1.1 本规范涵盖用作架空电导体的钢芯钢绞线（ACSR/TW）及其组件电线（说明 注1 和 注2 ). 1.2 以英寸-磅单位表示的值应视为标准值。括号中给出的值是对SI单位的数学转换，仅供参考，不被视为标准值。 注1: ACSR/TW设计用于通过使用梯形导线（TW）增加给定直径导线的铝面积。导体由两层或多层梯形铝1350-H19导线围绕的圆形钢丝的中心芯组成。相同尺寸导体的不同绞合线按类型标识，这是钢面积与铝面积的近似比率，以百分比表示( 表1 , 表2 和 表3 ). 在本规范中 表1 和 表2 基于面积或外径等于标准ACSR的特定尺寸的成品导体制成表格，以便于导体选择。 注2: 铝和回火名称符合ANSI标准H 35.1.根据惯例，铝1350符合统一编号系统（UNS）A91350 第527页 . 1.3 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。

1.1 This specification covers shaped wire compact concentric-lay-stranded aluminum conductor, steel-reinforced (ACSR/TW) and its component wires for use as overhead electrical conductors (Explanatory Note 1 and Note 2 ). 1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. Note 1: ACSR/TW is designed to increase the aluminum area for a given diameter of conductor by the use of trapezoidally shaped wires (TW). The conductors consist of a central core of round steel wire(s) surrounded by two or more layers of trapezoidal aluminum 1350-H19 wires. Different strandings of the same size of conductor are identified by type, which is the approximate ratio of steel area to aluminum area expressed in percent ( Table 1 , Table 2 and Table 3 ). For the purpose of this specification, the sizes listed in Table 1 and Table 2 are tabulated on the basis of the finished conductor having an area or outside diameter equal to that of specific sizes of standard ACSR so as to facilitate conductor selection. Note 2: The aluminum and temper designations conform to ANSI Standard H 35.1. Aluminum 1350 corresponds to Unified Numbering System (UNS) A91350 in accordance with Practice E527 . 1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.