BS EN 60422:2013:2014 Edition
$189.07
Mineral insulating oils in electrical equipment. Supervision and maintenance guidance
| Published By | Publication Date | Number of Pages |
| BSI | 2014 | 50 |
This International Standard 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 IEC 60296, 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 is also intended to assist 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.
The standard includes recommendations on tests and evaluation procedures and outlines methods for reconditioning and reclaiming oil and the decontamination of oil contaminated with PCBs.
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.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 7 | English CONTENTS |
| 9 | INTRODUCTION |
| 11 | 1 Scope 2 Normative references |
| 12 | 3 Terms and definitions |
| 13 | 4 Properties and deterioration/degradation of oil |
| 14 | 5 Oil tests and their significance 5.1 General Table 1 – Tests for in-service mineral insulating oils |
| 15 | 5.2 Colour and appearance 5.3 Breakdown voltage 5.4 Water content 5.4.1 General 5.4.2 Water in oil |
| 17 | 5.4.3 Water content in the oil/paper-system Figure 1 – Example of variation in saturation water content with oil temperature and acidity for insulating oil originally conforming to IEC 60296 |
| 18 | 5.4.4 Interpretation of results 5.5 Acidity 5.6 Dielectric dissipation factor (DDF) and resistivity |
| 20 | Figure 2 – Example of variation of resistivity with temperature for insulating oils |
| 21 | 5.7 Inhibitor content and oxidation stability 5.7.1 Oxidation stability 5.7.2 Monitoring of uninhibited oils 5.7.3 Monitoring of inhibited oils 5.8 Sediment and sludge |
| 22 | 5.9 Interfacial tension (IFT) 5.10 Particle count 5.11 Flash point |
| 23 | 5.12 Compatibility of insulating oils 5.13 Pour point 5.14 Density 5.15 Viscosity |
| 24 | 5.16 Polychlorinated biphenyls (PCBs) 5.17 Corrosive sulphur |
| 25 | 5.18 Dibenzyl disulphide (DBDS) 5.19 Passivator 6 Sampling of oil from equipment |
| 26 | 7 Categories of equipment 8 Evaluation of mineral insulating oil in new equipment Table 2 – Categories of equipment |
| 27 | 9 Evaluation of oil in service 9.1 General Table 3 – Recommended limits for mineral insulating oils after fillingin new electrical equipment prior to energization |
| 28 | 9.2 Frequency of examination of oils in service |
| 29 | 9.3 Testing procedures 9.3.1 General 9.3.2 Field tests Table 4 – Recommended frequency of testing |
| 30 | 9.3.3 Laboratory tests 9.4 Classification of the condition of oils in service 9.5 Corrective action |
| 31 | Table 5 – Application and interpretation of tests (1 of 4) |
| 35 | 10 Handling and storage Table 6 – Summary of typical actions |
| 36 | 11 Treatment 11.1 WARNING |
| 37 | 11.2 Reconditioning 11.2.1 General |
| 38 | 11.2.2 Reconditioning equipment Table 7 – Conditions for processing inhibited and/orpassivator containing mineral insulating oils |
| 39 | 11.2.3 Application to electrical equipment |
| 40 | 11.3 Reclaiming 11.3.1 General 11.3.2 Reclaiming by percolation |
| 41 | 11.3.3 Reclaiming by contact 11.3.4 Renewal of additives 11.4 Decontamination of oils containing PCBs 11.4.1 General 11.4.2 Dehalogenation processes using sodium and lithium derivatives |
| 42 | 11.4.3 Dehalogenation processes using polyethylene glycol and potassium hydroxide (KPEG) 11.4.4 Dehalogenation in continuous mode by closed circuit process 12 Replacement of oil in electrical equipment 12.1 Replacement of oil in transformers rated below 72,5 kV and in switchgear and associated equipment 12.2 Replacement of oil in transformers rated 72,5 kV and above |
| 43 | 12.3 Replacement of oil in electrical equipment contaminated with PCB 13 Passivation |
| 44 | Annex A (informative) Evaluating water in oil and insulation Figure A.1 – Typical correction factors |
| 45 | Table A.1 – Guidelines for interpreting data expressed in per cent saturation |
| 46 | Annex B (informative) Particles Table B.1 – Typical contamination levels (particles) encountered on power transformer insulating oil as measured using IEC 60970 |
| 47 | Annex C (informative) Test method for determination of sediment and sludge |
| 48 | Bibliography |
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IEC 60422:2013
Mineral insulating oils in electrical equipment – Supervision and maintenance guidance Published By Publication Date…
