Mineral oil-impregnated electrical equipment in service – Guide to the interpretation of dissolved and free gases analysis
|Publication Date:||1 May 2007|
|ICS Code (Transformers. Reactors):||29.180|
|ICS Code (Insulating oils):||29.040.10|
|ICS Code (Other standards related to electricity and magnetism):||17.220.99|
This International Standard is a guide describing how the concentrations of dissolved gases or free gases may be interpreted to diagnose the condition of oil-filled electrical equipment in service and suggest future action.
This guide is 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 (see annex A).
The Guide 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 judgment.