CSA Group CSA C802.1:23 National Standard of Canada Minimum efficiency values for liquid-filled distribution transformers

Preface

This is the third edition of CSA C802.1, Minimum efficiency values for liquid-filled distribution transformers. It supersedes the previous editions published in 2013 and 2000.

Major changes to this edition include the following:

a) The minimum individual values of efficiency in Table 1 have been calculated to reflect the minimum average values required by 10 CFR 431 efficiency values.

b) A range of impedance has been added to Table 1.

c) An explanation as to how harmonization has been achieved is given in Annex A.

CSA Group acknowledges that the development of this Standard was made possible, in part, by the financial support of BC Hydro, Hydro Québec, Electricity Canada, Fortis BC Electric, and Natural Resources Canada.

This Standard is considered suitable for use for conformity assessment within the stated scope of the standard.

This Standard was prepared by the Subcommittee on Liquid-Filled Distribution Transformer Efficiency, under the jurisdiction of the Technical Committee on Industrial Equipment and the Strategic Steering Committee on Performance, Energy Efficiency, and Renewables, and has been formally approved by the Technical Committee.

This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group.

Notes:

1) Use of the singular does not exclude the plural (and vice versa) when the sense allows.

2) Although the intended primary application of this Standard is stated in its Scope, it is important to note that it remains the responsibility of the users of the Standard to judge its suitability for their particular purpose.

3) This Standard was developed by consensus, which is defined by CSA Policy governing standardization — Code of good practice for standardization as “substantial agreement. Consensus implies much more than a simple majority, but not necessarily unanimity”. It is consistent with this definition that a member may be included in the Technical Committee list and yet not be in full agreement with all clauses of this Standard.

4) To submit a request for interpretation of this Standard, please send the following information to [email protected] and include “Request for interpretation” in the subject line:

a) define the problem, making reference to the specific clause, and, where appropriate, include an illustrative sketch;

b) provide an explanation of circumstances surrounding the actual field condition; and

c) where possible, phrase the request in such a way that a specific “yes” or “no” answer will address the

issue.

Committee interpretations are processed in accordance with the CSA Directives and guidelines governing

standardization and are available on the Current Standards Activities page at

standardsactivities.csagroup.org.

5) This Standard is subject to review within five years from the date of publication. Suggestions for its

improvement will be referred to the appropriate committee. To submit a proposal for change, please send the

following information to [email protected] and include “Proposal for change” in the subject line:

1. a) Standard designation (number);
2. b) relevant clause, table, and/or figure number;
3. c) wording of the proposed change; and
4. d) rationale for the change.