BS EN 60567:2011:2012 Edition
$198.66
Oil-filled electrical equipment. Sampling of gases and analysis of free and dissolved gases. Guidance
| Published By | Publication Date | Number of Pages |
| BSI | 2012 | 62 |
IEC 60567:2011 deals with the techniques for sampling free gases from gas-collecting relays from power transformers. Three methods of sampling free gases are described. The techniques described take account, on the one hand, of the problems peculiar to analyses associated with acceptance testing in the factory, where gas contents of oil are generally very low and, on the other hand, of the problems imposed by monitoring equipment in the field, where transport of samples may be by un-pressurized air freight and where considerable differences in ambient temperature may exist between the plant and the examining laboratory. Since the publication of the previous edition, CIGRE TF.D1.01.15 has made progress in several areas of dissolved gas analysis (DGA). These advances are included in this fourth edition.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 6 | English CONTENTS |
| 9 | INTRODUCTION |
| 11 | 1 Scope 2 Normative references |
| 12 | 3 Sampling of gases from gas-collecting (Buchholz) relays 3.1 General remarks 3.2 Sampling of free gases by syringe |
| 13 | Figures Figure 1 – Sampling of gas by syringe |
| 14 | 3.3 Sampling of free gases by displacement of oil Figure 2 – Sampling of free gases by oil displacement |
| 15 | 3.4 Sampling of free gases by vacuum Figure 3 – Sampling of free gases by vacuum |
| 16 | 3.5 Sampling of oil from oil filled equipment 4 Labelling of gas samples 5 Sampling, labelling and transferring of oil from oil-filled equipment 5.1 Sampling and labelling of oil 5.2 Transfer of oil for DGA analysis Tables Table 1 – Information required for gas samples |
| 17 | 6 Preparation of gas-in-oil standards 6.1 General remark 6.2 First method: preparation of a large volume of gas-in-oil standard |
| 19 | Figure 4 – First method of preparing gas-in-oil standards Bibliographie |
| 20 | 6.3 Second method: preparation of gas-in-oil standards in a syringe or a vial |
| 21 | Figure 5 – Second method for preparing gas-in-oil standards |
| 22 | 7 Extraction of gases from oil 7.1 General remarks |
| 23 | 7.2 Multi-cycle vacuum extraction using Toepler pump apparatus |
| 25 | Figure 6 – Example of a Toepler pump extraction apparatus |
| 27 | 7.3 Vacuum extraction by partial degassing method |
| 28 | 7.4 Stripping extraction method |
| 29 | Figure 7 – Types of glass strippers |
| 30 | Figure 8 – Stainless steel stripper |
| 31 | Figure 9 – Schematic arrangement for connecting an oil stripper to a gas chromatograph |
| 32 | 7.5 Headspace method Figure 10 – Schematic representation of headspace sampler |
| 34 | Figure 11 – Vial filled with water |
| 36 | Figure 12 – Revolving table |
| 37 | Table 2 – Examples of headspace operating conditions |
| 42 | Table 3 – Headspace partition coefficients at 70 °C in mineral insulating oil |
| 43 | 8 Gas analysis by gas-solid chromatography 8.1 General remarks Table 4 – Examples of gas chromatographic operating conditions |
| 44 | 8.2 Outline of suitable methods using Table 4 8.3 Apparatus |
| 45 | Figure 13 – Schematic arrangement for gas chromatography 8 Analyse des gaz par chromatographie gaz-solide 8.1 Remarques générales Tableau 3 – Coefficients de partage de l’espace de tête à 70 °C dans les huiles minérales isolantes |
| 47 | 8.4 Preparation of apparatus 8.5 Analysis 8.6 Calibration of the chromatograph |
| 48 | 8.7 Calculations 9 Quality control 9.1 Verification of the entire analytical system |
| 49 | 9.2 Limits of detection and quantification 9.3 Repeatability, reproducibility and accuracy Table 5 – Required limits of detection in oil |
| 50 | Figure 12 – Table rotative |
| 51 | 10 Report of results Table 6 – Examples of accuracy of extraction methods |
| 53 | Annex A (informative) Correction for incomplete gas extractionin partial degassing method by calculation Table A.1 – Examples of solubility coefficients ai (at 25 ºC)reported by CIGRE TF D1.01.15 |
| 55 | Annex B (informative) Mercury-free and shake test versions of the standard extraction methods |
| 56 | Figure B.1 – Schematic representation of methods in Annex B |
| 57 | Annex C (informative) Preparation of air-saturated standards Table C.1 – Examples of solubility values of air for different oil types Table C.2 – Examples of temperature variations for oxygenand nitrogen solubility in mineral oil 7.3 Extraction sous vide par la méthode de dégazage partiel |
| 58 | Annex D (informative) Correction for gas bubbles in syringes and air gap in rigid bottles |
| 59 | Annex E (informative) Procedure for comparing gas monitor readings to laboratory results |
| 60 | Bibliography |
