UL 705-2017 UL Standard for Safety Power Ventilators (Seventh Edition Reprint with revisions through and including February 13 2018).pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 705 Power Ventilators STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR

2、FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Power Ventilators, UL 705 Seventh Edition, Dated July 19, 2017 Summary of Topics The new edition of UL 705 is being issued to incorporate the following changes in requirements: Separation of Circuits The new a

3、nd revised requirements are substantially in accordance with Proposal(s) on this subject dated April 21, 2017. 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

4、 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. In no event will UL be liable for any special, incidental, consequen

5、tial, 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 advised of the possibility of such damage. In no event shall ULs liabil

6、ity 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 any loss, expense, liability, damage, claim, or judgment (including rea

7、sonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. JULY 19, 2017 UL 705 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JULY 19, 20

8、17 UL 705 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL July 19, 2017 1 UL 705 Standard for Power Ventilators First Edition December, 1966 Second Edition July, 1972 Third Edition November, 1977 Fourth Edition Decemb

9、er, 1984 Fifth Edition June, 1994 Sixth Edition January, 2004 Seventh Edition July 19, 2017 The First through Third editions were titled Power Roof Ventilators. This ANSI/UL Standard for Safety consists of the Seventh Edition. The most recent designation of ANSI/UL 705 as an American National Standa

10、rd (ANSI) occurred on July 19, 2017. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, and Title Page. The Department of Defense (DoD) has adopted UL 705 on February 5, 1993. The publication of revised pages or a new edition of this Standard will not invalidate the DoD

11、 adoption. 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 https:/. ULs Standards for Safety are copyrighted by UL. Neither a p

12、rinted 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 2017 UNDERWRITERS LABORATORIES INC. ANSI/UL 705-2017UL COPYRIGHTED MATERIAL N

13、OT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JULY 19, 2017 POWER VENTILATORS - UL 705 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .7 2 Glossary .8 3

14、 Units of Measurement 10 4 Undated References .10 CONSTRUCTION 5 Components 10 5.1 General 10 5.2 Connectors and terminals 11 5.3 Electrical enclosures and raceways 12 5.4 Overcurrent protection .12 5.5 Power supplies 13 5.6 Supplemental insulation, insulated bushings, and assembly aids 13 6 Frame a

15、nd Enclosure 14 6.1 General 14 6.2 Non-metallic enclosures 18 6.3 Non-metallic parts other than enclosures .18 6.4 Flame spread and smoke developed requirements for non-metallic enclosures and other parts of permanently connected equipment .19 6.5 Accessibility of moving parts 20 7 Mechanical Assemb

16、ly 23 8 Protection Against Corrosion 25 9 Power-Supply Connections 27 10 Current-Carrying Parts 30 11 Internal Wiring 30 12 Separation of Circuits .33 13 Insulating Material 34 14 Motors .35 14.1 General .35 14.2 Enclosure .35 14.3 Protection .35 15 Grounding .38 16 Switches and Controllers 38 17 Ca

17、pacitors .40 18 Receptacles 41 19 Spacings 41 20 Clearance and Creepage Distances .43 21 Filters .43 PERFORMANCE 22 Starting Current Test 43 23 Input Test 44 24 Temperature Test .44 25 Undervoltage Test 50 26 Dielectric Voltage-Withstand Test .50 27 Water Spray Test .50 JULY 19, 2017 POWER VENTILATO

18、RS - UL 705 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 28 Metallic Coating Thickness Test 53 29 Capacitor Tests .54 29.1 Burnout on electrolytic capacitor .54 29.2 Leakage current 55 30 Overload Test Switch or Control 55 31 Permanence

19、of Marking Tests 55 31.1 General .55 31.2 Oven-aging test 56 31.3 Immersion test .56 31.4 Standard-atmosphere test .56 31.5 Unusual condition exposure test .56 31.6 Outdoor exposure test 57 32 Bonding Connection Test 57 33 Controls End Product Test Parameters 57 33.1 General .57 33.2 Auxiliary contr

20、ols .57 33.3 Operating controls (regulating controls) .57 33.4 Protective controls (limiting controls) 59 MANUFACTURING AND PRODUCTION TEST 34 Production Dielectric Voltage-Withstand Test .60 RATING 35 Details .62 MARKING 36 Details .63 SUPPLEMENT SA - DRYER EXHAUST DUCT POWER VENTILATORS (DEDPV) FO

21、R SINGLE RESIDENTIAL DRYERS INTRODUCTION SA1 Scope SA1 SA2 Glossary SA1 CONSTRUCTION SA3 General SA1 PERFORMANCE SA4 General SA5 SA5 Temperature (Normal) SA5 SA6 Humidity Conditioning SA5 SA7 Operation of Controller and Interlock .SA6 SA8 Minimum and Maximum Air Velocity .SA8 JULY 19, 2017 POWER VEN

22、TILATORS - UL 705 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SA9 Operation of Audible Alarm or Visual Error Indicator Test for Controllers and Shut-Down for Interlocking Device .SA9 SA10 High Temperature Turn Off .SA10 SA11 Static Load

23、 Test .SA11 SA12 Sound Output Measurement Test .SA11 SA13 Lint Test SA12 SA14 Strain-Relief Test SA13 SA15 Push Back Relief Test .SA13 SA16 Leakage Current Test SA14 MARKING SA17 Details .SA16 INSTRUCTIONS SA18 Instruction Manual .SA17 SUPPLEMENT SB - UL 60335-1 BASED REQUIREMENTS FOR THE EVALUATION

24、 OF ELECTRONIC CIRCUITS INTRODUCTION SB1 Scope SB1 SB2 General SB1 CONSTRUCTION SB3 Components SB3 SB3.1 Capacitors .SB3 SB3.2 Isolation devices SB3 SB3.3 Printed wiring boards SB4 SB3.4 Switch mode power supplies .SB4 SB4 Identication of Safety Critical Circuit Functions .SB4 SB4.1 General SB4 SB4.

25、2 Protective electronic circuits SB5 SB4.3 Operating circuits that mitigate a dangerous malfunction of the appliance SB5 SB5 Evaluation of the Different Types of Electronic Circuits .SB5 SB5.1 All types of circuits SB5 SB5.2 Circuits that provide safety critical functions SB6 PERFORMANCE SB6 General

26、 Conditions for the Tests SB6 SB6.1 Details .SB6 SB6.2 Intentionally weak parts SB7 SB6.3 Test results determined by overcurrent protection operation SB7 SB7 Low-Power Circuit Determination SB8 SB8 Abnormal Operation and Fault Tests .SB9 SB9 Programmable Component Reduced Supply Voltage Test .SB11 J

27、ULY 19, 2017 POWER VENTILATORS - UL 705 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SB10 Electromagnetic Compatibility (EMC) Requirements Immunity .SB11 MANUFACTURING AND PRODUCTION LINE TESTING SB11 General SB12 APPENDIX A Examples of

28、Controls Performing as Operating or Protective Controls (Informative) JULY 19, 2017 POWER VENTILATORS - UL 705 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover power ventilators of the roof-a

29、nd wall-mounted types and duct fans of the straight-through type intended for commercial or industrial use, residential fans intended for heated and conditioned air and for connection to permanently installed wiring systems in accordance with the National Electrical Code, NFPA 70. 1.2 These requirem

30、ents also cover dryer exhaust duct power ventilators (DEDPV) for single residential dryers. 1.3 These requirements do not cover the following: a) Ventilating equipment such as attic, wall-insert, ceiling-insert, household hood, window fans, or canopy fans or blowers; b) Air-moving equipment with int

31、egral air-tempering means; c) Dryer type fans used for drying carpets or oors; d) Household and commercial blower inator type fans; e) Evaporative coolers; Evaporative cooler pumps, including retrot pumps; f) Air ltering appliances; g) Deodorizers and air fresheners; h) Component fans; i) Low voltag

32、e component fans; j) Fans and blowers that circulate air, such as desk, ceiling-suspended, and hassock fans; k) Ventilators rated more than 600 volts; l) Ventilators employing universal motors rated more than 250 volts; m) Air heaters equipped with fans; n) Draft fans for furnaces; o) Heating-ventil

33、ating units; p) Blowers employed as components in equipment such as furnaces, mechanical-refrigeration equipment, or air conditioners; q) Fusible links and similar equipment that may be provided to disconnect a fan or close shutters in the event of re; JULY 19, 2017 POWER VENTILATORS - UL 705 7UL CO

34、PYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL r) Ventilators specically intended for use in exhausting any of the following: gases other than air, atmospheres causing corrosion to the ventilator, air with water spray, or ammable vapors; or s) V

35、entilators for the removal or conveyance of dust, stock, or refuse. t) Microwaves, ventilating and otherwise; and u) Ducted and non-ducted heat recovery units. 2 Glossary 2.1 For the purpose of this standard, the following denitions apply. 2.2 CAPACITOR, CLASS X Capacitor or RC unit of a type suitab

36、le for use in situations where failure of the capacitor or RC unit would not lead to danger of electrical shock but could result in a risk of re. Examples would be units connected phase to phase or phase to neutral. Note 1 X1 capacitors are generally used in circuits of permanently connected applian

37、ces. However, if the appliance is provided with a separate surge protective device that limits the impulse voltage to 2.5KV, an X2 capacitor is permitted. Note 2 X2 capacitors are generally used in circuits of cord-connected appliances. 2.3 CAPACITOR, CLASS Y Capacitor or RC unit of a type suitable

38、for use in situations where failure of the capacitor could lead to danger of electric shock. Examples would be capacitors connected across the primary and secondary circuits where electrical isolation is required to prevent an electric shock or between hazardous live parts and accessible parts. Note

39、 1 Y1 capacitors are used in circuits where the prevention of electric shock is afforded solely by the isolation provided by the capacitor. Two Y2 capacitors connected in series is considered to provide the same level of protection as one Y1 capacitor. Note 2 Y2 capacitors are used where the prevent

40、ion of electric shock is provided by the combination of the capacitor and earth ground for circuits operating at voltages 150V and 300V. Note 3 Y4 capacitors are used where the prevention of electric shock is provided by the combination of the capacitor and earth ground for circuits operating at vol

41、tages 150V. 2.4 CIRCUIT, CLASS2A nl o wvoltage circuit with a power of 100 VA or less; or has 30 V dc supplied by a primary battery; or is supplied by a Class 2 transformer; or is supplied by a combination of a transformer and xed impedance that, as a unit, complies with all the performance requirem

42、ents for a Class 2 transformer, or is supplied by a power supply (such as a switching power supply) whose output meets the requirements of a Class 2 circuit. A circuit that is derived from a circuit that exceeds 30 V by connecting resistance or impedance, or both, in series with the supply circuit t

43、o limit the voltage and current, is not considered to be a class 2 circuit. 2.5 CIRCUIT, LOW-VOLTAGE A circuit that has an ac potential of not more than 30 V rms (42.4 V peak or 30 V dc). JULY 19, 2017 POWER VENTILATORS - UL 705 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DIS

44、TRIBUTION WITHOUT PERMISSION FROM UL 2.6 CIRCUIT, HAZARDOUS VOLTAGE A circuit of any voltage exceeding those of an low-voltage circuit. 2.7 DUCT FAN A straight-through ventilator provided with anges for connection to a duct and which may be used with heated air. 2.8 FIELD WIRING TERMINAL A terminal

45、to which a wire may be connected in the eld, unless the wire and a means of making the connection such as a pressure terminal connector, soldering lug, soldered loop, or crimped eyelet that is factory assembled to the wire or provided as part of the ventilator. 2.9 MOTORS a) Open Motor A motor havin

46、g ventilating openings that permit passage of external cooling air over and around the windings of the motor. b) Totally Enclosed Motor A motor that is enclosed so as to prevent the free exchange of air between the inside and outside of the case but not sufficiently enclosed to be termed airtight. c

47、) Totally Enclosed Fan-Cooled Motor A totally enclosed motor with external cooling by a fan or fans integral with the motor but external to the enclosing parts. d) Electronically Commutated Motor (ECM) A motor assembly consisting of the motor and a control. The control provides an AC electric signal

48、 (typically non-sinusoidal) to the motor by an inverter/switching power supply. The sensors and other electronics on the control adjust waveform and output levels of the signal. The control is often used to provide protective functions to prevent overheating or mitigate other hazardous conditions. 2

49、.10 POWER VENTILATOR An air-moving appliance consisting of an impeller which may be of the centrifugal, axial, or propeller type and an integral driver. A power ventilator is: a) Installed in a weather-resisting base intended to t, usually by a curb, over a wall or roof opening; or b) Provided with anges for connection to a duct. 2.11 SAFETY CRITICAL FUNCTION Control, protection and monitoring functions which are being relied upon to reduce the risk of re, elect