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CSA C22.2 NO. 106:05 (R2019) HRC-Miscellaneous Fuses
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National Standard of Canada
(reaffirmed 2019)
REVISED OCTOBER 2019
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Revision History
CSA C22.2 No. 106:05, HRC-Miscellaneous fuses
National Standard of Canada — October 2019 |
Outside front cover, National Standard of Canada text, and title page. 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. |
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CSA C22.2 No. 106:05
December 2005
Title: HRC-Miscellaneous fuses
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National Standard of Canada
CSA C22.2 No. 106:05
HRC-Miscellaneous fuses
®A trademark of the Canadian Standards Association, operating as “CSA Group”
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ICS 29.120.50
ISBN 1-55397-653-3
© 2005 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.
© Canadian Standards Association HRC-Miscellaneous fuses
Technical Committee on Industrial Products v
Subcommittee on C22.2 No. 106 vi
Preface vii
Foreword viii
Scope 1
Reference publications 1
Definitions 1
General requirements 2
Construction 2
General 2
Characteristics 4
General 4
HRCI-MISC fuses 4
HRCII-MISC fuses 4
Markings 4
Tests 5
General 5
Verification of temperature rise and current-carrying capacity 7
Arrangement of fuses 7
Test circuit characteristics 7
Test method 8
Acceptability of test results 9
Verification of overload operation 9
Arrangement of fuses 9
Test circuit characteristics 9
Test method 9
Acceptability of test results 10
Verification of operation at rated voltage 10
Arrangement of fuses 10
Test circuit characteristics 11
Test method 11
Acceptability of test results 12
Verification of peak let-through current and clearing I2t characteristics 12
Measurement 12
Test method 12
Acceptability of test results 12
Annexes
A (informative) — Verification of the test set-up 14
December 2005 iii
C22.2 No. 106-05 © Canadian Standards Association
Tables
— Summary of tests 6
— Minimum number of samples for testing to be supplied by the manufacturer 6
— Minimum number of samples to be tested for each test 6
— Temperature test connections for fuses rated 0 to 600 A 7
— Maximum bus bar cross-section and dummy fuse temperature rise 8
— Verification of overload operation 10
— Verification of operation at rated voltage 11
— Maximum peak let-through current (Ip) and maximum clearing I2t for available current of 200 kA rms symmetrical HRCI-MISC fuses 13
— Maximum peak let-through current (Ip) and maximum clearing I2t for available current of 200 kA rms symmetrical HRCII-MISC fuses 13
Figures
1 — Aging time versus aging temperature for paper tubes 3
iv December 2005
© Canadian Standards Association HRC-Miscellaneous fuses
K. Powell Criterions,
Glen Williams, Ontario
Representing Manufacturers
Chair
Paulsen Province of New Brunswick, Fredericton, New Brunswick Representing Regulatory Authorities
Vice-Chair
Pope CSA,
Mississauga, Ontario
Project Manager
Representing Regulatory Authorities
D.R.A. MacLeod Nova Scotia Department of Environment and
Labour,
Halifax, Nova Scotia
T. Olechna Electrical Safety Authority, Mississauga, Ontario
A. Tsisserev City of Vancouver, Vancouver, British Columbia
Representing Manufacturers
R.M. Bartholomew Electric Power Equipment (1986) Ltd.,
Vancouver, British Columbia
W.K. Jones Cutler-Hammer Canada Inc., Burlington, Ontario
M. Smith Rockwell Automation Canada Inc., Cambridge, Ontario
Representing General Interests
M. Kasumovich Mississauga, Ontario
D.G. Morlidge Fluor Canada Ltd., Calgary, Alberta
R. Roberton Shell Canada Limited, Calgary, Alberta
December 2005 v
C22.2 No. 106-05 © Canadian Standards Association
C. Thwaites Ferraz Shawmut Canada Inc., Toronto, Ontario
Chair
M. Bird Fusetek, Kingston, Ontario
T. Flood A.J. Flood and Associates, Burlington, Ontario
D.B. Giblin Cooper Bussmann, Inc., St. Louis, Missouri, USA
D. Heron Electrical Safety Authority, Worthington, Ontario
S. Kimura San-O Industrial Corporation, Holbrook, New York, USA
Associate
F.G. Ladonne Underwriters Laboratories Inc.,
Northbrook, Illinois, USA
Associate
R. MacKenzie CSA,
Toronto, Ontario
Associate
R. McBrien Bel Fuse Inc.,
Baiting Hollow, New York, USA
G. Montminy Régie du bâtiment du Québec,
Québec, Québec
E. Rawlings Edison Fusegear Canada, Mississauga, Ontario
Associate
W. Travis Littlefuse, Inc.,
Des Plaines, Illinois, USA
M. Henville CSA,
Mississauga, Ontario
Project Manager
vi December 2005
© Canadian Standards Association HRC-Miscellaneous fuses
This is the fifth edition of CSA C22.2 No. 106, HRC-Miscellaneous fuses, one of a series of Standards issued under Part II of the Canadian Electrical Code. It supersedes the previous editions published in 1992, 1990, 1985, and 1953 under the title HRC Fuses.
This Standard specifies requirements for HRCI-MISC and HRCII-MISC fuses.
For general information on the Standards of the Canadian Electrical Code, Part II, see the Preface of CAN/CSA-C22.2 No. 0.
This Standard was prepared by the Subcommittee on C22.2 No. 106, under the jurisdiction of the Technical Committee on Industrial Products and the Strategic Steering Committee on Requirements for Electrical Safety, and has been formally approved by the Technical Committee. It will be submitted to the Standards Council of Canada for approval as a National Standard of Canada.
Interpretations: The Strategic Steering Committee on Requirements for Electrical Safety has provided the following direction for the interpretation of standards under its jurisdiction: “The literal text shall be used in judging compliance of products with the safety requirements of this Standard. When the literal text cannot be applied to the product, such as for new materials or construction, and when a relevant committee interpretation has not already been published, CSA’s procedures for interpretation shall be followed to determine the intended safety principle.”
December 2005
Notes:
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December 2005 vii
C22.2 No. 106-05 © Canadian Standards Association
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Products in substantial accord with this Standard but which exhibit a minor difference or a new feature may be deemed to meet the Standard providing the feature or difference is found acceptable utilizing appropriate CSA International Operating Procedures. Products that comply with this Standard shall not be certified if they are found to have additional features which are inconsistent with the intent of this Standard. Products shall not be certifiable if they are discovered to contravene applicable laws or regulations.
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viii December 2005
© Canadian Standards Association HRC-Miscellaneous fuses
C22.2 No. 106-05
Scope
This Standard applies to HRC non-renewable cartridge current-limiting fuses of the HRCI-MISC (Form I) type rated 600 A or less and 600 V ac or less, and to HRC non-renewable cartridge current-limiting fuses of the HRCII-MISC (Form II) type rated 1200 A or less and 600 V ac or less, that are intended to be used in accordance with the Canadian Electrical Code, Part I.
Reference publications
This Standard refers to the following publications, and where such reference is made, it shall be to the edition listed below, including all amendments published thereto.
CSA (Canadian Standards Association)
C22.1-02
Canadian Electrical Code, Part I
CAN/CSA-C22.2 No. 0-M91 (R2001)
General requirements — Canadian Electrical Code, Part II
CAN/CSA-C22.2 No. 248 series of Standards: CAN/CSA-C22.2 No. 248.1-00
Low-voltage fuses — Part 1: General requirements
Definitions
The following definitions apply in this Standard:
Arcing time — the time from the instant the fuse element or link has melted and arcing is initiated until final circuit interruption by the fuse.
Clearing time — the time from the beginning of an overcurrent to the final circuit interruption. The clearing time is equal to the sum of the melting time and the arcing time.
Current-limiting fuse — a fuse that, within a specified overcurrent range, limits the clearing time at rated voltage to an interval equal to or less than the first major or symmetrical current loop duration, and limits the peak current to a value less than the available peak current.
Current-limiting range — the range of prospective currents from the threshold current to the interrupting current rating of a current-limiting fuse.
Current rating (In) — the nominal root-mean-square (rms) ac or dc ampere rating, based on specified conditions, that is assigned to a fuse.
Dummy — a copper bar of specified dimensions used to calibrate equipment for temperature testing HRCII-MISC fuses.
HRC (high-rupturing capacity) fuse — a fuse with an interrupting rating of at least 100 kA rms symmetrical.
December 2005 1