DL/T 1122-2009 in English

本标准规定了架空输电线路在污秽区、雷电区域、覆冰区域、鸟害区域外绝缘的配置方法。
本标准适用于110(66)kV~750kV交流架空输电线路的外绝缘配置，直流架空输电线路的外绝缘配置可参考采用。本标准不包括线路杆塔塔头的空气间隙的取值和选择，也不涉及海拔或覆冰对外绝缘配置水平的影响。

Scope

This standard specifies the insulation configuration method for overhead transmission lines outside polluted areas, lightning areas, ice-covered areas, and bird-infested areas. This standard is applicable to the external insulation configuration of 110(66)kV-750kV AC overhead transmission lines. The external insulation configuration of DC overhead transmission lines can be adopted as a reference. This standard does not include the value and selection of the air gap at the head of the line pole tower, nor does it involve the impact of altitude or ice coating on the level of external insulation configuration.