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CSA C310-21 Distribution class polymeric cutouts
standard by CSA Group, 08/01/2021
Preface
This is the second edition of CSA C310, Distribution class polymeric cutouts. 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, SC 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 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.
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.
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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
®A trademark of the Canadian Standards Association, operating as “CSA Group”
Published in August 2021 by 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.
Technical Committee on Distribution Class Polymeric Cutouts 3
Preface 5
Scope 6
Reference publications 6
Definitions 8
General 9
Basic cutout requirements 9
Service conditions and environment 9
Fuse support 9
Fuse holder and solid blades 9
Quality assurance 10
Mechanical characteristics 10
Terminals 10
Upper fuse holder support 10
Lower hinge 10
Interchangeability 10
Insulator to fittings interface 11
Closing-in force 11
Galvanized parts 11
Electrical characteristics 11
Electrical ratings 11
Performance characteristics 11
Design tests 11
General 11
Water penetration test 11
Samples 11
Procedure 12
Acceptance criteria 12
Water diffusion test 13
General 13
Samples 13
Pre-stressing 13
Applied voltage 13
Acceptance criteria 13
Thermal cycle, manual operation, and torque test 14
Samples 14
Procedure 14
Acceptance criteria 14
Accelerated weathering test 15
Tracking and erosion test 15
Samples 15
Test transformer 15
Procedure 15
Acceptance criteria 16
Flammability test 16
Closing-in test 16
8 | Type tests 16 | |
8.1 | General 16 | |
8.2 | Dielectric tests | 17 |
8.3 | Interrupting tests | 17 |
Radio-influence tests 17
Short-time current tests for disconnecting cutouts 17
Temperature rise test 18
Sample Tests 18
General 18
Visual observation and galvanization 18
Power frequency voltage 18
Eccentricity 18
Routine tests 18
General 18
Visual inspection 19
Positive engagement 19
Test report 19
Marking and product identification 19
Packaging 19
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
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
Haynes ABB Inc.,
Mebane, North Carolina, USA
Category: Producer Interest
Jala S&C Electric Company, Chicago, Illinois, USA Category: Producer Interest
P. G. Krotky Oakley Engineering, Mississauga, Ontario, Canada Category: General Interest
Loudon EMC Pacific Pte. Ltd.,
Qualicum Beach, British Columbia, Canada
Category: Producer Interest
A. Marra K-Line Insulators Ltd., Toronto, Ontario, Canada
Non-voting
Navis FortisAlberta,
Airdrie, Alberta, Canada
Category: User Interest
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
St. Onge SaskPower,
Regina, Saskatchewan, Canada
Category: User Interest
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
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:
Use of the singular does not exclude the plural (and vice versa) when the sense allows.
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.
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.
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CSA C310:21
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.
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