UL 489-2016 UL Standard for Safety Molded-Case Circuit Breakers Molded-Case Switches and Circuit-Breaker Enclosures (Thirteenth Edition).pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 489 Molded-Case Circuit Breakers, Molded-Case Switches and Circuit-Breaker Enclosures STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHO

2、UT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Molded-Case Circuit Breakers, Molded-Case Switches and Circuit-Breaker Enclosures, UL 489 Thirteenth Edition, Dated October 24, 2016 SUMMARY OF T

3、OPICS This new edition of ANSI/UL 489 incorporates the following: Revision to Requirements for the Calibration Testing for DC Circuit Breakers Addition of References to Supplements SA through SG Clarication of Requirements for Interchangeable Trip Units Addition of Three-Pole Tests to Table 7.5.4 Re

4、vision of Requirements for the Temperature Measurement in Clause 7.1.4.1.11 Revisions to Address DC Rated Circuit Breakers Revision of HACR Marking to be Optional Addition of Calibration for Circuit Breakers Employing AFCI, GFCI, and Equipment Ground Fault Protection (EGFP) Motor Protection Circuit

5、Breakers Clarication on the Use of 3-Pole Breakers for Use in Single-Phase Circuits and Wye Systems Circuit Breakers with Dependent Manual Operation Clarication to Insure Testing of the 15A Rated Circuit Breaker Degree Sign Marking Requirement for Wire Type Addition of Requirements for Thermal Memor

6、y Editorial Corrections Revised Requirements for the Strain Relief Test Revision of Requirements to Reect the Use of Alternate Thermocouple Material Revision of Requirements to Expand the Ratings of Devices Covered by the Scope of UL 489 Revision to Supplement SC to Expand the Voltage and to Better

7、Address Power Supplies The new and revised requirements are substantially in accordance with Proposal(s) on this subject dated November 13, 2015 and May 27, 2016. OCTOBER 24, 2016 UL 489 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL All

8、 rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of UL. UL provides this Standard as is without warranty of any kind, either ex

9、pressed or implied, including but not limited to, the implied warranties of merchantability or tness for any purpose. In no event will UL be liable for any special, incidental, consequential, indirect or similar damages, including loss of prots, lost savings, loss of data, or any other damages arisi

10、ng out of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the

11、 electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic

12、Standard on the purchasers computer system. OCTOBER 24, 2016 UL 489 tr2UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Association of Standardization and Certication NMX-J-266-ANCE-2016 Fifth Edition CSA Group CSA C22.2 No. 5-16 Fourth Editi

13、on Underwriters Laboratories Inc. UL 489 Thirteenth Edition Molded-Case Circuit Breakers, Molded-Case Switches, and Circuit-Breaker Enclosures October 24, 2016 ANSI/UL 489-2016UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Commitment for Am

14、endments This standard is issued jointly by the Association of Standardization and Certication (ANCE), the Canadian Standards Association (operating as CSA Group), and Underwriters Laboratories Inc. (UL). Comments or proposals for revisions on any part of the standard may be submitted to ANCE, CSA G

15、roup, or UL at any time. Revisions to this standard will be made only after processing according to the standards development procedures of ANCE, CSA Group, and UL. CSA Group and UL will issue revisions to this standard by means of a new edition or revised or additional pages bearing their date of i

16、ssue. ANCE will incorporate the same revisions into a new edition of the standard bearing the same date of issue as the CSA Group and UL pages. Copyright 2016 ANCE Rights reserved in favor of ANCE. ISBN 978-1-4883-0242-8 2016 CSA Group All rights reserved. No part of this publication may be reproduc

17、ed in any form whatsoever without the prior permission of the publisher. This Standard is subject to review ve years from the date of publication, and suggestions for its improvement will be referred to the appropriate committee. To submit a proposal for change, please send the following information

18、 to inquirescsagroup.org and include Proposal for change in the subject line: Standard designation (number); relevant clause, table, and/or gure number; wording of the proposed change; and rationale for the change. To purchase CSA Group Standards and related publications, visit CSA Groups Online Sto

19、re at shop.csa.ca or call toll-free 1-800-463-6727 or 416-747-4044. To purchase CSA Group Standards and related publications, visit CSA Groups Online Store at shop.csa.ca or call toll-free 1-800-463-6727 or 416-747-4044. Copyright 2016 Underwriters Laboratories Inc. ULs Standards for Safety are copy

20、righted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. This ANSI/UL Standard for Safety consists of the Thirteenth E

21、dition. The most recent designation of ANSI/UL 489 as an American National Standard (ANSI) occurred on October 24, 2016. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page (front and back), or the Preface. The Department of Defense (DoD) has adopted UL 489 on

22、 January 18, 1985. The publication of revised pages or a new edition of this Standard will not invalidate the DoD adoption. NEMA (National Electrical Manufacturers Association) has adopted UL 489 (US Requirements) on August 11, 1999 as NEMA Standard AB1. The publication of revised pages or a new edi

23、tion of this Standard will not invalidate the NEMA adoption. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. To purchas

24、e UL Standards, visit Comm 2000 at http:/m- help/how_to_order.aspx or call toll-free 1-888-853-3503.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS PREFACE . 14 INTRODUCTION 1 Scope 16 2 Denitions 16 3 Components 23 4 Units of Measu

25、rement 23 5 Reference Publications .23 MOLDED CASE CIRCUIT BREAKERS 6 Construction .24 6.1 All types 24 6.1.1 General 24 6.1.2 Corrosion Protection 25 6.1.3 Cases Insulating Material 25 6.1.4 Current-Carrying Parts .25 6.1.5 Operating Mechanism .31 6.1.6 Spacings .33 6.2 Current-limiting circuit bre

26、akers .39 6.3 Instantaneous-trip circuit breakers .39 6.4 Circuit breaker and ground-fault circuit-interrupters 39 6.4.1 General 39 6.4.2 Supervisory Circuit 39 6.5 Circuit breakers with equipment ground-fault protection 40 6.6 Integrally fused circuit breakers, high-fault protectors, and high-fault

27、 modules .40 6.7 Adjustable circuit breakers 41 6.8 Heating, air conditioning, and refrigeration (HACR) circuit breakers 42 6.9 Remotely-operated circuit breakers 42 6.10 Switching duty (SWD) rated circuit breakers .42 6.11 400 Hz rated circuit breakers 42 6.12 Draw-out circuit breakers 42 6.13 Seri

28、es-connected circuit breakers 43 6.14 Interchangeable-trip circuit breakers 43 6.15 High-intensity-discharge (HID) type circuit breakers .43 6.16 Circuit breakers for use with 16 or 18 AWG wire .44 6.17 4-pole circuit breakers 44 6.18 Circuit breakers and surge protective devices 44 6.19 Special pur

29、pose not for general use circuit breakers 44 6.20 Circuit breakers with electronic trip units 44 7 Tests .44 7.1 Standard circuit breakers .44 7.1.1 General 44 7.1.2 Calibration Tests 51 7.1.3 Overload Test 54 7.1.4 Temperature Test .58 7.1.5 Endurance Test .66 7.1.6 Calibration Test .69 7.1.7 Inter

30、rupting Test 69 OCTOBER 24, 2016 NMX-J-266-ANCE-2016 CSA C22.2 NO. 5-16 UL 489 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 7.1.8 Trip-out at 200 Percent Current Test 78 7.1.9 Dielectric Voltage-Withstand Test .78 7.1.10 Miscellaneous Te

31、sts .79 7.1.11 High Available Fault Current Test Sequence 80 7.2 Current-limiting circuit breakers .87 7.2.1 General 87 7.2.2 Calibration test .88 7.2.3 Interrupting and Let-Through Measurement Test 88 7.2.4 Trip-Out Test .93 7.2.5 Dielectric Voltage-Withstand test 93 7.2.6 Interpretation of Results

32、 .93 7.3 Instantaneous-trip circuit breakers .93 7.3.1 General 93 7.4 Circuit breaker and ground-fault circuit-interrupters 95 7.4.1 General 95 7.4.2 Circuit Breaker Test Sequences 95 7.4.3 High Available Fault-Current Circuits .100 7.4.4 Ground-Fault Circuit-Interrupter Tests 101 7.5 Circuit breake

33、rs with equipment ground-fault protection .104 7.5.1 General .104 7.5.2 Circuit Breaker Test Sequences .104 7.5.3 High Available Fault Current Circuits Tests .110 7.5.4 Ground Fault Protection Tests .111 7.6 Integrally fused circuit breakers, high-fault protectors, and high-fault modules 111 7.7 Adj

34、ustable circuit breakers .114 7.7.1 General .114 7.7.2 Adjustable Current Setting (I r ) .114 7.7.3 Short-Time Delay 115 7.7.4 Instantaneous Pick-Up Setting .115 7.7.5 Ground-Fault Trip Response 115 7.8 Heating, air conditioning, and refrigeration (HACR) circuit breakers .116 7.9 Remotely-operated c

35、ircuit breakers .116 7.10 Switching duty (SWD) rated circuit breakers 116 7.11 400 Hz rated circuit breakers .117 7.12 Draw-out circuit breakers .117 7.12.1 Electrical Continuity Test 117 7.12.2 Dielectric Voltage-Withstand Test .118 7.13 Series-connected circuit breakers .118 7.13.1 General .118 7.

36、13.2 Selection of Test Samples .118 7.13.3 Test Procedure .120 7.13.4 Closing Test .123 7.13.5 Interrupting Test 124 7.13.6 Intermediate Interrupting Test 124 7.13.7 Trip-Out Test .125 7.13.8 Other functionality calibration test .125 7.13.9 Dielectric Voltage-Withstand Test .125 7.13.10 Interpretati

37、on of Test Results .125 7.14 Interchangeable-trip circuit breakers .126 7.15 High-intensity-discharge (HID) type circuit breakers .126 7.16 Circuit breakers for use with 16 or 18 AWG wire 127 7.16.1 General .127 7.16.2 Circuit Breaker Test Sequences 127 OCTOBER 24, 2016 NMX-J-266-ANCE-2016 CSA C22.2

38、 NO. 5-16 UL 489 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 7.16.3 High Available Fault Current Test Sequence .128 7.16.4 Thermal Withstand Sequence 128 7.17 4-pole circuit breakers .128 7.18 Joints with insulators 128 7.19 Circuit bre

39、akers and surge protective devices .129 7.20 Special purpose not for general use circuit breakers .129 8 Ratings 129 9 Markings .130 9.1 General .130 9.1.1 Details 131 9.1.2 Terminations 136 9.1.3 Interrupting Ratings 138 9.1.4 Special Markings 138 9.2 Current-limiting circuit breakers 139 9.3 Insta

40、ntaneous-trip circuit breakers 139 9.4 Circuit breaker and ground-fault circuit-interrupters .139 9.5 Circuit breakers with equipment ground-fault protection .140 9.6 Integrally fused circuit breakers and high fault protectors 141 9.7 Adjustable circuit breakers .141 9.8 Heating, air conditioning, a

41、nd refrigeration (HACR) circuit breakers .142 9.9 Remotely-operated circuit breakers .142 9.10 Switching duty (SWD) rated circuit breakers 142 9.11 400 Hz rated circuit breakers .142 9.12 Draw-out circuit breakers .142 9.13 Series-connected circuit breakers .142 9.14 Interchangeable-trip circuit bre

42、akers .143 9.15 High-intensity-discharge (HID) type circuit breakers .143 9.16 Rating plugs 144 9.17 Circuit breakers for use with 16 or 18 AWG wire 144 9.18 4-pole circuit breakers .144 MOLDED CASE SWITCHES 10 Construction 144 10.1 All types .144 10.1.1 General .145 10.1.2 Corrosion Protection 145

43、10.1.3 Cases Insulating Material 145 10.1.4 Current-Carrying Parts 145 10.1.5 Operating Mechanism .145 10.1.6 Spacings 146 10.2 Draw-out switches .146 11 Performance 146 11.1 General 146 11.1.1 Details 146 11.1.2 Temperature Test .149 11.1.3 Overload Test 150 11.1.4 Endurance Test 150 11.1.5 Dielect

44、ric Voltage-Withstand Test .150 11.1.6 Miscellaneous Tests 150 11.1.7 Withstand Test .151 11.2 Draw-out switches .156 11.2.1 General .156 OCTOBER 24, 2016 NMX-J-266-ANCE-2016 CSA C22.2 NO. 5-16 UL 489 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION

45、 FROM UL 11.2.2 Electrical Continuity Test 156 12 Ratings .156 13 Markings .157 ACCESSORIES 14 Construction 160 14.1 General 160 14.1.1 General Details .160 14.1.2 Installation .160 14.1.3 Mounting 162 14.1.4 Field Wiring 162 14.1.5 Strain Relief 163 14.1.6 Spacings 163 14.2 Shunt trip release devic

46、es 164 14.3 Undervoltage-trip release devices .164 14.4 Overvoltage-trip release devices 165 14.5 Electrical operators 165 14.6 Alarm and auxiliary switches 165 14.7 Mechanical interlock .166 14.8 Lock-off device 166 14.9 Lock-on device .166 15 Performance 167 15.1 General 167 15.2 Shunt-trip releas

47、e devices 169 15.2.1 Temperature .169 15.2.2 Overvoltage Test .169 15.2.3 Operation Test .169 15.2.4 Endurance Test 169 15.2.5 Dielectric Voltage-Withstand Test .170 15.3 Undervoltage-trip release devices .170 15.3.1 Temperature .170 15.3.2 Overvoltage Test .171 15.3.3 Operation Test .171 15.3.4 End

48、urance Test 172 15.3.5 Dielectric Voltage-Withstand Test .172 15.3.6 Contact Closing Test 172 15.4 Overvoltage-trip release devices 173 15.4.1 Temperature .173 15.4.2 Overvoltage Test .173 15.4.3 Operation Test .173 15.4.4 Endurance Test 173 15.4.5 Dielectric Voltage-Withstand Test .174 15.5 Electri

49、cal operators 174 15.5.1 Endurance Test 174 15.5.2 Dielectric Voltage-Withstand Test .175 15.6 Alarm and auxiliary switches 175 15.6.1 Temperature .175 15.6.2 Overload Test 175 15.6.3 Endurance Test 177 15.6.4 Dielectric Voltage-Withstand Test .177 15.7 Mechanical interlock 177 15.8 Lock-off device 178 OCTOBER 24, 2016 NMX-J-266-ANCE-2016 CSA C22.2 NO. 5-16 UL 489 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 15.9 Lock-on d