UL 1053-2015 UL Standard for Safety Ground-Fault Sensing and Relaying Equipment (Seventh Edition Reprint with revisions through and including November 19 2015).pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1053 Ground-Fault Sensing and Relaying EquipmentUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZ

2、ED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Ground-Fault Sensing and Relaying Equipment, UL 1053 Seventh Edition, Dated August 5, 2015 Summary of Topics: This revision of ANSI/UL 1053 is being issued to reaffirm approval as an American National S

3、tandard. No changes in requirements are involved. The effective date for UL LLC will be announced through Industry File Review Announcement Letter. 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, m

4、echanical 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 f

5、or any 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

6、 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 electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, dama

7、ge, 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. NOVEMBER 19, 2015 UL 1053 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUT

8、ION WITHOUT PERMISSION FROM UL NOVEMBER 19, 2015 UL 1053 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL AUGUST 5, 2015 1 UL 1053 Standard for Ground-Fault Sensing and Relaying Equipment First Edition May, 1972 Second

9、 Edition August, 1976 Third Edition June, 1992 Fourth Edition May, 1988 Fifth Edition July, 1994 Sixth Edition October, 1999 Seventh Edition August 5, 2015 This ANSI/UL Standard for Safety consists of the Seventh Edition. The most recent designation of ANSI/UL 1053 as an American National Standard (

10、ANSI) occurred on November 19, 2015. ANSI approval for a standard does not include the Cover Page, Transmittal Pages and Title Page. The Department of Defense (DoD) has adopted UL 1053 on May 27, 1988. The publication of revised pages or a new edition of this Standard will not invalidate the DoD ado

11、ption. 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:/. ULs Standards for Safety are copyrighted by UL. Neither a printe

12、d 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. COPYRIGHT 2015 UNDERWRITERS LABORATORIES INC. ANSI/UL 1053-2011 (R2015)UL COPYRIGHTED MATERI

13、AL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL AUGUST 5, 2015 GROUND-FAULT SENSING AND RELAYING EQUIPMENT - UL 1053 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODU

14、CTION 1 Scope .5 2 Glossary .6 3 Components 6 4 Units of Measurement .7 5 References .7 CONSTRUCTION 6 Enclosure 7 6.1 General .7 6.2 Cast metal .8 6.3 Sheet metal 9 6.4 Nonmetallic .10 7 Mounting 13 8 Insulating Material .13 9 Current-Carrying Parts 14 10 Internal Wiring 14 11 Supply Connections .1

15、5 11.1 General .15 11.2 Terminals .15 12 Functions 16 13 Test Circuits .16 14 Spacings 16 15 Alternative Spacings 19 16 Wiring Space .20 17 Reset .20 PERFORMANCE 18 General 20 19 Control Power Test .21 20 Output Test 21 21 Temperature Test .21 22 Calibration Test .23 23 Backfed Calibration Test 24 2

16、4 Overvoltage Test .24 25 Overload Test 24 26 Endurance Test 25 27 Dielectric Voltage-Withstand Test .25 28 Component Failure Test .26 29 Current Withstand Test 26 30 Dust Test 26 RATINGS 31 Details .27 MARKINGS AUGUST 5, 2015 GROUND-FAULT SENSING AND RELAYING EQUIPMENT - UL 1053 3UL COPYRIGHTED MAT

17、ERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 32 Details .27 33 Permanence of Marking .29 INSTALLATION TEST PROCEDURES 34 Details .29 APPENDIX A Standards for ComponentsA1 AUGUST 5, 2015 GROUND-FAULT SENSING AND RELAYING EQUIPMENT - UL 1053 4UL COPYRIGHTED

18、MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover ground-fault current sensing devices, relaying equipment, or combinations of ground-fault current sensing devices and relaying equipment or equivalent protect

19、ion equipment for use in ordinary locations that will operate to cause a disconnecting device to open all ungrounded conductors at predetermined values of ground-fault current, in accordance with the National Electrical Code, ANSI/NFPA 70. 1.2 These requirements cover equipment intended for use in c

20、ircuits that are solidly grounded. 1.3 These requirements do not cover equipment intended to be powered from single-phase circuits operating at more than 600 volts or three-phase circuits operating at more than 600 volts phase-to-phase. 1.4 These requirements do not cover ground-fault circuit-interr

21、upters. 1.5 These devices are intended to operate with shunt-trip circuit breakers, electrically tripped bolted pressure contact switches and the like that constitute the disconnecting means. 1.6 A Class I ground-fault protection device is one that does not incorporate means to prevent opening of th

22、e disconnecting means at high levels of fault current and is intended for use with the following: a) Circuit breakers, b) Fused circuit breakers, c) Fused switches having an interrupting rating not less than 12 times their ampere rating, or d) Fused switches having integral means to prevent disconne

23、cting at levels of fault current exceeding the contact interrupting rating of the switch. 1.7 A Class II ground-fault protection device is one that incorporates means to prevent initiation of opening of the disconnecting device if the fault current exceeds the contact interrupting capability of the

24、disconnecting device with which it is intended to be used. 1.8 These requirements cover enclosed-type devices and also cover open-type devices that are intended for use in other equipment, such as panelboards, switchboards, and the like. AUGUST 5, 2015 GROUND-FAULT SENSING AND RELAYING EQUIPMENT - U

25、L 1053 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2 Glossary 2.1 GROUND-FAULT RELAYING EQUIPMENT That element of ground-fault current sensing and relaying equipment that responds to a specied signal from a ground-fault sensor. The powe

26、r to operate the relaying equipment may be derived from the ground fault, from a separate source, or both. The output of such relaying equipment may: a) Include a switching device, b) Transmit a trip energy signal, or c) Be any combination of a) and b) that is directly or indirectly capable of causi

27、ng a disconnecting device to operate. 2.2 GROUND-FAULT SENSOR That element of ground-fault current sensing and relaying equipment that detects ground fault current and transmits a resulting signal to ground fault-relaying equipment. 2.3 OPERATING TIME The time elapsed between pick-up and operation (

28、tripping or generation of output signal) of ground-fault current sensing and relaying equipment. 2.4 PICK-UP CURRENT A nominal value that is related to the lowest value of current (pick-up) that will cause ground-fault relaying equipment to ultimately operate under specied conditions, at its setting

29、, if provided, or rating. 3 Components 3.1 Except as indicated in 3.2, a 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 generally used in the products covered by this Standard. 3.2 A co

30、mponent is not required to comply with a specic 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. 3.3 A component shall be used in accordance with

31、its rating established for the intended conditions of use. 3.4 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 specied limits, and shall

32、 be used only under those specic conditions. AUGUST 5, 2015 GROUND-FAULT SENSING AND RELAYING EQUIPMENT - UL 1053 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4 Units of Measurement 4.1 Values stated without parentheses are the requireme

33、nt. Values in parentheses are explanatory or approximate information. 5 References 5.1 Any undated reference 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. CONSTRUCTION 6 Enclosure 6.1 General 6.1

34、.1 An enclosure of ground-fault sensing and relaying equipment shall be so constructed and assembled that it will have the strength and rigidity necessary to resist the abuses to which it is likely to be subjected, without total or partial collapse resulting in an increased risk of re due to reducti

35、on of spacings, loosening or displacement of parts, or other serious defects. 6.1.2 The enclosure referred to in 6.1.1 is the ultimate enclosure and does not include protective covers, dust covers, shields, and the like that are part of open type devices intended to be installed in other equipment t

36、hat provides the ultimate enclosure. 6.1.3 Among the factors taken into consideration when an enclosure is being judged for acceptability are its physical strength, resistance to impact, moisture-absorptive properties, combustibility, resistance to corrosion, and resistance to distortion at temperat

37、ures to which the enclosure may be subject under conditions of normal or abnormal use. For a nonmetallic enclosure or part of an enclosure, all these factors are considered with respect to thermal aging. 6.1.4 There shall be no ventilating openings in the enclosure of ground-fault sensing and relayi

38、ng equipment unless the conditions of use of such equipment necessitates ventilation and it can be shown by test that electrical disturbances within the enclosure will be contained. In no case shall there be such openings in an enclosure or a compartment of an enclosure containing a fuse or any port

39、ion of a circuit breaker other than the operating handle. 6.1.5 A ventilating opening in an enclosure, including a perforated hole, a louver, or an opening protected by means of wire screening, expanded metal, or a perforated cover, shall be of such size or shape that no opening will permit passage

40、of a rod having a diameter greater than 1/2 inch (12.7 mm). Exception: If the distance between an uninsulated live part and the opening is greater than 4 inches (102 mm), the opening may be larger than that previously mentioned, provided no opening will permit passage of a rod having a diameter grea

41、ter than 3/4 inch (19.1 mm). 6.1.6 The diameter of the wires of a screen shall not be less than 0.051 inch (1.30 mm) if the screen openings are 1/2 square inch (323 mm 2 ) or less in area, and shall not be less than 0.081 inch (2.06 mm) for larger screen openings. AUGUST 5, 2015 GROUND-FAULT SENSING

42、 AND RELAYING EQUIPMENT - UL 1053 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 6.1.7 Perforated sheet steel and sheet steel employed for expanded-metal mesh shall not be less than 0.042 inch (1.07 mm) thick if uncoated and not less than

43、0.045 (1.14 mm) if galvanized for mesh openings or perforations 1/2 square inch (323 mm 2 ) or less in area, and shall not be less than 0.080 inch (2.03 mm) thick if uncoated and not less than 0.084 inch (2.13 mm) if galvanized for larger openings. 6.1.8 No covering is required across the top of the

44、 surrounding enclosure of a oor-mounted unit if the enclosure is 6 feet (1.83 m) or more in height and if exposed live parts within the device are not less than 6 inches (152 mm) below the upper edge of the enclosure. 6.1.9 A part of the enclosure such as a door, cover, or the like shall be provided

45、 with a means, such as latches, locks, interlocks, or screws for rmly securing it in place. 6.2 Cast metal 6.2.1 A cast-metal enclosure shall: a) Be at least 1/8 inch (3.2 mm) thick at every point; Exception: Malleable iron and die-cast or permanent mold cast aluminum, brass, or bronze metal may not

46、 be less than 3/32 inch (2.4 mm) thick for an area greater than 24 square inches (155 cm 2 ) or having any dimension greater than 6 inches (152 mm), and may not be less than 1/16 inch (1.6 mm) thick for any area of 24 square inches or less and having no dimension greater than 6 inches. The area limi

47、tation for metal 1/16 inch thick may be obtained by the provision of reinforcing ribs subdividing a larger area. b) Be more than 1/8 inch thick at reinforcing ribs and door edges; and c) Comply with Table 6.1 in the area: 1) Where tapped holes are provided for the connection of conduit or 2) Intende

48、d to be tapped in the eld as noted in 32.8. Exception: The maximum thickness specied in Table 6.1 may be exceeded if holes for smaller size conduit are counterbored and tapped if the tapped portion complies with the table for the conduit size involved. AUGUST 5, 2015 GROUND-FAULT SENSING AND RELAYIN

49、G EQUIPMENT - UL 1053 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Table 6.1 Cast-metal box thickness at tapped holes for conduit Trade size of conduit, inches Thickness of metal, inch (mm) Minimum Maximum 1/2 3/4 7/32 (5.6) 1/2 (12.7) 1 2 17/64 (6.8) 45/64 (17.9) 2-1/2 6 3/8 (9.5) 1-1/8 (28.6) 6.2.2 Zinc-base die-cast metal shall not be used for an enclosure. 6.2.3 If threads for the connection of conduit are tapped all the way through a