前言:这是CSA标准CAN/CSA-C1 325的第一版，用于标称负载的架空线路绝缘子 1000V以上的电压.直流系统用陶瓷有机/ass绝缘体单元.定义，试验方法和验收标准，采用了标题相同的CEI/IEC（国际电工委员会）标准1325:1995（第一版，1995-03），但有加拿大的偏差。CSA标准是通过委员会成员和 通过销售标准和自愿捐款提供财政支持。主要资金来源于 加拿大电力公司为本标准的协商一致过程提供了支持 协会（CEA），感谢他们的帮助。CSA复合材料技术委员会对本标准进行了审查，以供加拿大采用 本标准管辖范围内的输电用悬垂绝缘子 并已得到技术委员会的正式批准。A. 这些委员会的成员名单可根据要求提供。本标准已获得批准 作为加拿大标准委员会制定的加拿大国家标准。适用范围:本国际标准适用于d。 c、 标称电压大于1000 V的架空电力线路。不适用于复合绝缘子。本标准适用于直流电压下其他情况下使用的绝缘子将留给相关技术委员会。本标准规定:绝缘子的特性；验证这些特性规定值的条件；可接受的标准。它以类似于IEC 383-1的方式规定了基本特性试验。为确保直流绝缘子具有令人满意的长期性能，必须进行某些附加试验。 目前，这些附加试验仅涉及帽形和针形绝缘子。鉴于缺乏关于直流线路上长棒形绝缘子的重要性能数据，目前无法定义或验证此类绝缘子的特殊直流导向试验。本标准不包括针对特定运行条件（例如，特定运行条件引起的老化）选择绝缘子的要求或特殊试验。本标准还定义了绝缘子特性（机械、电气和尺寸），并规定了验证这些特性的规定值的条件。 注1）本标准不包括人工污染试验或绝缘子组试验。以下IEC出版物介绍了这些主题和一些相关试验方法:IEC 383-2和IEC 1245.2）本标准中的许多要求和试验与直流牵引线上使用的绝缘子有关，但可能需要进行其他试验。可参考IEC 383-1。

Preface:This is the first edition of CSA Standard CAN/CSA-C1 325,Insulators for overhead lines with a nominal voltage above 1 000 V — Ceramic org/ass insulator units for d.c. systems — Definitions, test methods and acceptance criteria, which is an adoption, with Canadian deviations, of the identically titled CEI/IEC (International Electrotechnical Commission) Standard 1 325:1 995 (first edition, 1 995-03).CSA Standards are developed through the dedication of time by Committee members and by financial support through sales of standards and through voluntary contributions. Major funding in support of the consensus process for this Standard was provided by the Canadian Electricity Association (CEA), whose assistance is acknowledged with thanks.This Standard was reviewed for Canadian adoption by the CSA Technical Committee on Composite Suspension Insulators for Transmission Applications under the jurisdiction of the Standards Steering Committee on Electrical Engineering, and has been formally approved by the Technical Committee. A list of the members of these Committees is available upon request. This Standard has been approved as a National Standard of Canada by the Standards Council of Canada.Scope:This International Standard is applicable to string insulator units of ceramic material or glass for use on d.c. overhead power lines with a nominal voltage greater than 1 000 V.It is not applicable to composite insulators.The application of this standard to insulators for use in other situations under d.c. voltage will be left to the relevant technical committees.This Standard specifies:the characteristics of insulators;the conditions under which the specified values of these characteristics shall be verified;acceptable criteria.It specifies basic characteristic tests in a manner similar to that of IEC 383-1. Certain additional tests have been found to be necessary to ensure satisfactory long-term performance of d.c. insulators. At present, these additional tests concern only cap and pin insulators.In view of the lack of significant performance data regarding long rod insulators on d.c. lines, it is not possible at present to define or validate special d.c.-oriented tests for such insulators.This Standard does not include requirements, or special tests, dealing with the choice of insulators for specific operating conditions (e.g. aging arising from specific operating conditions).This Standard also defines the insulator characteristics (mechanical, electrical, and dimensional) and prescribes the conditions under which the specified values of these characteristics are to be verified.NOTES1) This Standard does not include artificial pollution tests or tests on insulator sets. These subjects and some relevant test methods are dealt with in the following IEC Publications: IEC 383-2 and IEC 1245.2) Many of the requirements and tests in this standard are relevant to insulators for use on d.c. traction lines, but other tests may be required. Reference can be made to IEC 383-1.