本指南适用于三相架空交流输电线路（110 kV至1000 kV）的设计和施工，可作为较低电压水平的参考。本指南规定了架空输电线路导线和地线、绝缘子和配件、绝缘配合、防雷和接地、导线布置以及塔架类型、负载、材料、结构和基础的设计方法。

This guide applies to three-phase overhead ac transmission line (110 kV to 1000 kV) design and construction, and it can be used as reference for lower voltage levels. This guide specifies design methodologies of the overhead transmission line conductors and ground wires, insulators and fittings, insulation coordination, lightning protection and grounding, conductor arrangement, as well as tower types, loads, materials, structure, and foundations.