长棒型绝缘子组串的特点

[中文适用范围]： 规定了用于标称电压大于 1 000 V、频率不大于 100 的交流架空线路的带有陶瓷材料绝缘部件的长棒型串绝缘子单元的电气和机械特性以及主要尺寸的规定值赫兹。标准化的最小绝缘子单元的雷电冲击耐受电压为 125 kV。也适用于串绝缘子单元： - 长杆型，两端带有 U 型夹，用于与舌片耦合，或两端带有插座，用于与销球耦合 - 带外部金属配件 - 用于架空线路位于轻度污染地区，表一和表二中给出的爬电距离已相应确定 - 以及变电站中使用的类似设计的绝缘子。本标准可视为直流架空线路绝缘子暂行标准。注 - 有关一般定义和测试方法，请参阅 IEC 383。 - 有关串绝缘子单元的 U 形夹和舌形联轴器的尺寸，请参阅 IEC 471。 - 有关串绝缘子单元的球窝联轴器的尺寸，请参阅 IEC 120。 [外文原描述]： Prescribes specified values for the electrical and mechanical characteristics and for the principal dimensions of string insulator units of the long rod type with insulating parts of ceramic material intended for a.c. overhead lines with a nominal voltage greater than 1 000 V and a frequency not greater than 100 Hz. The smallest insulator unit standardized has a lighting impulse withstand voltage of 125 kV. Applies also to string insulator units: - of the long rod type either with a clevis at both ends for coupling with a tongue, or with a socket at both ends for coupling with a pin ball - with external metal fittings - for use on overhead lines situated in slightly polluted areas, and the creepage distances given in Tables I and II have been established accordingly - and insulators of similar design, used in substations. This standard may be regarded as a provisional standard for insulators for d.c. overhead lines. Note - For general definitions and methods of tests see IEC 383. - For dimensions of clevis and tongue couplings of string insulator units, see IEC 471. - For dimensions of ball and socket couplings of string insulator units, see IEC 120.