GB/T 311.2-2002 in English

《GB/T 311.2-2002绝缘配合 第2部分:高压输变电设备的绝缘配合使用导则》由TC163（全国高电压试验技术和绝缘配合标准化技术委员会）归口，主管部门为中国电器工业协会。
本标准将为正确执行GB 311.1-1997《高压输变电设备的绝缘配合》提供指导，以便经济合理地确定三相交流电力系统中输变电设备或成套装置的额定耐受电压、选取相应于设备最高电压Um的标准绝缘水平。和GB 311.1相适应，本标准适用于设备的相对地绝缘、相间绝缘和纵绝缘，并按设备最高压分为两个范围，即范围Ⅰ和范围Ⅱ论述。
　　本标准所提供的基本原则对两相和单相电力系统也是适用的。在导则中强调结合具体工程研究绝缘配合，以合理确定绝缘水平的必要性，这对范围Ⅱ的设备更有意义。

Scope

This standard will provide guidance for the correct implementation of GB 311.1-1997 "Insulation Coordination of High-Voltage Power Transmission and Transformation Equipment", so as to economically and reasonably determine the rated withstand voltage of power transmission and transformation equipment or complete sets of equipment in a three-phase AC power system, select the corresponding The standard insulation level for the highest voltage U_m of the equipment. Compatible with GB 311.1, this standard applies to the phase-to-ground insulation, phase-to-phase insulation and longitudinal insulation of equipment, and is divided into two ranges according to the highest voltage of the equipment, namely scope I and scope II. The basic principles provided in this standard are also applicable to two-phase and single-phase power systems. In the guidelines, it is emphasized that it is necessary to study the insulation coordination in combination with specific projects to reasonably determine the insulation level, which is more meaningful for scope II equipment. Although GB 311.1 adopts IEC 60071-1:1993 "Insulation Coordination Part 1: Definitions, Principles and Rules" as non-equivalent, the overall structure, basic principles, relevant main contents, main considerations of insulation coordination procedures, The standard insulation level is consistent with IEC 60071-2. Therefore, this standard is equivalent to adopting IEC 60071-2: 1996 "Guidelines for the Use of Insulation Coordination Part 2". When compiling, combine our country's experience and practice, try to get close to IEC 60071-2, and widely use the information provided in IEC 60071-2 based on the existing international experience and research results.