dnaSRPS EN IEC 60156:2025

Izolacione tečnosti - Određivanje probojnog napona pri mrežnoj frekvenciji - Metoda ispitivanja

Insulating liquids - Determination of the breakdown voltage at power frequency - Test method

Apstrakt

IEC 60156:2025 specifies the method for determining the dielectric breakdown voltage of insulating liquids at power frequency. The test procedure is performed in a specified apparatus, where the oil sample is subjected to an increasing AC electrical field until breakdown occurs. The method applies to all types of insulating liquids of nominal viscosity up to 350 mm2/s at 40 °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.