标称电压高于1000V的架空线路用绝缘子.交流系统用陶瓷绝缘子.长杆型绝缘子元件的特性

[中文适用范围]： 本标准适用于标称电压大于1000V、频率不超过100Hz的交流架空电力线路中使用的长棒形陶瓷绝缘子单元。也适用于变电站中使用的类似设计的绝缘子。 本标准适用于两端带有用于与舌片连接的叉形端配件或两端带有用于与球头连接的球窝端配件的长棒形陶瓷绝缘子单元。 本文件的目的是规定长棒形陶瓷绝缘子单元的电学和机械特性以及主要尺寸的指定值。 本标准适用于位于轻度污染区域的架空线路使用的绝缘子单元，表1中给出的爬电距离是根据IEC TS 60815-2对SPS类推荐的27.8 mm/kV建立的。然而，较短的爬电距离适用于某些非污染区域。如果特定的操作条件需要或允许非标准（更长或更短）爬电距离，除非需要特别长的爬电距离导致L值大于表1中给出的值，否则应使用本文件的机械特性以及长度L（见第4条）。在特殊要求的情况下，例如非常严重的污染区域和其他特定或极端环境条件，可能需要更改某些尺寸。 在合理适用的范围内，本文件也可适用于本标准范围之外的类似绝缘子单元，如电气牵引线路的绝缘子。本文件不包括绝缘子的测试和端配件尺寸。 球窝连接由IEC 60120涵盖，叉形和舌片连接由IEC 60471涵盖。 注1：关于现场污染严重程度的定义，请参见IEC TS 60815的适用部分。 注2：本文件中使用的术语“陶瓷”指瓷材料，与北美惯例相反，不包括玻璃。 [外文原描述]： IEC 60433:2021 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC 60433:2021 is applicable to string insulator units of the long rod type with insulating parts of ceramic material intended for use in AC overhead power lines with a nominal voltage greater than 1000 V and a frequency not greater than 100 Hz. It is also applicable to insulators of similar design, used in substations. This document is applicable to ceramic string insulator units of the long rod type, either with a clevis end fitting at both ends for coupling with a tongue, or with a socket end fitting at both ends for coupling with a pin ball. The object of this document is to prescribe specified values for electrical and mechanical characteristics, and for the principal dimensions of ceramic string insulator units of the long rod type. This fourth edition cancels and replaces the third edition published in 1998. This edition includes the following significant technical changes with respect to the previous edition: - wording in Scope changed from "should" to "are intended to"; - new normative references added; - title of Clause 4 amended, new Note 4 added; - Table 1 expanded to include more specified mechanical failing loads.