Sets out minimum clearances in air between live parts of bushings on oil-immersed power transformers and objects at earth potential. The text has been reproduced from IEC 76-3-1:1987 and the tabulated minimum clearances have been modified.
AS 2374.3.1:1992 history
1970AS 2374.3.1:1992 Power transformers - Insulation levels and dielectric tests - External clearances in air