ANSI UL 1062-1997 UL Standard for Safety Unit Substations (Third Edition Reprint with Revisions Through and Including June 13 2014).pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1062 Unit SubstationsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION

2、 OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Unit Substations, UL 1062 Third Edition, Dated January 29, 1997 Summary of Topics This edition of ANSI/UL 1062 is being revised to reect the rst time ANSI approval of the Standard. No changes in the requirements are involved. Tex

3、t that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. Changes in requirements are marked with a vertical line in the margin and are followed by an effective date note indicating the date of publication or the date on which

4、 the changed requirement becomes effective. The revisions are substantially in accordance with Proposal(s) on this subject dated April 4, 2014. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mecha

5、nical 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 limited to, the implied warranties of merchantability or tness for any purpose. In no event will UL be liable for a

6、ny special, incidental, consequential, indirect or similar 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 dam

7、age. 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 electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, damage,

8、claim, or judgment (including reasonable attorneys fees) resulting 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, an

9、d/or other elements of the Standard having future effective dates as indicated in the note following the affected item. 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. J

10、UNE 13, 2014 UL 1062 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JUNE 13, 2014 UL 1062 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JANUARY 29, 1997

11、 (Title Page Reprinted: June 13, 2014) 1 UL 1062 Standard for Unit Substations Prior to the rst edition, the requirements for the products covered by this standard were derived from the Standard for Enclosures for Electrical Equipment, UL 50 (when the title for UL 50 was Cabinets and Boxes); the Sta

12、ndard for Specialty Transformers, UL 506; the Standard for Service Equipment, UL 869; and the Standard for Dead-Front Switchboards, UL 891. First Edition March, 1983 Second Edition April, 1993 Third Edition January 29, 1997 This ANSI/UL Standard for Safety consists of the Third Edition including rev

13、isions through June 13, 2014. The most recent designation of ANSI/UL 1062 as an American National Standard (ANSI) occurred on June 11, 2014. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page, or effective date information. Comments or proposals for revisions

14、 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:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should

15、 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. COPYRIGHT 2014 UNDERWRITERS LABORATORIES INC. ANSI/UL 1062-2014UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DIST

16、RIBUTION WITHOUT PERMISSION FROM UL JULY 12, 2004 UNIT SUBSTATIONS - UL 1062 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 General 5 2.1 Components .5 2.2 Units of measurement .6 2.3

17、 Undated references .6 3 Glossary .6 CONSTRUCTION 4 General 6A 5 Materials .7 6 Rust and Corrosion Resistance .7 7 Mechanical Assembly .7 8 Framework and Enclosure .8 8.1 Frame .8 8.2 Enclosure .8 8.3 Sheet metal 9 8.4 Specic environmental conditions .12 8.5 Type 3R enclosures .12 8.5A Type 3RX encl

18、osures .15 8.6 Components mounted on doors and covers 15 8.7 Ventilation general .16 8.8 Ventilation panelboard section .16A 8.9 Ventilation transformer section 18 9 Doors and Covers .19 9.1 General 19 9.2 Flanges for metallic enclosures .19 9.3 Fastenings .24 9.4 Butt hinges .24 9.5 Piano hinges 25

19、 9.6 Latches 25 10 Dead Front Construction .26 11 Filler Plates 26 12 Wiring Space .27 12.1 General .27 12.2 Wire bending space 27 12.3 Clear wiring space 30 12.4 Restricting barriers .32 12.5 Bushings 32 12.6 Screw and rivet heads 32 13 Insulating Materials .32 14 Coil Insulation 33 15 Current-Carr

20、ying Parts 33 15.1 General .33 15.2 Plating 34 15.3 Bus bars 34 15.4 Wiring .36 16 Wiring Terminals 39 JULY 12, 2004 UNIT SUBSTATIONS - UL 1062 2AUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 17 Service Equipment Use 42A 18 Disconnecting M

21、eans 42A 18.1 General 42A 18.2 Ground fault protection 43 18.3 Neutral disconnecting means 44 19 Overcurrent Protection 44 20 Switching Means .46 21 Spacings 47 21.1 General .47 21.2 Insulating barriers 52 22 Grounding and Bonding .53 22.1 General .53 22.2 Equipment grounding terminals 56 PERFORMANC

22、E 23 General 57 24 Impedance Test 57 25 Temperature Test .60 25.1 General .60 25.2 Direct loading method .63 25.3 Load back method .63 25.4 Impedance kVA method 3-phase transformer 63 25.5 Units for wall mounting 63 25.6 Units for oor mounting .66 25.7 Dielectric voltage-withstand 67 26 Rain Test 67

23、 27 Dielectric Voltage-Withstand Test 68B 27.1 Applied potential 68B 27.2 Induced potential .69 27.3 Clamped joint 70 27.4 Barriers .70 28 Overload Test 70 29 Dielectric Voltage-Withstand Test Repeated 71 30 Coating Thickness Test 71 31 Compression Test 72 32 Deection Test .72 33 Strength Test of In

24、sulating Base and Support 73 34 Lifting Hook or Bracket Test 74 35 Wall-Mounting Means Test .74A TESTS BY THE MANUFACTURER 36 Dielectric Voltage-Withstand Test 74A 37 Ground Fault Protection Test .74A 38 Bonding Resistance Test 75 RATINGS 39 General 75 DECEMBER 15, 2006 UNIT SUBSTATIONS - UL 1062 2B

25、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARKINGS 40 General 76 40.1 Location .76 40.2 Letter height .76 40.3 Identication .76 40.4 Ratings .78 40.5 Phase identication .78 40.6 Overcurrent protection 78 40.7 Service equipment 78A 40.8

26、 Neutral 79 40.9 Ground fault protection 79 40.10 Switching devices .80 40.11 Field installed units 80 40.12 Terminals 81 40.13 Transformers .86 40.14 Mountings 86 40.15 Environmental types .86A 40.16 Type 3R and 3RX enclosures .86A 40.17 Field wiring 86A 40.18 Weight .86B 41 Permanence of Marking 8

27、6B INSTALLATION INSTRUCTIONS 42 Conduit Location Instructions .86B 43 Field Testing of Ground Fault Protection of Equipment 88 APPENDIX A Standards for ComponentsA1 JULY 12, 2004 UNIT SUBSTATIONS - UL 1062 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMI

28、SSION FROM UL This page intentionally left blank. JULY 12, 2004 UNIT SUBSTATIONS - UL 1062 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover unit substations of 1000 kVA single phase and 3000

29、kVA 3-phase maximum having a maximum nominal primary or secondary rating of 600 volts. Their construction, installation, and use are intended to be in accordance with the National Electrical Code, ANSI/NFPA 70. 1.2 Deleted August 1, 2001 2 General 2.1 Components 2.1.1 Except as indicated in 2.1.2, a

30、 component of a product covered by this standard shall comply with the requirements for that component. See Appendix A for a list of standards covering components used in the products covered by this standard. 2.1.1 revised November 10, 2000 2.1.2 A component is not required to comply with a specic

31、requirement that: a) Involves a feature or characteristic not required in the application of the component in the product covered by this standard, or b) Is superseded by a requirement in this standard. 2.1.2 revised November 10, 2000 2.1.3 A component shall be used in accordance with its rating est

32、ablished for the intended conditions of use. 2.1.3 revised November 10, 2000 2.1.4 Specic components are incomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding speci

33、ed limits, and shall be used only under those specic conditions. 2.1.4 revised November 10, 2000 AUGUST 1, 2001 UNIT SUBSTATIONS - UL 1062 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2.2 Units of measurement 2.2.1 Values stated without

34、parentheses are the requirement. Values in parentheses are explanatory or approximate information. 2.2.1 revised November 10, 2000 2.2.2 All applicable alternating-current electrical measurements are in root-mean-square (rms) units unless otherwise stated. 2.3 Undated references 2.3.1 Any undated re

35、ference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. 3 Glossary 3.1 For the purpose of this standard the following denitions apply. 3.2 DUMMY FUSE A current-carrying part made of copper having s

36、uch dimensions that it will t its fuse mounting means with the same conditions of pressure, contact, and cross-sectional areas as are obtained on terminals of the fuse that it is intended to replace. 3.3 FILLER PLATE A plate intended to close an opening that would otherwise be closed by the subseque

37、nt installation of a circuit breaker or other device. 3.4 NEUTRAL Neutral refers to the grounded circuit conductor, such as: a) The center point of a wye-connected system; or b) The corner of a delta-connected system; or c) The midpoint of a 3-wire, single phase or the midpoint of one side of a delt

38、a-connected system; or d) The grounded side of a 2-wire circuit. 3.5 UNIT SUBSTATION A transformer in combination with primary or secondary overcurrent protective devices or switching devices housed in a single enclosure. NOVEMBER 10, 2000 UNIT SUBSTATIONS - UL 1062 6UL COPYRIGHTED MATERIAL NOT AUTH

39、ORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONSTRUCTION 4 General 4.1 A unit substation shall be complete when it is shipped from the factory. If a switch, circuit breaker, or the like, mounted in a unit substation must be interconnected in order for it to perform its

40、 intended function, such interconnecting busing or wiring shall be complete before it is shipped from the factory. Exception No. 1: A unit substation may have provision for the installation of a switch or circuit breaker in the secondary. If appropriate, markings as covered in 40.4.5 and 40.11.1 40.

41、11.5 shall be provided. Exception No. 2: A unit substation employing circuit breakers or switches of different physical size that require branch bus bars of different physical size or shape, or in which circuit breakers or switches rated at more than 200 amperes may be added by bolted connections, i

42、s acceptable without the branch bus bars necessary for such additions being mounted in place when the unit substation is shipped from the factory provided branch bus bars complying with 15.3.19 are available, and markings as covered in 40.11.1 and 40.11.2 are provided. 4.2 A unit substation shall be

43、 designed so that any component intended to be eld installed can be installed by the use of ordinary tools such as pliers, a screwdriver, or a wrench. 4.3 If a branch bus bar as covered in Exception No. 2 to 4.1 needs a barrier to comply with the spacing requirements in Spacings, Section 21, the bar

44、rier shall be attached to the unit substation or to the eld-installed branch bus bar. 4.4 In a space that can physically accommodate a branch circuit switch or circuit breaker, but is not intended for this, any hole for securing a branch bus bar to the secondary bus bar shall be plugged with a solid

45、 metal rivet or one way screw. A dead-front shield over the portion of bus with holes is not acceptable in lieu of plugging or omitting the holes in the bus bars. NOVEMBER 10, 2000 UNIT SUBSTATIONS - UL 1062 6AUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PE

46、RMISSION FROM UL NOVEMBER 10, 2000 UNIT SUBSTATIONS - UL 1062 6B No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 5 Materials 5.1 Materials used shall be combustion and moisture resistant. Exception: The requirement does n

47、ot apply to a minor part such as a handle, rubber-insulated wire, magnet insulation, and the like, or as otherwise permitted in these requirements. 6 Rust and Corrosion Resistance 6.1 Iron and steel parts of enclosing cases, walls, and barriers, all springs and other parts upon which mechanical oper

48、ation may depend, and sheet steel parts of fastening devices, shall be protected against rust by enameling, galvanizing, sherardizing, plating, or equivalent means. Corrosion resistance requirements for an enclosure designated as Type 3R are covered in 8.5.8 8.5.12. Corrosion resistance requirements

49、 for an enclosure designated as Type 3RX are covered in Type 3RX Enclosures, Section 8.5A. 6.1 revised July 12, 2004 7 Mechanical Assembly 7.1 A unit substation shall be constructed to provide strength and rigidity in order that it will keep its shape and that doors will close tightly. 7.2 Metal into which a screw is threaded shall provide for the engagement of at least two full threads. A rivet, screw, bolt, or similar fastener in a sheet metal enclosure shall have a diameter at least 50 p