The test method applies to all types of insulating liquids of nominal viscosity up to 350 mm2s$-1 at 40C. It is appropriate both for acceptance testing on unused liquids at the time of their delivery and for establishing the condition of samples taken in monitoring and maintenance of equipment.
BS EN 60156:1996 history
0000 BS EN 60156:1996(1999)
1996BS EN 60156:1996 Insulating liquids. Determination of the breakdown voltage at power frequency. Test method