6.7 Inhibitor content and oxidation stability.35 6.8 Sediment and sludge.37 6.9 Interfacial tension (IFT).37 6.10 Particle count.37 6.11 Flash-point.39 6.12 Compatibility of insulating oils.39 6.13 Pour-point.41 6.14 Density.41 6.15 Viscosity.41 6.16 Polychlorinated biphenyls (PCBs).41 6.17 Corrosive sulphur.41 7 Sampling of oil from equipment.43 8 Categories of equipment.43 9 Evaluation of mineral insulating oil in new equipment.45 10 Evaluation of oil in service.47 10.1 General.47 10.2 Frequency of examination of oils in service.47 10.3 Testing procedures.51 10.4 Classification of the condition of oils in service.51 10.5 Corrective action.53 11 Handling and storage.63 12 Treatment.65 12.1 General.65 12.2 Reconditioning.65 12.3 Reclaiming.73 12.4 Decontamination of oils containing PCB.75
60422 IEC:2005 – 5 –
13 Replacement of oil in electrical equipment.77 13.1 Replacement of oil in transformers rated below 72,5 kV and in switchgear and associated equipment.77 13.2 Replacement of oil in transformers rated 72,5 kV and above.77 13.3 Replacement of oil in electrical equipment contaminated with PCB.77
Annex A (informative)
Sampling temperature below 20 ºC.79 Annex B (informative)
Particles.81 Annex C (informative)
Test method for determination of sediment and sludge.83
Bibliography.85
Figure 1 – Example of the variation in saturation water content with oil temperature
and acidity for insulating oil originally conforming to IEC 60296.25 Figure 2 – Typical correction factors.29 Figure 3 – Example of variation of resistivity with temperature for insulating oils.33
Table 1 – Tests for mineral insulating oils.21 Table 2 – Categories of equipment.43 Table 3 – Recommended limits for mineral insulating oils after filling in new electrical equipment prior to energization.45 Table 4 – Recommended frequency of testing(1).49 Table 5 – Application and interpretation of tests.55 Table 6 – Corrective actions.63 Table 7 – Conditions for processing inhibited mineral insulating oils.67 Table A.1 – Guidelines for interpreting data expressed in percent saturation.79 Table B.1 – Examples of contamination levels (particles) encountered on
power transformer insulating oil as measured by
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