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IEC 60567 Ed. 5.0 b:2023

Oil-filled electrical equipment - Sampling of free gases and analysis of free and dissolved gases in mineral oils and other insulating liquids - Guidance
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IEC 60567 Ed. 5.0 b:2023

Oil-filled electrical equipment - Sampling of free gases and analysis of free and dissolved gases in mineral oils and other insulating liquids - Guidance

PUBLISH DATE 2023
PAGES 132
IEC 60567 Ed. 5.0 b:2023

Oil-filled electrical equipment - Sampling of free gases and analysis of free and dissolved gases in mineral oils and other insulating liquids - Guidance

IEC 60567:2023 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 for sampling oil from oil-filled equipment such as power and instrument transformers, reactors, bushings, oil-filled cables, and oil-filled tank-type capacitors are no longer covered by this document, but are instead described in IEC 60475:2022, 4.2.

Before analysing the gases dissolved in oil, they are first extracted from the oil. Three basic methods are described:

  • Extraction by vacuum (Toepler and partial degassing),
  • Displacement of the dissolved gases by bubbling the carrier gas through the oil sample (stripping),
  • Partition of gases between the oil sample and a small volume of the carrier gas (headspace).

The gases are analysed quantitatively after extraction by gas chromatography; a method of analysis is described.

Free gases from gas-collecting relays are analysed without preliminary treatment.

SDO IEC: International Electrotechnical Commission
Document Number IEC 60567
Publication Date Dec. 1, 2023
Language b - English & French
Page Count 132
Revision Level 5.0
Supercedes
Committee 10
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