1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULJUNE 26, 20151UL 498BOutline of Investigation for Receptacles with Integral Switching MeansIssue Number: 2June 26, 2015Summary of TopicsThis is the second issue of the Outline of Investigation fo
2、r Receptacleswith Integral Switching Means, UL 498B. This new issue now covers areceptacle with an integral switching means where a Class 2 signalingdevice such as a sensor, timer or energy-management equipment isconnected to the controlled receptacle by a Class 2 separable leadassembly.ULs Outlines
3、 of Investigation are copyrighted by UL. Neither a printed norelectronic copy of an Outline of Investigation should be altered in any way. All ofULs Outlines of Investigation and all copyrights, ownerships, and rights regardingthose Outlines of Investigation shall remain the sole and exclusive prope
4、rty of UL.COPYRIGHT 2015 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULJUNE 26, 2015UL 498B2No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION F
5、ROM ULCONTENTSINTRODUCTION1 Scope .62 Components 73 Units of Measurement 74 Undated References 85 Glossary 8CONSTRUCTION6 General 117 Configurations 118 Accessibility of Live Parts 119 Current-Carrying Parts .1310 Internal Wiring .1311 Internal Splices and Connections 1311.1 General .1311.2 Wire-wra
6、pped connections 1411.3 Wiring terminals and leads 1512 Separation of Circuits .1513 Insulating Material 1714 Printed-Wiring Boards 1715 Components .1815.1 Switching devices 1815.2 Capacitors .1815.3 Power-switching semiconductors .1915.4 Isolation devices .1916 Transformers 1916.1 General .1916.2 I
7、solation transformers .2017 Spacings 2118 Alternate Spacings Clearances and Creepage Distances 2319 Bonding of Internal Parts for Grounding .2420 Class 2 Circuits 2421 Class 2 Separable Lead Assembly 27PERFORMANCE22 General .2823 Temperature Test 2823.1 General .2823.2 Operation .2923.3 Temperature
8、measurements .3024 DC Offset Voltage Test .3125 Abnormal Operation Test .3125.1 Motor .3125.2 Component failure 3225.3 Abnormal switching test .3326 Limited Power Point Determination Test 3426.1 General .34JUNE 26, 2015 UL 498B 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTR
9、IBUTION WITHOUT PERMISSION FROM UL26.2 Option No. 1 .3426.3 Option No. 2 .3526.4 Component failure 3626.5 Overload test 3727 Isolation Tests 3827.1 General .3827.2 Pulse transformer burnout tests 3827.3 Optical isolator tests 4027.4 Component failure 4028 Power-Switching Semiconductors 4128.1 Genera
10、l .4128.2 Overload test 4228.3 Endurance 4329 Voltage Surge Test .4430 Power Supplies Short circuit 4631 Component Failure Test .4732 Electronic Component Evaluation 4733 Dielectric Voltage-Withstand Test .4833.1 General .4833.2 Primary circuits 4833.3 Isolated secondary circuits 4933.4 Transformers
11、 50MANUFACTURING AND PRODUCTION LINE TESTS34 DC Offset Voltage Test 51RATING35 Details .5135.1 Input 5135.2 Output 5135.3 Operational ambient temperature .52MARKINGS36 General 5237 Installation Instructions 53SUPPLEMENT SA - RECEPTACLES WITH INTEGRAL SWITCHING MEANS INTENDED FORENERGY MANAGEMENT AND
12、 BUILDING AUTOMATIONINTRODUCTIONSA1 Scope .SA1CONSTRUCTIONSA2 General SA1SA3 Electrical Rating SA1JUNE 26, 2015UL 498B4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULPERFORMANCESA4 General SA2SA5 Overload Test .SA2SA6 Endurance Test .SA4RATIN
13、GSA7 Details .SA7SA7.1 Input .SA7SA7.2 Output .SA8MARKINGSSA8 Details .SA8INSTALLATION INSTRUCTIONSSA9 General .SA11APPENDIX AStandards for ComponentsA1JUNE 26, 2015 UL 498B 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1
14、.1 These requirements cover a receptacle with integral switching means rated 600 V or less, used inordinary dry locations and intended for connection to a branch circuit in accordance with the NationalElectrical Code, NFPA 70.1.2 A receptacle with integral switching means covered by this Outline sha
15、ll meet the followingrequirements:a) No voltage greater than 600 V above ground will be present in the device,b) An isolation transformer, if provided, will generally furnish power at a lower potential than theprimary voltage; andc) The output of the device will not be located in a circuit operating
16、 at greater than 600 Vabove ground.d) The switching device shall be integral to the receptacle.e) A receptacle that is marked with the symbol shown in Table SA8.1 Reference No. 2 anddoes not employ an integral switching means intended for energy management and buildingautomation, are covered by the
17、Standard for Attachment Plugs and Receptacles, UL 498.1.3 This Outline does not directly apply to, but may supplement the following standards:a) Devices produced integrally with flexible cord or cable, covered by the Standard for CordSets and Power-Supply Cords, UL 817;b) Current taps and adapters c
18、overed by the Standard for Current Taps and Adapters, UL498A;c) Devices employing male or female screwshells, covered by the Standard for Lampholders,UL 496;d) Single and multipole connectors intended for factory assembly to copper or copper alloyconductors or printed wiring boards for use in data,
19、signal, control and power applications withinand between electrical equipment, covered by the Standard for Component Connectors forData, Signal, Control and Power Applications, UL 1977;e) Devices intended for installation and use in hazardous (classified) locations in accordancewith the National Ele
20、ctrical Code, NFPA 70, covered by the Standard for Explosion-Proof andDust-Ignition-Proof Equipment for Use in Hazardous (Classified) Locations, UL 1203;f) Devices intended for use with telecommunications networks, covered by the Standard forInformation Technology Equipment Safety Part 1: General Re
21、quirements, UL 60950-1, orthe Standard for Communications Circuit Accessories, UL 1863;g) Devices incorporating ground-fault circuit interruption circuitry, covered by the Standard forGround-Fault Circuit Interrupters, UL 943;JUNE 26, 2015UL 498B6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER RE
22、PRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULh) Direct plug-in devices incorporating transient voltage surge suppression circuitry, covered bythe Standard for Surge Protective Devices, UL 1449;i) Direct plug-in devices incorporating electromagnetic interference filter circuitry, covered by th
23、eStandard for Electromagnetic Interference Filters, UL 1283;j) Cord-connected, relocatable power taps intended only for indoor use as a temporaryextension of a grounding alternating-current branch circuit for general use, covered by theStandard for Relocatable Power Taps, UL 1363.k) Energy managemen
24、t equipment covered by the Standard for Energy ManagementEquipment, UL 916.2 Components2.1 Except as indicated in 2.2, a component of a product covered by this Outline shall comply with therequirements for that component. See Appendix A for a list of standards covering components generallyused in th
25、e products covered by this Outline.2.2 A component is not required to comply with a specific requirement that:a) Involves a feature or characteristic not required in the application of the component in theproduct covered by this Outline; orb) Is superseded by a requirement in this Outline.2.3 A comp
26、onent shall be used in accordance with its rating established for the intended conditions ofuse.2.4 Specific 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 n
27、otexceeding specified limits, and shall be used only under those specific conditions.3 Units of Measurement3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory orapproximate information.3.2 Unless indicated otherwise, voltage and current values specified i
28、n this Outline are rms, and wattagevalues are average power.JUNE 26, 2015 UL 498B 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL4 Undated References4.1 Any undated reference to a code or standard appearing in the requirements of this Outlin
29、e shall beinterpreted as referring to the latest edition of that code or standard.5 Glossary5.1 For the purpose of this Outline the following definitions apply:5.2 CLASS 2 CIRCUIT An isolated secondary circuit involving a potential of not more than 42.4 Vpeak supplied by:a) An inherently-limited Cla
30、ss 2 transformer;b) A combination of an isolated transformer secondary winding and a fixed impedance orregulating network that together comply with the performance requirements for an inherently-limited Class 2 transformer;c) A dry-cell battery having output characteristics not greater than those of
31、 an inherently-limitedClass 2 transformer;d) Any combination of (a), (b), and (c) that together comply with the performance requirementsfor an inherently-limited Class 2 transformer; ore) One or more combinations of a Class 2 transformer and an overcurrent protective devicethat together comply with
32、the performance requirements for a noninherently-limited Class 2transformer.A circuit derived from a line-connected circuit by connecting impedance in series with the supplycircuit as a means of limiting the voltage and current is not a Class 2 circuit. See Class 2Circuits, Section 20.5.3 CLASS 2 SE
33、PARABLE LEAD ASSEMBLY Consists of a factory-made, power-limited cableassembly provided with a connector, intended for Class 2 signaling between a device such as a sensor,timer or energy-management equipment and a wired controlled receptacle.5.4 CONFORMAL COATING An insulating coating which conforms
34、to the configuration of the objectcoated and is used as a protective covering against environmental conditions or when electricalspacings are insufficient.5.5 CONTROLLED ENVIRONMENT An environment:a) Relatively free of conductive contaminants, such as normal cooking vapors, carbon dust, andsimilar c
35、ontaminants, which are a result of the end-use product in which a control will beinstalled or due to the location of the end-use product, andb) Not subject to humidity and the formation of condensation. A controlled environment isprovided, for example, by means of a:1) Hermetically sealed enclosure;
36、2) Encapsulation;JUNE 26, 2015UL 498B8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL3) A conformal coating; or4) A gasketed, tight-fitting enclosure or filter system preventing contamination inconjunction with a system preventing condensatio
37、n for example, the maintaining ofthe surrounding air at constant temperature and a suitably low relative humidity.5.6 DEAD-CASE-MOUNTED SEMICONDUCTOR A semiconductor, such as a triac or silicon-controlled rectifier, employing an integral metal tab or stud that is insulated from live parts.5.7 ELECTR
38、ICAL STRESS FACTOR For a circuit component, the ratio of operating electrical stressto rated electrical stress. Examples include the ratio of operating wattage to maximum rated wattage ofa resistor and operating voltage to maximum rated voltage of a capacitor. A circuit component havingno assigned m
39、aximum operating electrical rating is made the subject of an investigation.5.8 HAZARDOUS ENERGY Circuit energy that involves a risk of fire or electric shock.5.9 ISOLATED SECONDARY CIRCUIT A circuit derived from an isolated secondary winding of atransformer and that has no direct connection back to
40、the line-connected circuit, other than through thegrounding means. A secondary circuit that has a direct connection back to the line-connected circuit isconsidered part of the line-connected circuit.5.10 LIMITED-ENERGY CIRCUIT A line-connected circuit in which the wattage from any point in thecircui
41、t to any return to the power supply is limited to 15 W; or an isolated secondary circuit in which thewattage from any point in the circuit to any return to the power supply is limited to 50 W.5.11 LINE-CONNECTED CIRCUIT A circuit in which the wiring and components are conductivelyconnected to the br
42、anch circuit. It is also called a primary or direct-connected circuit. See also 5.9.5.12 OPPOSITE POLARITY A difference in potential between two points, such that shorting of thesetwo points results in a condition involving an overload; rupturing of printed wiring-board-tracks,components, or fuses;
43、or similar condition.5.13 OPTICAL ISOLATOR (PHOTON-COUPLED ISOLATOR) A circuit-coupling device that providescircuit isolation by means of a light source and sensor integrated into a single package.5.14 SAFETY CIRCUIT A primary or secondary circuit that is relied upon to reduce the risk of fire,elect
44、ric shock, injury to persons, operation of controlled equipment that is capable of resulting in a riskof fire, electric shock, or injury to persons. Examples include an interlock circuit, a circuit which limitsleakage current to accessible parts, a circuit which limits the wattage to a limited-energ
45、y circuit, or aphase control or other circuit designed to limit temperatures in the end-use product to acceptable levels.5.15 THYRISTOR A bistable semiconductor device comprised of three or more junctions that can beswitched from the off state to the on state or vice versa, by means of the controlle
46、d conductivity of thesemiconductor, with such switching occurring within at least one quadrant of the principal voltage-current characteristics. Such switching includes random switching in which conduction occurs at anyphase angle of the alternating current load voltage cycle or regulated switching
47、in which conductionoccurs at some precise phase angle or load-voltage magnitude. A phase-controlled semiconductordevice is one in which the semiconductor conducts for some portion of the load-voltage cycle.a) BIDIRECTIONAL TRIODE THYRISTOR (TRIAC) A three-terminal thyristor havingsubstantially the s
48、ame switching behavior in the first and third quadrants of the principalvoltage-current characteristics.JUNE 26, 2015 UL 498B 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULb) SILICON-CONTROLLED RECTIFIER (SCR) A reverse blocking triode thyr
49、istor. A three-terminal thyristor that conducts only for positive anode-to-cathode voltages and exhibits areverse blocking state for negative anode-to-cathode voltages.5.16 TRANSFORMER The term includes a motor-transformer or an autotransformer. For thepurpose of these requirements, the types of transformers typically encountered in or supplying power tocontrols are:a) Class2Anisolation type transformer as specified in the Standard for Low VoltageTransformers Part 1: General Requirements, UL 5085-1, and the Standard for Low VoltageTr
