1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 698A Industrial Control Panels Relating to Hazardous (Classied) Locations STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSIO
2、N FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Industrial Control Panels Relating to Hazardous (Classied) Locations, UL 698A Third Edition, Dated September 14, 2012 Summary of Topics This revision to ANSI
3、/UL 698A is being issued to reaffirm approval as an American National Standard. No changes in requirements are involved. These requirements are substantially in accordance with Proposal(s) on this subject dated September 30, 2016. The revisions dated December 14, 2016 include a reprinted title page
4、(page 1) for this Standard. Text 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 p
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9、om any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. DECEMBER 14, 2016 UL 698A tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL DECEMBER 14, 2016 UL 698A tr2 No Text on T
10、his PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL September 14, 2012 (Title Page Reprinted: December 14, 2016) 1 UL 698A Standard for Industrial Control Panels Relating to Hazardous (Classied) Locations First Edition April, 1999 Second
11、 Edition May, 2008 Third Edition September 14, 2012 This ANSI/UL Standard for Safety consists of the Third Edition including revisions through December 14, 2016. The most recent designation of ANSI/UL 698A as a Reaffirmed American National Standard (ANS) occurred on December 14, 2016. ANSI approval
12、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 in ULs On-Line Collaborative Standards Development System (CSDS)
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14、UNDERWRITERS LABORATORIES INC. ANSI/UL 698A-2012 (R2016)UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL DECEMBER 14, 2016 UL 698A 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT P
15、ERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .4 2 Undated References 5 3 Units of Measurement .5 4 Glossary .5 5 Application of Requirements6 CONSTRUCTION 6 Barriers 6 7 External Equipment .6 8 Spacings.8 9 Separation of Circuits9 9.1 General .9 9.2 Separation by distance 9 9.3 Separation by part
16、itions 11 10 Ground Terminal13 PERFORMANCE 11 Mechanical Tests .13 MARKINGS 12 Internal Markings .13 13 External Markings.13 INSTALLATION INSTRUCTIONS 14 General14 15 Panel Control Drawing 14 DECEMBER 14, 2016 UL 698A 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION W
17、ITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover industrial control panels intended for general industrial use and installation in unclassied locations with intrinsically safe circuit extensions into the following hazardous (classied) locations in accordance with the Natio
18、nal Electrical Code (NEC), NFPA 70: a) Class I, Division 1; b) Class I, Zone 0 and Zone 1; c) Class II, Division 1; d) Class III, Division 1; and e) Zone 20 and Zone 21. 1.2 The industrial control panels covered by these requirements are not intended for metal working machine tools, plastic injectio
19、n molding, power press controls, ame safety supervision of combustible fuel type equipment, or elevator controls. 1.3 These requirements do not cover electrostatic devices, circuits or systems, gas or vapor analysis equipment or other equipment having a process line brought into an enclosure. 1.4 Th
20、e industrial control panels covered by these requirements are assemblies consisting of components such as motor controllers, overload relays, fused disconnect switches, and/or circuit breakers and related control devices such as pushbutton stations, selector switches, pilot lights, timers, switches,
21、 control relays and the like with associated wiring terminals. In all cases, the enclosure is provided as part of the assembly. 1.5 These requirements cover equipment for use under the following atmospheric conditions: a) An ambient temperature not exceeding 40C (104F); b) An oxygen concentration no
22、t greater than 21 percent by volume; and c) A nominal barometric pressure of one atmosphere. SEPTEMBER 14, 2012 UL 698A 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2 Undated References 2.1 Any undated reference to a code or standard app
23、earing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. 3 Units of Measurement 3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 4 Glossary 4.1 For the pur
24、pose of this Standard, the following denitions apply. 4.2 BARRIER The device that provides the intrinsically safe circuit. 4.3 BARRIER CONTROL DRAWING A drawing or other document provided by the manufacturer of each intrinsically safe barrier used in the panel that details the allowed interconnectio
25、ns to each barrier. 4.4 FIELD WIRING Conductors to be installed by others to connect the industrial control panel to sources of supply, control devices, and loads. 4.5 INTRINSICALLY SAFE CIRCUIT A circuit in which any spark or thermal effect, produced either normally or under specied fault condition
26、s, is incapable of causing ignition of a mixture of ammable or combustible material in air in the mixtures most easily ignitable concentration. 4.6 INTRINSICALLY SAFE INTERNAL WIRING The wiring between the terminal blocks for eld wiring of intrinsically safe circuits and the barrier. 4.7 PANEL CONTR
27、OL DRAWING A drawing or other document provided by the manufacturer of the panel that details each barrier within the panel and the connections to the intrinsically safe electrical equipment in the eld. 4.8 PARTITION A metallic or non-metallic material used to maintain required separation between in
28、trinsically safe and non-intrinsically safe equipment and wiring. 4.9 SIMPLE APPARATUS An electrical component or combination of components of simple construction with well dened electrical parameters that does not generate more than 1.5 volts, 0.1 amperes, and 25 milliwatts or a passive component t
29、hat does not dissipate more than 1.3 watts and is compatible with the intrinsic safety of the circuit which is used. Examples of simple apparatus include passive components such as LEDs, resistors, RTDs, and switches and sources of generated energy such as thermocouples and photocells which do not g
30、enerate more than 1.5 volts, 0.1 amperes and 25 milliwatts. 4.10 Um The maximum voltage (rms, ac, or dc) that can be applied to a non-intrinsically safe connection facilities of the barrier without invalidating the type of protection. SEPTEMBER 14, 2012 UL 698A 5UL COPYRIGHTED MATERIAL NOT AUTHORIZE
31、D FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 5 Application of Requirements 5.1 The industrial control panels covered by this Standard shall be of the enclosed-type and shall comply with the applicable requirements in the Standard for Industrial Control Panels, UL 508A. 5.2 W
32、hen conicting requirements exist, the requirements of this Standard shall supersede the requirements of the Standard for Industrial Control Panels, UL 508A. CONSTRUCTION 6 Barriers 6.1 Barriers shall comply with the following requirements based on the intended area: a) For Division 1 hazardous (clas
33、sied) locations: the Standard for Intrinsically Safe Apparatus and Associated Apparatus for Use in Class I, II, and III, Division 1, Hazardous (Classied) Locations, UL 913. b) For Zone 0 and Zone 1 hazardous (classied) locations: the Standard for Explosive Atmospheres - Part 11: Equipment Protection
34、 by Intrinsic Safety i, UL 60079-11. c) For Zone 20 and Zone 21 hazardous (classied) locations: the Standard for Electrical Apparatus for Use in Zone 20, Zone 21 and Zone 22 Hazardous (Classied) Locations - Protection by Intrinsic Safety iD, ISA-61241-11 (12.10.04)-2006. 6.2 Barriers installed withi
35、n an industrial control panel shall comply with the panel control drawing and barrier control drawing provided by the manufacturer. 6.3 Power to each barrier shall be supplied from an isolating source with an output less than or equal to the rated Um of the barrier as specied on the barrier control
36、drawing. 6.4 A ground fault circuit interrupter shall not be used lieu of the requirements for the barrier as specied in 6.1. 7 External Equipment 7.1 Intrinsically safe equipment, located in a Division 1, Zone 0, Zone 1, Zone 20 or Zone 21 area, that is intended to be connected to a barrier in the
37、panel, shall be limited to simple apparatus. Exception: Connection to intrinsically safe equipment, other than simple apparatus, is not prohibited when the connection complies with the following requirements based on the intended area: a) For Division 1 hazardous (classied) locations: the Standard f
38、or Intrinsically Safe Apparatus and Associated Apparatus for Use in Class I, II, and III, Division 1, Hazardous (Classied) Locations, UL 913. b) For Zone 0 and Zone 1 hazardous (classied) locations: the Standard for Explosive Atmospheres - Part 11: Equipment Protection by Intrinsic Safety i, UL 6007
39、9-11. c) For Zone 20 and Zone 21 hazardous (classied) locations: the Standard for Electrical Apparatus for Use in Zone 20, Zone 21 and Zone 22 Hazardous (Classied) Locations - Protection by Intrinsic Safety iD, ISA-61241-11 (12.10.04)-2006. SEPTEMBER 14, 2012 UL 698A 6UL COPYRIGHTED MATERIAL NOT AUT
40、HORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 7.2 The intrinsically safe equipment shall be clearly specied on the panel control drawing provided by the manufacturer. 7.3 For simple apparatus other than switches, the maximum power (P o ) delivered from the barrier to th
41、e simple apparatus shall not exceed 1.3 W for temperature considerations. The maximum power shall be determined by either a marked value on the barrier or by the following calculation: P o =(V oc I sc ) 4 in which V oc and I sc are per the marked values on the barrier. Exception: The maximum power (
42、P o ) shall not exceed 1.3 W unless the apparatus complies with the following requirements based on the intended areas: a) For Division 1 hazardous (classied) locations: the Standard for Intrinsically Safe Apparatus and Associated Apparatus for Use in Class I, II, and III, Division 1, Hazardous (Cla
43、ssied) Locations, UL 913. b) For Zone 0 and Zone 1 hazardous (classied) locations: the Standard for Explosive Atmospheres - Part 11: Equipment Protection by Intrinsic Safety i, UL 60079-11. c) For Zone 20 and Zone 21 hazardous (classied) locations: the Standard for Electrical Apparatus for Use in Zo
44、ne 20, Zone 21 and Zone 22 Hazardous (Classied) Locations - Protection by Intrinsic Safety iD, ISA-61241-11 (12.10.04)-2006. 7.4 For simple apparatus other than switches, that are provided with the panel or specied on the control drawing, the maximum surface temperature can be determined from the va
45、lues of the output power from the barrier to which it is connected to obtain the temperature class. The temperature class as given in Table 7.1 can be determined by one of the following and shall be provided on the control drawing: 1) The following Table: Total Surface Area Requirement for T4 Classi
46、cation Excluding Lead Wires Less than 20 square mm Surface Temperature less than or equal to 275C (40C ambient) Greater than or equal to 20 square mm Surface Temperature less than or equal to 200C (40C ambient) And less than or equal to 10 square cm Greater than or equal to 20 square mm Power not ex
47、ceeding: 1.3W (40C ambient) 1.2W (60C ambient) 1.0W (80C ambient) 2) Calculation using the formula: T=P o R th +T amb Where: T is the surface temperature; R th is the thermal resistance of the simple apparatus; and SEPTEMBER 14, 2012 UL 698A 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPROD
48、UCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL T amb is the maximum ambient temperature (normally 40C). In addition, components with a surface area smaller than 10 cm 2 (excluding lead wires) may be classied as T5 if their temperature does not exceed 150C (122F). Table 7.1 Temperature Marking Max
49、imum temperature a Temperature Class C (F) 450 (842) T1 300 (572) T2 280 (536) T2A b 260 (500) T2B b 230 (446) T2C b 215 (419) T2D b 200 (392) T3 180 (356) T3A b 165 (329) T3B b 160 (320) T3C b 135 (275) T4 120 (248) T4A b 100 (212) T5 85 (185) T6 a Based on a 40C (104F) or higher marked ambient. b Division 1 area applications only. 8 Spacings 8.1 A minimum spacing of 6 mm (0.25 inch) shall be maintained between the terminals for connection of eld wir
