UL 489-2013 UL Standard for Safety Molded-Case Circuit Breakers Molded-Case Switches and Circuit-Breaker Enclosures (Twelfth Edition Reprint with Revisions Through and Including Ma.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 EnclosuresUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM U

2、LUL 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 Twelfth Edition, Dated January 15, 2013 SUMMARY OF TOPICS This revision of

3、ANSI/UL 489 incorporates the following: 1. Removal of Parts for Accessory Installation 2. Optional Marking for Adjustable Trip Circuit Breakers with Ground Fault Element 3. Correction to Testing of 3-Pole Breakers for Use in Single Phase Circuits 4. Clarication of Overvoltage Test Method - Undervolt

4、age Trip Release 5. Addition of Requirements for Molded-Case Switches to Supplement SB 6. Addition of Requirements for Molded-Case Switches to Supplement SA 7. Clarication of Lock-Off and Lock-On Devices 8. Revisions for Table 6.1.6.1.2 9. Addition of Requirements for Class 2 Spacings 10. Addition o

5、f EMC Requirements in Supplements SF and SG 11. Addition of Requirements for Molded-Case Switches to Supplement SC 12. Clarication of the Interrupting Test of the High Available Fault Current Test Sequence 13. Clarication of Test Procedure for Series-Connected Circuit Breakers Text that has been cha

6、nged in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. The new and revised requirements are substantially in accordance with Proposal(s) on this subject dated June 28, 2013 and November 15, 2013. All rights reserved. No part of this publicati

7、on 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 expressed or implied, including but not limit

8、ed to, the implied warranties of merchantability or tness for any purpose. MARCH 7, 2014 UL 489 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL In no event will UL be liable for any special, incidental, consequential, indirect or similar

9、damages, including loss of prots, lost savings, loss of data, or any other damages arising 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 ex

10、ceed the price paid for this Standard, regardless of the form of the claim. Users of the 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) re

11、sulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, gures, and/or other elements of the Standard having future effective

12、 dates as indicated in the preface. The prior text for requirements that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. The following table lists the future effective dates with the corresponding reference

13、. Future Effective Date Reference January 15, 2017 9.1.1.22, 18.1.13, SD4.1, SD4.2, SD4.3, and Figure 7.1.7.1 March 7, 2020 1.7, 7.1.1.22, Supplement SF, and Supplement SG MARCH 7, 2014 UL 489 tr2UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM

14、UL Association of Standardization and Certication NMX-J-266-ANCE-2013 Fourth Edition CSA Group CSA C22.2 No. 5-13 Third Edition Underwriters Laboratories Inc. UL 489 Twelfth Edition Molded-Case Circuit Breakers, Molded-Case Switches, and Circuit-Breaker Enclosures January 15, 2013 (Title Page Reprin

15、ted: March 7, 2014) ANSI/UL 489-2014UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Commitment for Amendments This standard is issued jointly by the Association of Standardization and Certication (ANCE), the Canadian Standards Association (o

16、perating 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 Group, or UL at any time. Revisions to this standard will be made only after processing according to the standards development procedures of

17、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 issue. 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 pag

18、es. Copyright 2013 ANCE Rights reserved in favor of ANCE. ISBN 978-1-77139-208-2 2013 CSA Group All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher. This Standard is subject to periodic review, and suggestions for it

19、s improvement will be referred to the appropriate committee. To submit a proposal for change, please send the following information 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 p

20、roposed change; and rationale for the change. 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 2014 Underwriters Laboratories Inc. ULs Standards for Safety are copyrighted by UL. Neither

21、 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 Twelfth Edition. The most recent d

22、esignation of ANSI/UL 489 as an American National Standard (ANSI) occurred on March 7, 2014. ANSI approval for a standard does not include the cover page, transmittal pages, title page (front and back), preface, or superseded requirements. The Department of Defense (DoD) has adopted UL 489 on Januar

23、y 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 edition of

24、 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 purchase UL St

25、andards, 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 13 INTRODUCTION 1 Scope .14A 2 Denitions .14A 3 Components 20 4 Units of Measuremen

26、t 21 5 Reference Publications .21 MOLDED CASE CIRCUIT BREAKERS 6 Construction .21 6.1 All types 21 6.1.1 General 21 6.1.2 Corrosion Protection 22 6.1.3 Cases Insulating Material 22 6.1.4 Current-Carrying Parts .23 6.1.5 Operating Mechanism .27 6.1.6 Spacings .29 6.2 Current-limiting circuit breakers

27、 .35 6.3 Instantaneous-trip circuit breakers .36 6.4 Circuit breaker and ground-fault circuit-interrupters 36 6.4.1 General 36 6.4.2 Supervisory Circuit 36 6.5 Circuit breakers with equipment ground-fault protection 36 6.6 Integrally fused circuit breakers, high-fault protectors, and high-fault modu

28、les .37 6.7 Adjustable circuit breakers 38 6.8 Heating, air conditioning, and refrigeration (HACR) circuit breakers 38 6.9 Remotely-operated circuit breakers 39 6.10 Switching duty (SWD) rated circuit breakers .39 6.11 400 Hz rated circuit breakers 39 6.12 Draw-out circuit breakers 39 6.13 Series-co

29、nnected circuit breakers 40 6.14 Interchangeable-trip circuit breakers 40 6.15 High-intensity-discharge (HID) type circuit breakers .40 6.16 Circuit breakers for use with 16 or 18 AWG wire .41 6.17 4-pole circuit breakers 41 6.18 Circuit breakers and surge protective devices 41 6.19 Special purpose

30、not for general use circuit breakers 41 7 Tests .41 7.1 Standard circuit breakers .41 7.1.1 General 41 7.1.2 Calibration Tests 46 7.1.3 Overload Test 49 7.1.4 Temperature Test .53 7.1.5 Endurance Test .62 7.1.6 Calibration Test .65 7.1.7 Interrupting Test 65 7.1.8 Trip-out at 200 Percent Current Tes

31、t 72 MARCH 7, 2014 NMX-J-266-ANCE-2013 CSA C22.2 NO. 5-13 UL 489 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 7.1.9 Dielectric Voltage-Withstand Test .72 7.1.10 Miscellaneous Tests .73 7.1.11 High Available Fault Current Test Sequence 74

32、 7.2 Current-limiting circuit breakers .81 7.2.1 General 81 7.2.2 Calibration test .83 7.2.3 Interrupting and Let-Through Measurement Test 83 7.2.4 Trip-Out Test .88 7.2.5 Dielectric Voltage-Withstand test 88 7.2.6 Interpretation of Results .88 7.3 Instantaneous-trip circuit breakers .88 7.3.1 Gener

33、al 88 7.4 Circuit breaker and ground-fault circuit-interrupters 90 7.4.1 General 90 7.4.2 Circuit Breaker Test Sequences 90 7.4.3 High Available Fault-Current Circuits 95 7.4.4 Ground-Fault Circuit-Interrupter Tests .96 7.5 Circuit breakers with equipment ground-fault protection 99 7.5.1 General 99

34、7.5.2 Circuit Breaker Test Sequences 99 7.5.3 High Available Fault Current Circuits Tests .105 7.5.4 Ground Fault Protection Tests .106 7.6 Integrally fused circuit breakers, high-fault protectors, and high-fault modules 106 7.7 Adjustable circuit breakers .109 7.7.1 General .109 7.7.2 Adjustable Cu

35、rrent Setting (I r ) .109 7.7.3 Short-Time Delay 110 7.7.4 Instantaneous Pick-Up Setting .110 7.7.5 Ground-Fault Trip Response 110 7.8 Heating, air conditioning, and refrigeration (HACR) circuit breakers .111 7.9 Remotely-operated circuit breakers .111 7.10 Switching duty (SWD) rated circuit breaker

36、s 111 7.11 400 Hz rated circuit breakers .112 7.12 Draw-out circuit breakers .112 7.12.1 Electrical Continuity Test 112 7.12.2 Dielectric Voltage-Withstand Test .113 7.13 Series-connected circuit breakers .113 7.13.1 General .113 7.13.2 Selection of Test Samples .113 7.13.3 Test Procedure .115 7.13.

37、4 Closing Test .118 7.13.5 Interrupting Test 118 7.13.6 Intermediate Interrupting Test 119 7.13.7 Trip-Out Test .120 7.13.8 Dielectric Voltage-Withstand Test .120 7.13.9 Interpretation of Test Results .120 7.14 Interchangeable-trip circuit breakers .120 7.15 High-intensity-discharge (HID) type circu

38、it breakers .120 7.16 Circuit breakers for use with 16 or 18 AWG wire 121 7.16.1 General .121 7.16.2 Circuit Breaker Test Sequences 121 7.16.3 High Available Fault Current Test Sequence .122 7.16.4 Thermal Withstand Sequence 122 JANUARY 15, 2013 NMX-J-266-ANCE-2013 CSA C22.2 NO. 5-13 UL 489 4UL COPY

39、RIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 7.17 4-pole circuit breakers .123 7.18 Joints with insulators 123 7.19 Circuit breakers and surge protective devices .123 7.20 Special purpose not for general use circuit breakers .124 8 Ratings 124 9

40、 Markings .125 9.1 General .125 9.1.1 Details 125 9.1.2 Terminations 130 9.1.3 Interrupting Ratings 132 9.1.4 Special Markings 132 9.2 Current-limiting circuit breakers 133 9.3 Instantaneous-trip circuit breakers 133 9.4 Circuit breaker and ground-fault circuit-interrupters .133 9.5 Circuit breakers

41、 with equipment ground-fault protection .134 9.6 Integrally fused circuit breakers and high fault protectors 134 9.7 Adjustable circuit breakers .135 9.8 Heating, air conditioning, and refrigeration (HACR) circuit breakers .135 9.9 Remotely-operated circuit breakers .135 9.10 Switching duty (SWD) ra

42、ted circuit breakers 136 9.11 400 Hz rated circuit breakers .136 9.12 Draw-out circuit breakers .136 9.13 Series-connected circuit breakers .136 9.14 Interchangeable-trip circuit breakers .136 9.15 High-intensity-discharge (HID) type circuit breakers .137 9.16 Rating plugs 137 9.17 Circuit breakers

43、for use with 16 or 18 AWG wire 137 9.18 4-pole circuit breakers .137 MOLDED CASE SWITCHES 10 Construction 138 10.1 All types .138 10.1.1 General .138 10.1.2 Corrosion Protection 138 10.1.3 Cases Insulating Material 138 10.1.4 Current-Carrying Parts 138 10.1.5 Operating Mechanism .138 10.1.6 Spacings

44、 139 10.2 Draw-out switches .139 11 Performance 139 11.1 General 139 11.1.1 Details 139 11.1.2 Temperature Test .143 11.1.3 Overload Test 144 11.1.4 Endurance Test 144 11.1.5 Dielectric Voltage-Withstand Test .144 11.1.6 Miscellaneous Tests 144 11.1.7 Withstand Test .145 11.2 Draw-out switches .150

45、11.2.1 General .150 11.2.2 Electrical Continuity Test 150 12 Ratings .150 JANUARY 15, 2013 NMX-J-266-ANCE-2013 CSA C22.2 NO. 5-13 UL 489 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 13 Markings .151 ACCESSORIES 14 Construction 154 14.1 G

46、eneral 154 14.1.1 General Details .154 14.1.2 Installation .154 14.1.3 Mounting 156 14.1.4 Field Wiring 156 14.1.5 Strain Relief 157 14.1.6 Spacings 157 14.2 Shunt trip release devices 158 14.3 Undervoltage-trip release devices .158 14.4 Overvoltage-trip release devices 159 14.5 Electrical operators

47、 159 14.6 Alarm and auxiliary switches 159 14.7 Mechanical interlock .160 14.8 Lock-off device 160 14.9 Lock-on device .160 15 Performance 161 15.1 General 161 15.2 Shunt-trip release devices 163 15.2.1 Temperature .163 15.2.2 Overvoltage Test .163 15.2.3 Operation Test .163 15.2.4 Endurance Test 16

48、3 15.2.5 Dielectric Voltage-Withstand Test .164 15.3 Undervoltage-trip release devices .164 15.3.1 Temperature .164 15.3.2 Overvoltage Test .165 15.3.3 Operation Test .165 15.3.4 Endurance Test 166 15.3.5 Dielectric Voltage-Withstand Test .166 15.3.6 Contact Closing Test 166 15.4 Overvoltage-trip re

49、lease devices 167 15.4.1 Temperature .167 15.4.2 Overvoltage Test .167 15.4.3 Operation Test .167 15.4.4 Endurance Test 167 15.4.5 Dielectric Voltage-Withstand Test .168 15.5 Electrical operators 168 15.5.1 Endurance Test 168 15.5.2 Dielectric Voltage-Withstand Test .169 15.6 Alarm and auxiliary switches 169 15.6.1 Temperature .169 15.6.2 Overload Test 169 15.6.3 Endurance Test 171 15.6.4 Dielectric Voltage-Withstand Test .171 15.7 Mechanical interlock 171 15.8 Lock-off device 172 15.9 Lock