1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1022 Line Isolation MonitorsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRO
2、DUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Line Isolation Monitors, UL 1022 Fifth Edition, Dated April 16, 2012 SUMMARY OF TOPICS The fth edition of the Standard for Safety for Line Isolation Monitors, UL 1022, has been issued to incorporate the following proposals
3、 dated October 28, 2011 and February 17, 2012: ANSI approval of the Standard for Safety for Line Isolation Monitors, UL 1022. Revision to the scope expanding the use of isolated power systems and isolation monitors. The revised requirements are substantially in accordance with Proposal(s) on this su
4、bject dated October 28, 2011, and February 17, 2012. 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, mechanical photocopying, recording, or otherwise without prior permission of UL. UL provides thi
5、s 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 any special, incidental, consequential, indirect or similar damages, including loss of prots
6、, 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 exceed the price paid for this Sta
7、ndard, 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) resulting from any error or deviat
8、ion 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 dates as indicated in the note
9、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. APRIL 16, 2012 UL 1022 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR
10、 DISTRIBUTION WITHOUT PERMISSION FROM UL APRIL 16, 2012 UL 1022 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APRIL 16, 2012 1 UL 1022 Standard for Line Isolation Monitors First Edition March, 1973 Second Edition Ju
11、ly, 1979 Third Edition March, 1994 Fourth Edition June, 1998 Fifth Edition April 16, 2012 This ANSI/UL Standard for Safety consists of the Fifth Edition. The most recent designation of ANSI/UL 1022 as an American National Standard (ANSI) occurred on April 16, 2012. ANSI approval for a standard does
12、not include the Cover Page, Transmittal Pages, Title Page, or effective date information. 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
13、 (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 shall remain the sole and exclusive property of UL. COPYRIGHT
14、 2012 UNDERWRITERS LABORATORIES INC. ANSI/UL 1022-2012UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APRIL 16, 2012 LINE ISOLATION MONITORS - UL 1022 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR D
15、ISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 General 5 2.1 Components .5 2.2 Units of measurement .6 2.3 Undated references .6 3 Glossary .6 4 Instructions and Drawings 7 CONSTRUCTION 5 Enclosure 7 5.1 General .7 5.2 Cast metal enclosures 8 5.3 Sheet metal enclosures .8
16、5.4 Nonmetallic enclosures 9 5.5 Ventilating openings .10 5.6 Covers .11 5.7 Glass panels 11 6 Electric Shock .12 7 Corrosion Protection .12 8 Field-Wiring System Connections 13 8.1 General 13 8.2 Equipment grounding connection 14 9 Internal Wiring .14 9.1 General 14 9.2 Wireways .15 9.3 Splices .15
17、 9.4 Barriers 15 9.5 Bushings .15 9.6 Strain relief .16 10 Bonding for Grounding 16 11 Components .17 11.1 Current-carrying parts .17 11.2 Insulating material 18 11.3 Lampholders and lamps .19 11.4 Meters 19 11.5 Printed-wiring boards .19 11.6 Switches 19 11.7 Protective devices 20 11.8 Alarm silenc
18、ing means 20 11.9 Audible signaling appliance 20 11.10 Mounting of components .20 11.11 Operating components .21 12 Spacings 21 13 Servicing and Maintenance 22 APRIL 16, 2012 LINE ISOLATION MONITORS - UL 1022 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PE
19、RMISSION FROM UL PERFORMANCE 14 General 23 15 Normal Operation Test 23 16 Sampling Circuit Supervision Test 25 17 Power Input Test .25 18 Leakage Current Measurements Test .25 19 Overvoltage and Undervoltage Test .30 19.1 Voltage operation 30 19.2 Undervoltage operation .30 20 Jarring Test 30 21 Tem
20、perature Test .31 22 Overload Test 34 22.1 Monitor .34 22.2 Separately energized circuits 34 23 Endurance Test 35 23.1 Monitor .35 23.2 Devices and separately energized circuits .35 24 Variable Ambient Temperature Test .35 25 Humidity Test 36 26 Electric Shock Current Test 36 27 Transient Tests .40
21、27.1 General .40 27.2 Externally-induced transients 40 27.3 Internally-induced transients .40 28 Dielectric Voltage-Withstand Test .41 29 Component Failure Test .42 30 Abnormal Operation Test 42 31 Test Switch Operation Test 42 MANUFACTURING AND PRODUCTION TESTS 32 General 42 33 Production-Line Leak
22、age Current Measurements Test .43 34 Production-Line Dielectric Voltage-Withstand Tests .43 MARKING 35 General 44 36 Supplementary .45 36.1 Installation drawing .45 36.2 Operating instructions .46 APPENDIX A Standards for ComponentsA1 APRIL 16, 2012 LINE ISOLATION MONITORS - UL 1022 4UL COPYRIGHTED
23、MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover dynamic line isolation monitors and related supplementary indicating units for supervising isolated power-supply circuits in patient care areas of health care
24、 facilities, including inhalation-anesthetizing locations in accordance with the National Electrical Code, NFPA 70. 1.2 The detectors and supplementary indicating units are intended to be: a) Included as part of an isolated power-supply center for patient care locations of health care facilities; an
25、d b) Installed in an Other-Than-Hazardous (Classied) Location of a health care facility as dened by the National Electrical Code, NFPA 70. 1.3 These requirements do not cover ground fault circuit interrupters for use on grounded alternating current systems in accordance with the National Electrical
26、Code, NFPA 70. 2 General 2.1 Components 2.1.1 Except as indicated in 2.1.2, 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. 2.1
27、.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 standard, or b) Is superseded by a requirement in this standard. 2.1.3 A component shall be used in accorda
28、nce with its rating established for the intended conditions of use. 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 specied limits
29、, and shall be used only under those specic conditions. APRIL 16, 2012 LINE ISOLATION MONITORS - UL 1022 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 parentheses are the requirement. V
30、alues in parentheses are explanatory or approximate information. 2.3 Undated references 2.3.1 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. 3 Glossary 3.1 For the purpose of
31、 this Standard the following denitions apply. 3.2 FAULT IMPEDANCE An impedance that may consist of balanced or unbalanced resistive, capacitive-reactive, or combined resistive-capacitive-reactive loads connected to either or both isolated conductors. See Figure 18.1 for load congurations. 3.3 HAZARD
32、 CURRENT The test current that would ow through a low impedance connected between either isolated conductor and ground. Hazard current includes: a) TOTAL HAZARD CURRENT (THC) Hazard current with all devices connected, including line isolation monitors, b) MONITOR HAZARD CURRENT (MHC) That portion of
33、 the total hazard current contributed only by the monitor and remote indicators, and c) FAULT HAZARD CURRENT (FHC) That portion of the total hazard current resulting when all devices, except the line isolation monitors, are connected. 3.4 LINE ISOLATION MONITOR (LIM) A test instrument designed to co
34、ntinually check the balanced and unbalanced impedances from each side of an isolated circuit to ground and equipped with a built-in test circuit to exercise an alarm without adding to the hazard current. It initiates a visual and an audible indication when the hazard current exceeds a preset thresho
35、ld level. 3.5 REMOTE INDICATOR Device connected remotely to the line isolation monitor which provides any one of the following functions; visual signal, audible signal, or both visual and audible signals which supplement the signal provided by the line isolation monitor. 3.6 VOLTAGE CLASSIFICATION a
36、) HIGH-VOLTAGE A circuit classied as high-voltage is one having circuit characteristics in excess of those of a low-voltage circuit. b) LOW-VOLTAGE A circuit classied as low-voltage is one involving a potential of not more than 30 volts alternating current (42.4 peak) or direct current, and supplied
37、 by a primary battery or by a Class 2 transformer or by a combination of transformer and xed impedance which, as a unit, complies with all the performance requirements for a Class 2 transformer. APRIL 16, 2012 LINE ISOLATION MONITORS - UL 1022 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPR
38、ODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4 Instructions and Drawings 4.1 A copy of the operating and installation instructions and related schematic, wiring diagrams, and installation drawings is to be furnished with the sample submitted for investigation to be used as a guide in the exam
39、ination and test of the unit, and for this purpose is not required to be in nal printed form. 4.2 The instructions and drawings shall include such directions and information as deemed by the manufacturer to be adequate for attaining proper installation and maintenance. A description of the circuit f
40、unctions shall be provided to facilitate understanding of the system operation. CONSTRUCTION 5 Enclosure 5.1 General 5.1.1 A line isolation monitor enclosure shall be formed and assembled so that it has the strength and rigidity required to resist the abuses to which it is subjected without total or
41、 partial collapse resulting in reduction of spacings, loosening or displacement of parts, or other serious defects. 5.1.2 All electrical parts of a line isolation monitor shall be enclosed to provide protection against contact with uninsulated live parts. 5.1.3 A compartment enclosing electrical par
42、ts shall not be open to the oor or other support on which the unit rests. 5.1.4 An enclosure for a line isolation monitor shall have provision for connection of metal-clad cable or conduit, or a nonmetallic-enclosed wiring system (for example, nonmetallic sheathed cable) acceptable for the applicati
43、on under the provisions of the National Electrical Code, ANSI/NFPA 70. Exception No. 1: An enclosure without provision for the connection of metal-clad cable, conduit, or a nonmetallic-enclosed wiring system is not prohibited from being used when there are furnished with it, denite instructions indi
44、cating the section(s) of the unit intended to be drilled in the eld for the connection(s). Exception No. 2: A line isolation monitor which is intended to be installed in an overall enclosure with other equipment is not required to have provision for connection of metal-clad cable or conduit. 5.1.5 A
45、 line isolation monitor which is to be installed in an overall enclosure shall not be exposed to an ambient temperature exceeding 50C (122F). 5.1.6 An enclosure shall have means for mounting which shall be accessible without disassembling any operating part of the unit. Removal of a completely assem
46、bled panel or printed wiring board to mount the enclosure is not considered to be disassembly of an operating part. 5.1.7 An enclosure for a line isolation monitor which is intended for recessed (ush) mounting shall not have any openings other than conduit hubs, knockouts, or openings for mounting s
47、crews. APRIL 16, 2012 LINE ISOLATION MONITORS - UL 1022 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 5.2 Cast metal enclosures 5.2.1 The thickness of cast metal for an enclosure shall be as indicated in Table 5.1, except that cast metal
48、having a thickness 1/32 inch (0.8 mm) less than that indicated in the Table 5.1 is not prohibited from being used when the surface under consideration is curved, ribbed, or otherwise reinforced, or when the shape and/or size of the surface is such that equivalent mechanical strength is provided. 5.2
49、.2 When threads for the connection of conduit are tapped all the way through a hole in an enclosure wall, or when an equivalent construction is employed, there shall not be less than 3-1/2 nor more than 5 threads in the metal, and the construction shall be such that a standard conduit bushing is capable of being properly attached. 5.2.3 When threads for the connection of conduit are tapped part way through a hole in an enclosure wall, there shall be at least 3-1/2 full threads in the m
