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Info iec60422 ed4 0 b This is a preview - click here to buy the full publication INTERNATIONAL STANDARD IEC Edition - NORME INTERNATIONALE Mineral insulating oils in electrical equipment ?? Supervision and maintenance guidance Huiles minérales isolantes d

This is a preview - click here to buy the full publication INTERNATIONAL STANDARD IEC Edition - NORME INTERNATIONALE Mineral insulating oils in electrical equipment ?? Supervision and maintenance guidance Huiles minérales isolantes dans les matériels électriques ?? Lignes directrices pour la maintenance et la surveillance INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE ICS PRICE CODE CODE PRIX X ISBN - - - - Warning Make sure that you obtained this publication from an authorized distributor Attention Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé Registered trademark of the International Electrotechnical Commission Marque déposée de la Commission Electrotechnique Internationale CThis is a preview - click here to buy the full publication ?? ?? F D IEC CONTENTS FOREW ORD INTRODUCTION Scope Normative references Terms and de ?nitions Properties and deterioration degradation of oil Oil tests and their signi ?cance General Colour and appearance Breakdown voltage Water content General Water in oil Water content in the oil paper-system Interpretation of results Acidity Dielectric dissipation factor DDF and resistivity Inhibitor content and oxidation stability Oxidation stability Monitoring of uninhibited oils Monitoring of inhibited oils Sediment and sludge Interfacial tension IFT Particle count Flash point Compatibility of insulating oils Pour point Density Viscosity Polychlorinated biphenyls PCBs Corrosive sulphur Dibenzyl disulphide DBDS Passivator Sampling of oil from equipment Categories of equipment Evaluation of mineral insulating oil in new equipment Evaluation of oil in service General Frequency of examination of oils in service Testing procedures General Field tests Laboratory tests Classi ?cation of the condition of oils in service Corrective action CThis is a preview - click here to buy the full publication F D IEC ?? ?? Handling and storage Treatment WARNING Reconditioning General Reconditioning equipment Application to electrical equipment Reclaiming General Reclaiming by percolation Reclaiming by contact Renewal of additives Decontamination of oils containing PCBs General Dehalogenation processes using sodium and lithium derivatives Dehalogenation processes using polyethylene glycol and potassium hydroxide KPEG Dehalogenation in continuous mode by closed circuit process Replacement of oil in electrical equipment Replacement of oil in transformers rated below kV and in switchgear and associated equipment Replacement of oil in transformers rated kV and above Replacement of oil in electrical equipment contaminated with PCB Passivation Annex A informative Evaluating water in oil and insulation Annex B informative Particles Annex C informative Test method for determination of sediment and sludge Bibliography Figure ?? Example of variation in saturation water content with oil temperature and acidity for insulating oil originally conforming to IEC Figure ?? Example of variation of resistivity with temperature for insulating oils Figure A ?? Typical correction factors Table ?? Tests for in-service mineral insulating oils Table ?? Categories of equipment Table ?? Recommended limits for mineral insulating oils after ?lling in new electrical equipment prior to energization Table ?? Recommended frequency of testing a Table ?? Application and interpretation of tests of Table ?? Summary of typical actions Table ?? Conditions for processing inhibited and or passivator containing mineral insulating oils Table A