Insulating Liquids - Determination of the Breakdown Voltage at Power Frequency - Test Method
|Publication Date:||1 July 1995|
|ICS Code (Insulating oils):||29.040.10|
|ICS Code (29.035.40):||29.035.40|
|ICS Code (Other standards related to electricity and magnetism):||17.220.99|
This International Standard specifies the method for determining the dielectric breakdown voltage of insulating liquids at power frequency. The test portion, contained in a specified apparatus, is subjected to an increasing a.c. electrical field by means of a constant rate of voltage rise until breakdown occurs.
The method applies to all types of insulating liquids of nominal viscosity up to 350 mm2s-1 at 40 degrees C. 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.