1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1917 Solid-State Fan Speed ControlsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHE
2、R REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Solid-State Fan Speed Controls, UL 1917 Fourth Edition, Dated July 3, 2013 Summary of Topics The new edition dated July 3, 2013 was issued to reect the recent ANSI approval, incorporate minor editorial changes, some
3、 clarications, organizational changes, renumbering changes, and the addition of the Abnormal Switching Test in Clause 27.2. The revised requirements are substantially in accordance with Proposal(s) on this subject dated March 22, 2013. All rights reserved. No part of this publication may be reproduc
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8、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 following the affected item. The prior text for requirements that have been revised and that have a future effective
9、date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. JULY 3, 2013 UL 1917 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JULY 3, 2013 UL 1917 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHO
10、RIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JULY 3, 2013 1 UL 1917 Standard for Solid-State Fan Speed Controls Prior to the rst edition, the requirements for the products covered by this standard were included in the Standard for Electric Industrial Control Equipment, U
11、L 508. First Edition December, 1989 Second Edition February, 1994 Third Edition February, 2003 Fourth Edition July 3, 2013 This ANSI/UL Standard for Safety consists of the Fourth edition including revisions through July 3, 2013. The most recent designation of ANSI/UL 1917 as an American National Sta
12、ndard (ANSI) occurred on July 3, 2013. ANSI approval for a standard does 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 P
13、roposal Request 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 thos
14、e Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2013 UNDERWRITERS LABORATORIES INC. ANSI/UL 1917-2013UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JULY 3, 2013 SOLID-STATE FAN SPEED CONTROLS - UL 1917 2 No Text on
15、 This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .6 2 Glossary .7 3 Components 7 4 Units of Measurement .8 5 Undated References 8 6 General 8 CONSTRUCTION 7 Enclosure 8 7.1 General .8 7.2 Cast metal .9
16、7.3 Sheet metal 9 7.4 Polymeric .10 7.5 Doors and covers .10 7.6 Application of probes 12 7.7 Conduit connection 12 7.8 Bonding 12 7.9 Adjustment opening .13 8 Corrosion Protection .13 8.1 General 13 8.2 Outdoor enclosures 13 9 Mounting 13 9.1 Surface mounted 13 9.2 Wall box mounted .14 10 Direct Pl
17、ug-In Devices .14 11 Switches .16 11.1 General .16 11.2 Dimmers 16 12 Live Parts 16 13 Internal Wiring 17 13.1 General .17 13.2 Routing of internal wiring 17 13.3 Clamps and guides .17 13.4 Insulating bonding and grounding conductors 17 13.5 Splices and connections 18 13.6 Splice insulation 18 14 Su
18、pply Connections Permanently Connected Speed Controls 19 14.1 General .19 14.2 Tapped holes for conduit 19 14.3 Knockouts .19 14.4 Terminals .20 14.5 Field wiring space 21 15 Supply Connections Cord Connected Speed Controls .21 15.1 Cords and plugs .21 15.2 Strain relief 23 15.3 Bushings 24 15.4 Rec
19、eptacles .24 JULY 3, 2013 SOLID-STATE FAN SPEED CONTROLS - UL 1917 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 16 Supply Connections Direct Plug-In Devices 25 17 Spacings 25 17.1 General .25 17.2 Primary circuit spacings .26 17.3 Second
20、ary circuit spacings 26 17.4 Limited energy .27 17.5 Battery power 27 17.6 Insulating barriers 27 18 Separation of Circuits .28 19 Grounding .29 PERFORMANCE 20 General 30 21 Temperature Test .32 22 DC Offset Voltage Test 38 23 Overload Test 38 24 Endurance Test 40 25 Dielectric Voltage-Withstand Tes
21、t .41 26 Short Circuit Test .42 27 Breakdown of Components Test 43 27.1 General breakdown of components test .43 27.2 Abnormal switching test 44 28 Crush Test .45 29 Compression Test 45 30 Deection Test .45 31 Securement of Snap-On Cover Test 46 32 Polymeric Enclosure Conduit Connection Tests 46 32.
22、1 General .46 32.2 Pullout 47 32.3 Torque 47 32.4 Bending .47 32.5 Knockouts .48 33 Abuse Test 49 34 Strain Relief Test .49 35 Push Back Relief Test .49 36 Security of Leads Test 50 37 Terminal Torque Test .50 MANUFACTURING AND PRODUCTION TESTS 38 Dielectric Voltage-Withstand Test .50 39 DC Offset V
23、oltage Test 52 RATINGS 40 General 52 MARKINGS 41 General Markings .53 42 Cautionary and Warning Markings 55 JULY 3, 2013 SOLID-STATE FAN SPEED CONTROLS - UL 1917 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INSTRUCTIONS 43 Details .55 Ap
24、pendix A Standards for ComponentsA1 JULY 3, 2013 SOLID-STATE FAN SPEED CONTROLS - UL 1917 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover solid state speed controls rated 300 volts or less,
25、single phase, intended to be connected to 15 20 ampere branch circuits and intended to be installed in accordance with the National Electrical Code, ANSI/NFPA 70 and used with: a) Fans and blowers that circulate air, such as desk, bracket, ceiling, hassock, pedestal, and utility fans; b) Fans and bl
26、owers that ventilate air, such as attic, wall-insert, ceiling-insert, household hood- and canopy-types, and window fans; c) Evaporative coolers; d) Air-ltering appliances; e) Fan-type deodorizers; and f) Fan-type air fresheners. 1.2 Inductive-type and capacitive-type fan speed controls are also cove
27、red by these requirements. 1.3 These requirements also cover the solid state fan speed control portion of controls which include dimmers for use with lighting xtures. 1.4 Solid state fan speed controls provided with a power supply cord, those intended for permanent connection, and direct plug-in dev
28、ices are also covered by this Standard. 1.5 These requirements do not cover solid state speed controls used with air heaters incorporating fans, heating-ventilating units, or blowers comprising components of such equipment as furnaces, mechanical-refrigeration equipment, air conditioners, or direct
29、current output applications. 1.6 These requirements do not cover solid state speed controls used with fans intended to be: a) Used in hazardous locations as dened in the National Electrical Code, ANSI/NFPA 70; b) Installed over solvents or chemically ammable liquids or vapors; or c) Located in chemi
30、cally corrosive environments. JULY 3, 2013 SOLID-STATE FAN SPEED CONTROLS - UL 1917 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2 Glossary 2.1 For the purpose of this standard the following denitions apply. 2.2 CORD CONNECTED DEVICE A d
31、evice intended for connection to the power source by means of a supply cord. Such a device is intended to be moved for reasons of interchange or realignment of the units of the system. 2.3 FAN, CEILING SUSPENDED A fan intended to be mounted to a ceiling outlet box or ceiling building structure, and
32、whose blades rotate below the ceiling. Popularly called a paddle fan. 2.4 FAN, GENERAL PURPOSE Any fan not considered to be a ceiling-suspended fan or any fan which has a Locked Rotor Current/Full Load Current ratio greater than 1.5. 2.5 FAN SPEED CONTROL, CAPACITIVE-TYPE A fan speed control that us
33、es switchable capacitors to regulate the speed of the motor. 2.6 FAN SPEED CONTROL, INDUCTIVE-TYPE A fan speed control that uses inductors to regulate the speed of the motor. 2.7 FAN SPEED CONTROL, SEMICONDUCTOR-TYPE A fan speed control that utilizes semiconductors to regulate the speed of the motor
34、. See 41.12. 2.8 LEAD CONNECTED DEVICE A device which is intended to be permanently connected to the power source. Such a device is not intended to be moved or realigned once it is installed. 3 Components 3.1 Except as indicated in 3.2, a component of a product covered by this standard shall comply
35、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 component is not required to comply with a specic requirement that: a) Involves a feature or characteristic not required in the applicat
36、ion 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 its rating established for the intended conditions of use. 3.4 Specic components are incomplete in construction features or restricted
37、 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 under those specic conditions. JULY 3, 2013 SOLID-STATE FAN SPEED CONTROLS - UL 1917 7UL COPYRIGHTED MATERIAL NOT AUTHOR
38、IZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4 Units of Measurement 4.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 5 Undated References 5.1 Any undated reference to a code or standard appearing
39、in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. 6 General 6.1 The term speed control as used in this standard refers to a solid-state speed control used with electric fans for non-industrial applications. CONSTRUCTION 7 Enclosure
40、 7.1 General 7.1.1 A speed control shall be provided with a complete enclosure for all live parts and all operating parts other than necessarily exposed operating parts, such as an actuating member. Exception: An open speed control (see 20.4) intended for installation in a wall box is not required t
41、o be provided with a complete enclosure of the eld wiring terminals. 7.1.2 An enclosure of a speed control shall be constructed and assembled so that it has the strength and rigidity necessary to resist the abuses to which it is likely to be subjected, without total or partial collapse resulting in
42、a risk of re, electric shock, or injury to persons due to reduction of spacings, loosening or displacement of parts, or other serious defects. 7.1.3 An enclosure shall be constructed so as to reduce the risk of unintentional contact with enclosed electrical devices, and to provide internal devices w
43、ith protection from specied external conditions. 7.1.4 The enclosure shall be constructed such that the switchplate cover mounting means, such as mounting screws, shall not enter the interior of the speed control. Exception: The mounting means may penetrate the interior of the speed control if the a
44、pplicable evaluations dened in Sections73 6a r eperformed with a screw having a length of 3/8 inch (9.5 mm) in place. 7.1.5 Mechanical protection shall be provided to protect components during and after installation. See Crush Test, Section 28. JULY 3, 2013 SOLID-STATE FAN SPEED CONTROLS - UL 1917 8
45、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 7.2 Cast metal 7.2.1 A cast-metal enclosure shall be at least 1/8 inch (3.2 mm) thick at every point, more than 1/8 inch thick at reinforcing ribs and door edges, and at least 1/4 inch (6.4 mm)
46、 thick at tapped holes for conduit. Exception: Other than at plain or threaded conduit holes, malleable iron and die-cast or permanent mold cast aluminum, brass, bronze, or zinc shall be: a) At least 3/32 inch (2.4 mm) thick for an area greater than 24 square inches (155 cm 2 )o r having any dimensi
47、on more than 6 inches (152 mm); and b) At least 1/16 inch (1.6 mm) thick for an area of 24 square inches or less having no dimension more than 6 inches. The area considered may be bounded by reinforcing ribs subdividing a larger area. 7.3 Sheet metal 7.3.1 The thickness of a sheet-metal enclosure sh
48、all not be less than that specied in Tables 7.1 and 7.2, except that at points to which a wiring system is to be connected, uncoated steel shall be at least 0.032 inch (0.81 mm) thick, zinc-coated steel at least 0.034 inch (0.86 mm) thick, and nonferrous metal at least 0.045 inch (1.14 mm) thick. Ex
49、ception: Enclosure thickness at points other than where a wiring system is to be connected need not comply with these thickness requirements if the enclosure complies with the requirements in Sections 29 and 30. 7.3.2 Tables 7.1 and 7.2 are based on a uniform deection of the enclosure surface for any given load concentrated at the center of the surface regardless of metal thickness. Table 7.1 Thickness of sheet metal for enclosures carbon steel or stainless steel Maximum width a Maxim
