NB/T 11389-2023 in English

The industry standard NB/T 11389-2023, titled "Test Method for Dielectric Properties of Insulating Materials for Power Transformers Using Frequency Domain Dielectric Spectroscopy," was issued on December 28, 2023, and will come into effect on June 28, 2024. This standard provides a comprehensive methodology for evaluating the dielectric properties of insulating materials used in power transformers through frequency domain dielectric spectroscopy (FDS).

The standard outlines the procedures for sample preparation, measurement conditions, and data analysis, ensuring consistency and reliability in the assessment of dielectric properties. It is particularly relevant for materials such as oil-impregnated paper, pressboard, and other insulating components that are critical to the performance and longevity of power transformers. By employing FDS, the standard enables the detection of aging, moisture content, and other factors that can affect the dielectric performance of these materials.

NB/T 11389-2023 is essential for manufacturers, testing laboratories, and utilities involved in the production and maintenance of power transformers. It provides a standardized approach to ensure the quality and reliability of insulating materials, thereby contributing to the overall safety and efficiency of power transmission and distribution systems.