绝缘液体 电工用未使用的改性或混合酯

[中文适用范围]： 本文件规定了用于电工应用的未使用改性酯或未使用酯混合物的特性要求。它不包括含有任何比例使用过的液体的液体。 本文件所涵盖的液体主要用于变压器应用。 未使用的改性/合成酯来源于天然或合成基础，或两者的混合物。本文件涵盖了其他特定于天然酯（IEC 62770）或合成酯（IEC 61099）的标准未涵盖的各种酯液体。 由于涉及各种液体类别，本文件还涵盖了某些性能特征的广泛值范围。一个重要特性是粘度，它会影响电气设备的设计和冷却性能。根据不同液体的运动粘度定义了一个分类。建立了低粘度酯液体类别。 [外文原描述]： IEC 63012:2019 defines requirements for the characterization of unused modified esters or blends of unused esters used as insulating liquids for electrotechnical applications. It does not cover liquids that contain any proportion of used liquids. The liquids covered by this document are intended mainly for transformer applications. Unused modified/synthetized esters are derived from a natural or synthetic base, or are blends of both. This document covers a variety of ester liquids not covered by other standards specific to natural esters (IEC 62770) or synthetic esters (IEC 61099). As it addresses various categories of liquids, this document also covers a wide range of values for certain performance characteristics. An important property is viscosity, which can affect the design and cooling performance of electrical equipment. A categorization is defined based on the kinematic viscosity of the different liquids. The category of low viscosity ester liquids is established.