Measurement of relative permittivity, dielectric dissipation factor and d.c. resistivity of insulating liquids

This technical document establishes a standardized methodology for assessing key dielectric properties of insulating liquids. It provides detailed procedures for determining relative permittivity, the dielectric loss factor, and direct current volume resistivity. These parameters are critical for evaluating the quality and performance of insulating fluids used in high-voltage electrical equipment. The measurement techniques described herein ensure consistency and reliability in laboratory testing environments across different facilities. By adhering to the specified experimental conditions and equipment calibration requirements, operators can obtain comparable results. The standard outlines sample preparation methods, testing apparatus specifications, and data interpretation guidelines. It aims to eliminate variability arising from differing test practices, thereby supporting the safe and efficient operation of electrical systems. The document serves as a reference for manufacturers, testing laboratories, and industry professionals involved in the evaluation of liquid insulation materials. Its provisions facilitate international trade and regulatory compliance by promoting uniform testing protocols. The content focuses exclusively on the technical aspects of measurement without addressing broader application scenarios or maintenance strategies.