Describes a conventional test intended to reveal the extent of physical pollution of the insulating oils by water and other suspended matter, and the advisability of carrying out drying and filtration treatment before the oils are introduced into the apparatus for which they are intended.
IEC 60156:1963 history
0000 IEC 60156:2018 RLV
1995IEC 60156:1995 Insulating liquids - Determination of the breakdown voltage at power frequency - Test method
1970IEC 60156:1963 Method for the determination of the electric strength of insulating oils