变压器套管尺寸标准化 第1部分：额定电压12 kV至52 kV、额定电流630 A至3 150 A的中压套管

[中文适用范围]： IEC TS 63493-1:2025 规定了主要参数，以促进中压套管的互换性，或至少定义一些框架条件：- Um 从 12 kV 到 52 kV（含）；- Ir 从 630 A 到 3 150 A（含）。本文件涉及按照 IEC 60076 系列标准的非电容分级套管，用于电力变压器（通常用于带储油柜的变压器）。本文件仅考虑液体至空气型套管，不考虑液体至液体型、空气至空气型套管，以及用于油枕在油箱内的变压器套管。中压（MV）定义至 52 kV；该值用于涵盖特定绝缘等级或高污染等级，即使其应用领域非常有限。采用瓷质和聚合物外部绝缘的两种解决方案均可使用，并需确保互换性（在机械和电气性能方面）。 [外文原描述]： IEC TS 63493-1:2025 specifies the main parameters to facilitate interchangeability or at least to define some frame conditions of MV bushings: - with Um from 12 kV up to and including 52 kV; - Ir from 630 A up to and including 3 150 A. This document deals with non-capacitance graded bushings for Power Transformers, according to the IEC 60076 series (usually for transformer with conservator). In this document only liquid to air bushings are considered. Bushings of liquid-to-liquid and air-to-air type and bushings for transformers with air-cushion in tank are not considered. MV is considered up to 52 kV; this value is used to cover specific insulation levels or for high pollution levels, even if the field of application is very restricted. Both solutions with external insulation in porcelain and polymeric can be used and need to enable interchangeability (in terms of mechanical and electrical performance).