1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL 353Limit ControlsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDIST
2、RIBUTION WITHOUT PERMISSION FROM ULUL Standard for Safety for Limit Controls, UL 353Fifth Edition, Dated September 23, 1994Summary of TopicsThese revisions to UL 353 are being issued to revise the requirements covering surge protectivedevices in Section 3A.Text that has been changed in any manner or
3、 impacted by ULs electronic publishing system is markedwith a vertical line in the margin. Changes in requirements are marked with a vertical line in the marginand are followed by an effective date note indicating the date of publication or the date on which thechanged requirement becomes effective.
4、The new/revised requirements are substantially in accordance with Proposal(s) on this subject datedAugust 26, 2011.All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, ortransmitted in any form by any means, electronic, mechanical photocopying, recording,
5、 or otherwisewithout prior permission of UL.UL provides this Standard as is without warranty of any kind, either expressed or implied, including butnot limited to, the implied warranties of merchantability or fitness for any purpose.In no event will UL be liable for any special, incidental, conseque
6、ntial, indirect or similar damages,including loss of profits, lost savings, loss of data, or any other damages arising out of the use of or theinability to use this Standard, even if UL or an authorized UL representative has been advised of thepossibility of such damage. In no event shall ULs liabil
7、ity for any damage ever exceed the price paid forthis Standard, regardless of the form of the claim.Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold ULharmless from and against any loss, expense, liability, damage, claim, or judgment (including reason
8、ableattorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronicStandard on the purchasers computer system.The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, figures,and/or other elements of the Standard ha
9、ving future effective dates as indicated in the note following theaffected item. The prior text for requirements that have been revised and that have a future effective dateare located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice.NOVEMBER 8, 2011 UL 353 tr1UL COPYRIGHTED
10、MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNOVEMBER 8, 2011 UL 353tr2No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULSEPTEMBER 23, 1994(Title Page Reprinted: November 8, 2011)1
11、UL 353Standard for Limit ControlsFirst Edition July, 1970Second Edition August, 1971Third Edition December, 1974Fourth Edition March, 1989Fifth EditionSeptember 23, 1994This UL Standard for Safety consists of the Fifth Edition including revisionsthrough November 8, 2011.The Department of Defense (Do
12、D) has adopted UL 353 on January 27, 1992.The publication of revised pages or a new edition of this Standard will notinvalidate the DoD adoption.Comments or proposals for revisions on any part of the Standard may besubmitted to UL at any time. Proposals should be submitted via a ProposalRequest in U
13、Ls On-Line Collaborative Standards Development System (CSDS)at http:/.ULs Standards for Safety are copyrighted by UL. Neither a printed nor electroniccopy of a Standard should be altered in any way. All of ULs Standards and allcopyrights, ownerships, and rights regarding those Standards shall remain
14、 thesole and exclusive property of UL.COPYRIGHT 2011 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNOVEMBER 8, 2011LIMIT CONTROLS - UL 3532No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER R
15、EPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .52 General 62.1 Units of measurement .62.2 Components .63 Glossary .6CONSTRUCTION3A Components .6B3A.1 General .6B3A.2 Attachment plugs, receptacles, connectors, and terminals 73A.3 Batteries and battery chargers 83A.4
16、 Electrical boxes and raceways .8A3A.5 Capacitors and filters .8A3A.5A Surge Protective Devices 8A3A.6 Gaskets and seals .8D3A.7 Insulation systems .8D3A.8 Overcurrent protection 8D3A.9 Marking and labeling systems .8E3A.10 Power supplies .8E3A.11 Printed wiring boards 8E3A.12 Semiconductors 8F3A.13
17、 Supplemental insulation, insulating bushings, and assembly aids .8F3A.14 Valves (electrically operated) and solenoids 8F4 General 8G4A Safety Related Software 94B Electronic Controls .95 Materials 106 Frame and Enclosure 106.1 General 106.1A Polymeric materials and enclosures 136.2 Accessibility of
18、 live parts .136.3 Covers and doors .156.4 Openings .167 Corrosion Protection .178 Insulating Material .189 Field Wiring Connections .199.1 General 199.2 Terminals .20A9.3 Wiring space 22A10 Current-Carrying Parts .22A11 Internal Wiring 22A12 Grounding .2313 Protection of Users and Service Personnel
19、 2714 Transformers .2915 Fuseholders 3016 Switches .3017 Coil Windings and Film-Coated Wire (Magnet Wire) .30ANOVEMBER 8, 2011 LIMIT CONTROLS - UL 353 2AUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL18 Spacings .30A18.1 General 30A18.2 High-
20、voltage circuits .30A18.3 Low-voltage circuits .3219 Alternate Spacings Clearances and Creepage Distances 3320 Separation of Circuits .3320.1 General .3320.2 Barriers .3421 Calibration Means 3422 Mounting 3423 Operating Mechanism .3524 Adjustment and Stops .3525 Reset Mechanism .35PERFORMANCE26 Gene
21、ral Tests 3627 Input Test 3728 Temperature Test .3728.1 General .3728.2 Temperature test of temperature control for air or other gas .4028.3 Temperature test of temperature control for liquids .4128.4 Temperature test of steam pressure or boiler water-level limit control .4128.5 Temperature test of
22、stack-mounted control 4229 Operation Tests 4429.1 General .4429.2 Test of immersion-type temperature-operated control .4629.3 Test of surface-mounted temperature-operated control for hot-water heating systems .4629.4 Test of pressure-operated control 4629.5 Test of electromagnet .4730 Overload Test
23、4731 Endurance Test 5031A Failure Mode Effect Analysis (FMEA) Procedures .5231B Mains Borne Perturbations, Magnetic and Electromagnetic Disturbances .52A31B.1 General 52A31B.2 Voltage dips and interruptions .52B31B.3 Ramp voltage tests 52C31B.4 Voltage/current surge tests .52C31B.5 Ring wave test 52
24、D31B.6 Electrostatic discharge tests 52D31B.7 Radiated electromagnet field test 52E31C Thermal Cycling Test for Electronic Devices .52E32 Dielectric Voltage-Withstand Test 52F33 Volt-Ampere Capacity Test .5334 Burnout Test .5335 Short Circuit Test .5436 Leakage Test 5537 Strength of Parts Test .5638
25、 Parts Containing Liquid Metal .56A39 10-Day Moist Ammonia Air Stress Cracking Test .5740 Push-In Terminals Test 5840.1 Pullout test 5840.2 Temperature test .58NOVEMBER 8, 2011LIMIT CONTROLS - UL 3532BUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION F
26、ROM UL41 Volume Change Test 59NOVEMBER 8, 2011 LIMIT CONTROLS - UL 353 2CUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNOVEMBER 8, 2011LIMIT CONTROLS - UL 3532DNo Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTI
27、ON ORDISTRIBUTION WITHOUT PERMISSION FROM UL42 Weight Loss Test .60MANUFACTURING AND PRODUCTION TESTS43 General 60RATING44 Rating .60MARKING45 General Marking 6146 Cautionary Markings 6347 Markings (Visibility and Permanence) .6347.1 General .6347.2 Oven-aging test 6447.3 Immersion test .6447.4 Stan
28、dard-atmosphere test .6447.5 Unusual-condition exposure test .65INSTRUCTIONS48 Installation Instructions 65SUPPLEMENT SA - SOFTWARE IN PROGRAMMABLE COMPONENTSSA1 Application of Requirements SA1SA2 General SA11A General .SA1SA3 Qualification of Design, Implementation, and Verification Tools SA1SA4 Me
29、asures to Address Microelectronic Hardware Failure Modes SA2SA5 Documentation SA2SA6 Identification SA2APRIL 22, 2011 LIMIT CONTROLS - UL 353 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULThis page intentionally left blank.JUNE 30, 2009LIMI
30、T CONTROLS - UL 3534UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 These requirements cover limit controls, furnace fan controls, and other interlocks which areessentially switches responding to changes in liquid level,
31、 pressure, or temperature. Although not limitedto such specific applications, these safety controls include those intended primarily to safeguard heatingappliances, heating systems, processing systems, and air-conditioning and ventilating systems.1.2 These requirements do not cover thermal protector
32、s for motors and fluorescent-lamp ballasts.1.3 These controls are for use in ordinary locations. Requirements for the installation and use of limitcontrols are included in Standards of the National Fire Protection Association, such as those forInstallation of:Air-Conditioning and Ventilating Systems
33、, NFPA 90A-1993,Warm-Air Heating and Air-Conditioning Systems, NFPA 90B-1993,Oil-Burning Equipment, NFPA 31, ANSI Z95.1-1993,National Fuel Gas Code, NFPA 54-1990,Ovens and Furnaces, NFPA 86-1990, andPrevention of Furnace Explosions in Fuel Oil and Natural Gas-Fired Watertube Boiler FurnacesWith One
34、Burner, NFPA 85C-1991.1.4 These requirements cover equipment rated not more than 600 volts and intended for installation inaccordance with the requirements of the National Electrical Code, ANSI/NFPA 70.1.5 A product that contains features, characteristics, components, materials, or systems new or di
35、fferentfrom those covered by the requirements in this standard, and that involves a risk of fire or of electric shockor injury to persons shall be evaluated using appropriate additional component and end-productrequirements to maintain the level of safety as originally anticipated by the intent of t
36、his standard. Aproduct whose features, characteristics, components, materials, or systems conflict with specificrequirements or provisions of this standard does not comply with this standard. Revision of requirementsshall be proposed and adopted in conformance with the methods employed for developme
37、nt, revision, andimplementation of this standard.1.5 revised April 30, 2001APRIL 22, 2011 LIMIT CONTROLS - UL 353 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL2 General2.1 Units of measurement2.1.1 Values stated without parentheses are the
38、 requirement. Values in parentheses are explanatory orapproximate information.2.1.1 revised April 30, 20012.2 Components2.2 deleted April 22, 20112.2.1 deleted April 22, 2011.2.2.2 deleted April 22, 2011.2.2.3 deleted April 22, 2011.2.2.4 deleted April 22, 2011.3 Glossary3.1 For the purpose of this
39、standard, the following definitions apply.3.1A COMPONENT A device or fabricated part of the control covered by the scope of a safetystandard dedicated to the purpose. When incorporated in a control, equipment otherwise typically fieldinstalled (e.g. luminaire) is considered to be a component. Unless
40、 otherwise specified, materials thatcompose a device or fabricated part, such as thermoplastic or copper, are not considered components.3.1A added April 22, 20113.2 CONTROL, FAN An automatic control responsive to changes in temperature, intended to controlthe operation of the fan on forced air appli
41、ances.3.3 CONTROL, LIMIT An automatic safety control responsive to changes in liquid level, pressure, ortemperature and normally set beyond the operating range for limiting the operation of the controlledequipment.3.4 CONTROL, OPERATING A control, other than a safety control or interlock to start or
42、 regulateappliances according to load demand and to stop or regulate output on satisfaction of demand or uponreaching normal temperature or pressure in the appliances. Operating controls may also actuateauxiliary equipment.3.5 CONTROL, SAFETY or PROTECTIVE Automatic controls and interlocks (includin
43、g relays,switches and other auxiliary equipment used in conjunction therewith to form a safety-control system)which are intended to prevent unsafe operation of the controlled equipment.3.5 revised April 22, 20113.5A CONTROL, WATER HEATER REGULATING An automatic control responsive to changes intemper
44、ature, intended to regulate the operation of the water heater and provides protective function.3.5A added April 22, 2011APRIL 22, 2011LIMIT CONTROLS - UL 3536UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL3.5B CONTROL, WATER HEATER LIMIT A ma
45、nual type control responsive to changes intemperature, intended to provide protective function of the water heater.3.5B added April 22, 20113.6 ELECTRICAL CIRCUITS:a) High-Voltage Circuit A circuit involving a potential of not more than 600 volts and havingcircuit characteristics in excess of those
46、of a low-voltage or an isolated limited secondary circuit.b) Low-Voltage Circuit A circuit involving a potential of not more than 30 volts alternatingcurrent (ac) 42.4 volts peak or direct current (dc) and supplied by a primary battery or by astandard Class 2 transformer, or by a combination of tran
47、sformer and fixed impedance which,as a unit, complies with all the performance requirements for a Class 2 transformer. (A circuitderived from a source of supply classified as a high-voltage circuit, using resistance in serieswith the supply circuit as a means of limiting the voltage and current, is
48、not considered to be alow-voltage nor an isolated limited secondary circuit.)c) Safety-Control Circuit A circuit involving one or more safety controls.d) Isolated Limited Secondary Circuit A circuit of limited energy derived from an isolatedsecondary winding of a transformer having a maximum capacit
49、y of 100 volt-amperes and open-circuit secondary voltage not exceeding 1000 volts.e) Intrinsically Safe Circuit A circuit involving equipment and wiring which is incapable ofreleasing sufficient electrical energy under normal or abnormal conditions to cause ignition of aspecific hazardous atmospheric mixture. Abnormal conditions include accidental damage to anypart of the equipment or wiring, insulation or other failure of electrical components, applicationof overvoltage, adjustment and maintenance operations, and
