1.1 本规范涵盖用作架空电导体的钢芯钢绞线（ACSR/SD）及其组件电线（说明 注释1和 2. ). 1.2 以英寸磅或国际单位制表示的数值应单独视为标准值。每个系统应独立使用。组合两个系统的值可能导致不符合规范。对于AWG或kcmil指定的导体尺寸，SI单位的要求已从以英寸-磅单位表示或导出的相应值进行了数字转换。对于仅由SI单位指定的导体尺寸，要求以SI单位表示或导出。 1.2.1 对于密度、电阻率和温度，以SI单位表示的值应视为标准值。 注1: ACSR/SD设计用于通过积分阻尼控制风振。 导体由一根或多根圆形钢丝的中心芯组成，这些钢丝被两层梯形铝1350-H19线或两层梯形铝制1350-H119线和一层圆形铝1350-H1 9线包围( 图1 ). 梯形导线层通过提供导体自阻尼特性的两个小环形间隙彼此隔开并与钢芯隔开。圆形铝线在其自身和下面的梯形线层之间紧密层接触。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 和 表2 ). 图1 典型ACSR/SD绞合线图解 注2: 铝和回火名称符合ANSI标准H 35.1.根据惯例，铝1350符合UNS A91350 第527页 . 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 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 concentric-lay-stranded self-damping aluminum conductor, steel-reinforced (ACSR/SD), and its component wires for use as overhead electrical conductors (Explanatory Notes 1 and 2 ). 1.2 The values stated in inch-pound or SI units are to be regarded separately as standard. Each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the specification. For conductor sizes designated by AWG or kcmil, the requirements in SI units have been numerically converted from corresponding values stated or derived in inch-pound units. For conductor sizes designated by SI units only, the requirements are stated or derived in SI units. 1.2.1 For density, resistivity, and temperature, the values stated in SI units are to be regarded as standard. Note 1: ACSR/SD is designed to control aeolian vibration by integral damping. The conductors consist of a central core of a round steel wire or wires surrounded by two layers of trapezoidal aluminum 1350-H19 wires or two layers of trapezoidal aluminum 1350-H19 wires and one layer of round aluminum 1350-H19 wires ( Fig. 1 ). The trapezoidal-wire layers are separated from each other and from the steel core by two small annular gaps that provide the conductors self-damping characteristics. The round aluminum wires are in tight layer contact between themselves and the underlying trapezoidal wire layer. 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 and Table 2 ). FIG. 1 Illustrations of Typical ACSR/SD Strandings Note 2: The aluminum and temper designations conform to ANSI Standard H 35.1. Aluminum 1350 corresponds to UNS A91350 in accordance with Practice E527 . 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 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.