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About This Item
Full Description
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.
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.
NOTES
1) 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.