IEC 60567:2011

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Sampling of gases from gas-collecting (Buchholz) relays
4 Labelling of gas samples
5 Sampling, labelling and transferring of oil from
   oil-filled equipment
6 Preparation of gas-in-oil standards
7 Extraction of gases from oil
8 Gas analysis by gas-solid chromatography
9 Quality control
10 Report of results
Annex A (informative) - Correction for incomplete gas
        extraction in partial degassing method by calculation
Annex B (informative) - Mercury-free and shake test versions
        of the standard extraction methods
Annex C (informative) - Preparation of air-saturated standards
Annex D (informative) - Correction for gas bubbles in syringes
        and air gap in rigid bottles
Annex E (informative) - Procedure for comparing gas monitor
        readings to laboratory results
Bibliography

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.