UL 1047-2015 UL Standard for Safety Isolated Power Systems Equipment (Sixth Edition).pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1047 Isolated Power Systems EquipmentUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURT

2、HER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Isolated Power Systems Equipment, UL 1047 Sixth Edition, Dated October 15, 2015 SUMMARY OF TOPICS The Sixth Edition of the Standard for Isolated Power Systems Equipment, UL 1047, has been issued to reect the reaff

3、irmation of the ANSI approval. No changes in requirements have been made. The requirements are substantially in accordance with Proposal(s) on this subject dated August 7, 2015. . All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any

4、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 limited to, the implied warranties of merchantability or tness for any purpose.

5、 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 arising out of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been ad

6、vised 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 electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against an

7、y loss, expense, liability, damage, 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. OCTOBER 15, 2015 UL 1047 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FU

8、RTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 15, 2015 UL 1047 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 15, 2015 1 UL 1047 Standard for Isolated Power Systems Equipment First Edi

9、tion August, 1976 Second Edition December, 1990 Third Edition March, 1995 Fourth Edition September, 2003 Fifth Edition October, 2010 Sixth Edition October 15, 2015 This ANSI/UL Standard for Safety consists of the Sixth Edition. The most recent designation of ANSI/UL 1047 as a Reaffirmed American Nat

10、ional Standard (ANS) occurred on October 15, 2015. ANSI approval for a standard does not include the Cover Page, Transmittal Pages and Title Page. 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

11、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 be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shal

12、l remain the sole and exclusive property of UL. COPYRIGHT 2015 UNDERWRITERS LABORATORIES INC. ANSI/UL 1047-2010 (R2015)UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 15, 2015 ISOLATED POWER SYSTEMS EQUIPMENT - UL 1047 2 No Text on T

13、his PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 Glossary .5 3 General 6 3.1 Components .6 3.2 Units of measurement .7 3.3 Undated reference 7 CONSTRUCTION 4 General 7 5 Enclosure 7 6 Ventilation 8 7

14、 Connections for Wiring Systems 9 8 Corrosion Protection .9 9 Bases Insulating Material .9 10 Mounting of Parts .10 11 Current-Carrying Parts 13 12 Permanently Connected Equipment .13 13 Field-Wiring Terminals and Leads 13 14 Cord-Connected Equipment 16 14.1 General .16 14.2 Strain relief 16 14.3 Bu

15、shings 17 15 X-Ray Equipment .17 16 Wall Modular Units 17 17 Internal Wiring 18 18 Separation of Circuits .19 18.1 Factory installed 19 18.2 Field-installed Class 2 19 19 Field-Wiring Space 20 19.1 General .20 19.2 Wire bending space 20 20 Spacings 23 21 Isolation Transformers .26 22 Line Isolation

16、Monitor .28 23 Overcurrent Protection 28 24 Switches .29 25 Receptacles 29 26 Grounding Jacks and Cord Assemblies 30 27 Reference Grounding Bus .30 PERFORMANCE 28 Regulation .32 29 Temperature .33 30 Leakage Current 36 31 Dielectric Voltage-Withstand .44 32 Stability 45 OCTOBER 15, 2015 ISOLATED POW

17、ER SYSTEMS EQUIPMENT - UL 1047 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 33 Strength of Insulating Base and Supports 45 34 Abnormal Operation .45 35 Push-Back Relief .46 MANUFACTURING AND PRODUCTION TESTS 36 Production-Line Dielectric

18、 Voltage-Withstand .46 37 Production-Line Grounding Continuity .48 RATING 38 Details .48 MARKING 39 Details .48 APPENDIX A Standards for ComponentsA1 OCTOBER 15, 2015 ISOLATED POWER SYSTEMS EQUIPMENT - UL 1047 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT P

19、ERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover isolated power systems equipment rated 600 Vac or less, intended for installation and use in nonhazardous areas in health care facilities in accordance with the requirements in Article 517 of the National Electrical Code, NFPA 70, a

20、nd in the Standard for Health Care Facilities, NFPA 99. 1.2 These requirements cover isolated power centers, either cord-connected or permanently wired, consisting of a distribution panel that incorporates an isolation transformer, one or more isolated ungrounded secondary circuits terminating in in

21、tegrally mounted grounding-type receptacles, a reference grounding bus bar, and line isolation monitor. Isolated power centers may have provision for connection of grounding conductors to remote grounding jacks, the room bonding points, and patient equipment grounding points. A permanently wired iso

22、lated power center may also have provision for connection to remote receptacles or indicators. 1.3 These requirements cover convertible system units that facilitate a temporary conversion of the power supply for a power center from a grounded supply to an isolated supply. 1.4 These requirements cove

23、r isolated power panelboards that incorporate the same features as permanently wired isolated power centers except that: a) They may be supplied from remote isolation transformers, and b) The secondary isolated circuits are intended to be connected by conduit to remotely located receptacles. 1.5 The

24、se requirements cover wall modular units containing isolated power systems. 1.6 These requirements cover cord-connected isolated power centers, and panels intended to supply x-ray equipment only. 2 Glossary 2.1 For the purpose of this standard the following denitions apply. 2.2 CONVERTIBLE-SYSTEM UN

25、IT An enclosed assembly incorporating an isolation transformer and line isolation monitor with interconnecting cord assemblies that facilitate temporary conversion of the power supply for a power center from a grounded supply to an isolated supply. The unit is intended for use only with the specic p

26、ower centers for which it has been designed. 2.3 FIELD-WIRING TERMINAL A terminal to which a supply or other wire can be connected by an installer in the eld is a eld-wiring terminal unless a lead is provided as part of a pressure terminal connector, or other means for making the connection is facto

27、ry-assembled to the wire. OCTOBER 15, 2015 ISOLATED POWER SYSTEMS EQUIPMENT - UL 1047 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2.4 LINE ISOLATION MONITOR A test instrument designed to continually check the balanced and unbalanced imp

28、edance from each line of an isolated circuit to ground and equipped with a built-in test circuit to actuate an alarm without adding to the leakage current. 2.5 MOMENTARY RATING A rating based on an operating interval that does not exceed 5 s. 2.6 PATIENT EQUIPMENT GROUNDING POINT A jack or terminal

29、bus that serves as the collection point for redundant grounding of electric appliances serving a patient vicinity or for grounding other items in order to eliminate electromagnetic interference problems. 2.7 REFERENCE GROUNDING POINT A terminal bus that is an extension of the equipment grounding bus

30、 and is a convenient collection point for grounding all electric appliances, equipment, and exposed conductive surfaces in a patient vicinity. 2.8 ROOM BONDING POINT A grounding terminal bus that serves as the collection point for grounding exposed metal or conductive building surfaces in a room. 2.

31、9 WALL MODULAR UNIT A factory-built wall section or sections typically containing various combinations of gas outlets, lighting xtures, clocks, intercommunication units, and the like for use in, within, or as part of health-care facilities. Only units containing isolated power systems equipment are

32、covered by this standard. Grounded power circuits that are physically segregated and separated may also be included. 3 General 3.1 Components 3.1.1 Except as indicated in 3.1.2, a component of a product covered by this standard shall comply with the requirements for that component. See Appendix A fo

33、r a list of standards covering components generally used in the products covered by this standard. 3.1.2 A component 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 stand

34、ard, or b) Is superseded by a requirement in this standard. 3.1.3 A component shall be used in accordance with its rating established for the intended conditions of use. 3.1.4 Specic components are incomplete in construction features or restricted in performance capabilities. Such components are int

35、ended for use only under limited conditions, such as certain temperatures not exceeding specied limits, and shall be used only under those specic conditions. OCTOBER 15, 2015 ISOLATED POWER SYSTEMS EQUIPMENT - UL 1047 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION W

36、ITHOUT PERMISSION FROM UL 3.2 Units of measurement 3.2.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 3.3 Undated reference 3.3.1 Any undated reference to a code or standard appearing in the requirements of this standard sha

37、ll be interpreted as referring to the latest edition of that code or standard. CONSTRUCTION 4 General 4.1 Isolated power systems equipment shall employ materials throughout that are acceptable for the application, and shall be made and nished with the degree of uniformity and grade of workmanship pr

38、acticable in a well-equipped factory. 4.2 A convertible system unit shall be designed to convert a specic power center from a grounded supply to an isolated supply. The specic power center shall consist of overcurrent protection devices, receptacles, grounding jacks and components other than the tra

39、nsformer and line isolation monitor that have been previously permanently installed. Also the grounding conductor from the grounded supply to the distribution panel or modular wall section shall remain continuous and so arranged that it is not interrupted by the converting procedure. 4.3 An enclosur

40、e, an opening, a frame, a guard, a knob, a handle, or the like shall not be sufficiently sharp to cause a risk of injury in normal maintenance or use. 4.4 Equipment shall be formed so that it will have the strength and rigidity necessary to resist the abuses to which it may be subjected, without inc

41、reasing the risk of re, electric shock, or injury to persons due to total or partial collapse with resulting reduction of spacings, loosening or displacement of parts or other serious defects. 5 Enclosure 5.1 The enclosure of isolated power systems equipment shall comply with the Standard for Enclos

42、ures for Electrical Equipment, UL 50. Exception: An enclosure may be ventilated in accordance with Ventilation, Section 6. 5.2 An enclosure cover or door shall be hinged, sliding, or similarly attached so that it cannot be wholly detached without the use of a tool, if it gives access to a fuse or an

43、y other overload-protective device the normal functioning of which requires renewal, or if it is necessary to open the cover during normal operation of the device. OCTOBER 15, 2015 ISOLATED POWER SYSTEMS EQUIPMENT - UL 1047 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBU

44、TION WITHOUT PERMISSION FROM UL 6 Ventilation 6.1 A ventilating opening in an enclosure shall be constructed and located so that no ame or molten metal will be emitted during the arcing encountered during the operation of fuses, switches, or circuit breakers. 6.2 Unless the opening is remote from th

45、e arcing part, the requirement in 6.1 necessitates the interposing of a noncombustible barrier between a ventilating opening and a possible source of arcing such as a switch, fuse, and the like. 6.3 The barrier shall be of such dimensions and located so that straight lines drawn from any arcing part

46、 past the edge of the barrier will dene an area at the plane of the opening 1/4 in (6.4 mm) beyond the edges of the opening. 6.4 A sheet-steel barrier shall not be less than 0.053 in (1.35 mm) thick if uncoated and not less than 0.056 in (1.42 mm) thick if galvanized. Exception: A steel barrier may

47、be of lesser thickness provided its strength and rigidity is not less than that of a at sheet of steel of the specied thickness having the same dimensions as the barrier. 6.5 The thickness of a nonmetallic barrier may be less than 1/4 in (6.4 mm) if the barrier is located so that it will not be subj

48、ect to mechanical abuse during installation and is located and supported so that it will have the necessary mechanical strength and rigidity. 6.6 A ventilating opening in an enclosure shall have such size or shape, or shall be covered by screening or by an expanded, perforated, or louvered metal pan

49、el so that a test rod of the diameter specied in 6.7 will not enter the opening. 6.7 The test rod mentioned in 6.6 shall be 33/64 inch (13.2 mm) in diameter if the plane of the opening is less than 4 in (102 mm) from an uninsulated live part, or 49/64 inch (19.4 mm) in diameter if the plane of the opening is 4 in or more from such part. 6.8 The size, shape, and location of a screened opening shall be such as not to unduly weaken the overall enclosure. 6.9 The area of a ventilating opening in an