IEC 60599:1999 ED2

Mineral oil-impregnated electrical equipment in service - Guide to the interpretation of dissolved and free gases analysis IEC 60599:1999 ED2

Publication date:   Mar 31, 1999

Scope

Describes how the concentrations of dissolved gases or free gases may be interpreted to diagnose the condition of oil-filled electrical equipment in service and suggests future action. Applicable to electrical equipment filled with mineral insulating oil and insulated with cellulosic paper or pressboard-based solid insulation. Information about specific types of equipment
such as transformers (power, instrument, industrial, railways, distribution), reactors, bushings, switchgear and oil-filled cables is given only as an indication in the application notes. May be applied only with caution to other liquid-solid insulating systems.
In any case, the indications obtained should be viewed only as guidance and any resulting action should be undertaken only with proper engineering judgement.