CSA C310:21

National Standard of Canada

Distribution class polymeric cutouts

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  CSA C310:21

  August 2021

  
  

  Title: Distribution class polymeric cutouts

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National Standard of Canada

CSA C310:21

Distribution class polymeric cutouts

®A trademark of the Canadian Standards Association, operating as “CSA Group”

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ICS 29.120.50

ISBN 978-1-4883-3914-1

© 2021 Canadian Standards Association

All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher.

Contents

Technical Committee on Distribution Class Polymeric Cutouts 3

Preface 5

1. Scope 6

   
   

2. Reference publications 6

   
   

3. Definitions 8

   
   

4. General 9

   1. Basic cutout requirements 9

   2. Service conditions and environment 9

   3. Fuse support 9

   4. Fuse holder and solid blades 9

   5. Quality assurance 10

      
      

5. Mechanical characteristics 10

   1. Terminals 10

   2. Upper fuse holder support 10

   3. Lower hinge 10

   4. Interchangeability 10

   5. Insulator to fittings interface 11

   6. Closing-in force 11

   7. Galvanized parts 11

      
      

6. Electrical characteristics 11

   1. Electrical ratings 11

   2. Performance characteristics 11

      
      

7. Design tests 11

   1. General 11

   2. Water penetration test 11

      1. Samples 11

      2. Procedure 12

      3. Acceptance criteria 12

   3. Water diffusion test 13

      1. General 13

      2. Samples 13

      3. Pre-stressing 13

      4. Applied voltage 13

      5. Acceptance criteria 13

   4. Thermal cycle, manual operation, and torque test 14

      1. Samples 14

      2. Procedure 14

      3. Acceptance criteria 14

   5. Accelerated weathering test 15

   6. Tracking and erosion test 15

      1. Samples 15

      2. Test transformer 15

      3. Procedure 15

      4. Acceptance criteria 16

   7. Flammability test 16

   8. Closing-in test 16

1. Radio-influence tests 17

2. Short-time current tests for disconnecting cutouts 17

3. Temperature rise test 18

1. Sample Tests 18

   1. General 18

   2. Visual observation and galvanization 18

   3. Power frequency voltage 18

   4. Eccentricity 18

      
      

2. Routine tests 18

   1. General 18

   2. Visual inspection 19

   3. Positive engagement 19

      
      

3. Test report 19

   
   

4. Marking and product identification 19

   
   

5. Packaging 19

   
   

6. Optional items 20

Annex A (informative) — Commentary on CSA C310 26 Annex B (normative) — Tracking wheel No. 1 28 Annex C (normative) — Tracking wheel No. 2 30

Annex D (informative) — Sample design and type test report 32

Technical Committee on Distribution Class Polymeric Cutouts

D. A. Laking Consultant,

Truro, Nova Scotia, Canada

Category: General Interest

Chair

A. Balasoiu Hydro-Québec, Distribution, Montréal, Quebec, Canada Category: User Interest

S. Bell K-Line Insulators Ltd., Toronto, Ontario, Canada

Non-voting

A. J. Carreira K-Line Insulators Limited, Scarborough, Ontario, Canada Category: Producer Interest

1. Haynes ABB Inc.,

   Mebane, North Carolina, USA

   Category: Producer Interest

   
   

2. Jala S&C Electric Company, Chicago, Illinois, USA Category: Producer Interest

P. G. Krotky Oakley Engineering, Mississauga, Ontario, Canada Category: General Interest

1. Loudon EMC Pacific Pte. Ltd.,

   Qualicum Beach, British Columbia, Canada

   Category: Producer Interest

   
   

2. A. Marra K-Line Insulators Ltd., Toronto, Ontario, Canada

Non-voting

1. Navis FortisAlberta,

   Airdrie, Alberta, Canada

   Category: User Interest

   
   

2. L. Oganezov ABB Inc. Division EPMV,

St-Laurent, Quebec, Canada

Non-voting

D. R. Orr Manitoba Hydro,

Winnipeg, Manitoba, Canada

Category: User Interest

G. Ringham BC Hydro,

Burnaby, British Columbia, Canada

Category: User Interest

1. St. Onge SaskPower,

   Regina, Saskatchewan, Canada

   Category: User Interest

   
   

2. H. Wiebe Innovative Solutions Engineering Inc., Winnipeg, Manitoba, Canada Category: General Interest

C. E. Worthington Hubbell Power Systems,

Leeds, Alabama, USA

Category: Producer Interest

M. Wyndham Hydro Ottawa Limited, Ottawa, Ontario, Canada Category: User Interest

A. Yerges Eaton,

Franksville, Wisconsin, USA

Category: Producer Interest

U. Edelman CSA Group,

Toronto, Ontario, Canada

Project Manager

Preface

This is the second edition of CSA C310, Distribution class polymeric cutouts. It supersedes the previous edition published in 2009.

This Standard addresses the electrical and mechanical characteristics of cutouts made from polymeric materials. Annex A contains commentary on some of the clauses of this Standard.

Funding in support of the consensus process of this Standard was provided by the following funders, whose assistance is acknowledged with thanks: Canadian Electricity Association (CEA), Schneider Electric Canada Inc., IFD Corporation, Hydro Quebec, S&C Electric Canada Ltd., Fortis Alberta, Fortis BC, Maritime Electric, Newfoundland Hydro, Newfoundland Power, EPCOR, Utilities Standards Forum (USF), Alectra Utilities, and Hydro One.

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

This Standard was prepared by the Technical Committee on Distribution Class Polymeric Cutouts under the jurisdiction of the Strategic Steering Committee on Power Engineering and Electromagnetic Compatibility, 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.

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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 inquiries@csagroup.org and include “Proposal for change” in the subject line:

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   2. relevant clause, table, and/or figure number;

   3. wording of the proposed change; and

   4. rationale for the change.

CSA C310:21

Distribution class polymeric cutouts

1. Scope

   
   

   1.1

   This Standard applies to open-type (fused and solid-blade) cutouts with a polymeric insulator structure component. These cutouts are intended for operation on alternating current distribution systems.

   
   

   1.2

   In some cases, specific types of construction are envisaged. This does not preclude the use of other types of construction, provided that the engineering representatives involved can demonstrate the safety and suitability of these alternatives.

   
   

   1.3

   In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the Standard.

   Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

   
   

   Notes to tables and figures are considered part of the table or figure and may be written as requirements.

   
   

   Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.

   
   

   1.4

   The values given in SI units are the units of record for the purposes of this Standard. The values given in parentheses are for information and comparison only.

   
   

2. Reference publications

This Standard refers to the following publications, and where such reference is made, it shall be to the edition listed below.

CSA Group

C57-16

Electric power connectors for use in overhead line conductors

C411.1-16 (R2021)

AC suspension insulators