1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1022 Line Isolation Monitors STANDARD FOR SAFETYUL 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 Line Isolation Monitors, UL 1022 Fifth Edition, Dated April 16, 2012 SUMMARY OF TOPICS Revision pages have been issued for the Standard for Line Isolation Monitors, UL 1022, to reect the reaffirmation o
3、f the ANSI approval. No changes in requirements have been made. 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 p
4、rovides 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 any special, incidental, consequential, indirect or similar damages, including lo
5、ss 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 exceed the price paid f
6、or 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) resulting from any erro
7、r or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. AUGUST 3, 2016 UL 1022 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL AUGUST 3, 2016 UL 1022 tr2 No Text on This PageUL COPYRI
8、GHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APRIL 16, 2012 (Title Page Reprinted: August 3, 2016) 1 UL 1022 Standard for Line Isolation Monitors First Edition March, 1973 Second Edition July, 1979 Third Edition March, 1994 Fourth Edition June, 19
9、98 Fifth Edition April 16, 2012 This ANSI/UL Standard for Safety consists of the Fifth Edition including revisions through August 3, 2016. The most recent designation of ANSI/UL 1022 as a Reaffirmed American National Standard (ANS) occurred on August 3, 2016. ANSI approval for a standard does not in
10、clude 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 in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. ULs Standards f
11、or 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 2016 UNDERWRITERS LABORATORIES IN
12、C. ANSI/UL 1022-2012 (R2016)UL 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 DISTRIBUTION WITHOUT PERMIS
13、SION 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 5.4 Nonmetallic enclosures
14、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 9.4 Barriers 15 9.5 Bushin
15、gs .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 silencing means .20 11.9 Audible
16、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 PERMISSION FROM UL PERFORM
17、ANCE 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 Temperature Test .31 22 Over
18、load 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 27.1 General .40 27.2
19、 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 Leakage Current Measurem
20、ents 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 MATERIAL NOT AUTHORIZED
21、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 facilities, including i
22、nhalation-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; and b) Installed in an Oth
23、er-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 Code, NFPA 70. 2 General
24、 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. 2.1.2 A component is not re
25、quired 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 accordance with its rating esta
26、blished 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, and shall be used only
27、 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. Values in parentheses are
28、 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 this Standard the follo
29、wing 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 CURRENT The test curren
30、t 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 the total hazard curren
31、t 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 continually check the bala
32、nced 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 threshold level. 3.5 REMOTE IND
33、ICATOR 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) HIGH-VOLTAGE A circuit
34、 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 by a primary battery or
35、 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 REPRODUCTION OR DISTRIBUTION
36、 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 examination and test of the
37、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 functions shall be provid
38、ed 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 partial collapse result
39、ing 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 parts shall not be open to
40、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 application under the provisions
41、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 indicating the section(s) of
42、 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 line isolation monitor
43、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 assembled panel or printed wi
44、ring 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 screws. APRIL 16, 2012 LI
45、NE 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 having a thickness 1/32
46、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. 5.2.2 When threads for the
47、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 a
48、ttached. 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 metal, and a smooth, rounded inlet hole for the conductors, which shall afford protection to the conductors equivalent to that provided
49、 by a standard conduit bushing. Table 5.1 Cast-metal enclosures Use, or dimensions of area involved Minimum thickness Die-cast metal, Cast metal of other than the die- cast type, inches (mm) inches (mm) Area of 24 square inches (154 cm 2 ) or less and having no dimension greater than 6 inches (152 mm) 1/16 1.6 1/8 3.2 Area greater than 24 square inches or having any dimension greater than 6 inches 3/32 2.4 1/8 3.2 At a threaded conduit hole 1/4 6.4 1/4 6.4 At an unthreaded conduit hole 1/8 3.2
