NEMA LE 6-2014 Procedure for Determining Target Efficacy Ratings for Commercial Industrial and Residential Luminaires.pdf

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1、NEMA Standards PublicationNational Electrical Manufacturers AssociationNEMA LE 6-2014Procedure forDetermining TargetEfficacy Ratings forCommercial, Industrial,and Residential LuminairesNEMA Standards Publication LE 6-2014 Procedure for Determining Target Efficacy Ratings for Commercial, Industrial,

2、and Residential Luminaires Published by: National Electrical Manufacturers Association 1300 North 17th Street, Suite 900 Rosslyn, Virginia 22209 www.nema.org 2014 National Electrical Manufacturers Association. All rights, including translation into other languages, reserved under the Universal Copyr

3、ight Convention, the Berne Convention for the Protection of Literary and Artistic Works, and the International and Pan American copyright conventions. 2014 National Electrical Manufacturers Association NOTICE AND DISCLAIMER The information in this publication was considered technically sound by the

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13、 NEMA LE 6-2014 Page i 2014 National Electrical Manufacturers Association Foreword This standards publication was developed to assist individuals purchasing or designing lighting systems for interior or exterior applications in determining the Target Efficacy Rating (TER) of a lighting product. The

14、TER is intended to be a metric, among many other considerations, to evaluate the energy effectiveness of a lighting installation. Creation of this standards publication was prompted by the need of the luminaire manufacturing industry for a uniform method of determining the energy effectiveness of it

15、s products. The NEMA LE 6-2009 (R2014) standard supersedes the NEMA LE 5, LE 5A, and LE 5B standards for Luminaire Efficacy Ratings (LER). It is not the intent of this standards publication to inhibit luminaire design or to impose arbitrary tolerances on any luminaire manufacturer. Further, it is no

16、t the intent of this standards publication to be used to regulate luminaires, since many other factors related to visibility, color, contrast, glare, uniformity, and other metrics must be considered based on application requirements. The preparation of this standards publication was done by the Lumi

17、naire Section, in close cooperation with the Lamp and Ballast sections of the NEMA Lighting Systems Division. Input of users and other interested parties has been sought and evaluated. Inquiries, comments, and proposed or recommended revisions should be submitted to the Indoor Lighting Section of NE

18、MA by contacting: Vice President, Technical Services National Electrical Manufacturers Association 1300 North 17th Street, Suite 900 Rosslyn, Virginia 22209 This standard was developed by the Luminaire Section. Section approval of the standard does not necessarily imply that all section members vote

19、d for its approval or participated in its development. At the time it was approved, the Luminaire Section was composed of the following members: Acuity Brands Lighting Appleton Group Atlas Lighting Products, Inc. BJB Electric Coleman Cable Cooper Lighting by Eaton Cree, Inc. Deco Lighting EYE Lighti

20、ng International GE Consumer & Industrial Lighting Systems Hubbell Lighting, Inc. Intelligent Illuminations, Inc. Juno Lighting Group by Schneider Electric LumenOptix, LLC MaxLite OSRAM SYLVANIA Inc. Philips Lighting RAB Lighting Satco Product Inc. Thomas & Betts Corporation Venture Lighting Interna

21、tional NEMA LE 6-2014 Page ii 2014 National Electrical Manufacturers Association CONTENTS Page Foreword i Purpose . iii Section 1 GENERAL . 1 1.1 Scope . 1 1.2 Referenced Publications 1 1.3 Definitions 2 Section 2 SELECTION OF COMPONENTS . 4 2.1 Test SpecimenLuminaire . 4 2.2 Test Specimen(S)Ballast

22、s 4 2.3 Test Specimen(S)Lamps . 4 2.4 Test Specimen(S)Solid-State Lighting . 4 Section 3 TESTING FACILITIES AND EQUIPMENT . 5 3.1 Facilities . 5 3.2 General Criteria . 5 Section 4 CALCULATIONS 6 4.1 Target Efficacy Rating . 6 4.2 Luminaire Types and Classifications . 6 4.3 Calculation of Ballast Fac

23、tor for Linear and Compact Fluorescent Lamps 7 4.4 Calculation of Ballast Factor for HID Ballasts 7 4.5 Calculation of Energy Effectiveness Factor . 8 4.5.1 Interior Luminaires . 8 4.5.2 Exterior Luminaires 8 4.6 Sample Calculation of Target Efficacy Rating . 9 4.6.1 Interior Luminaire . 9 4.6.2 Ext

24、erior Luminaire . 10 Section 5 RECOMMENDED REPORTING FORMAT (Example Only) . 11 5.1 Interior Luminaire . 11 5.2 Exterior Luminaire . 11 Appendix A Definitions of Luminaire Types and Classifications . 12 Tables 4-1 Interior Luminaires EEF Calculations 8 4-2 Exterior Luminaires EEF Calculations . 8 Fi

25、gures 4-1 Interior Luminaire TER Calculation, CU Determination . 9 4-2 Exterior Luminaire TER Calculation, CU Determination . 10 NEMA LE 6-2014 Page iii 2014 National Electrical Manufacturers Association Purpose The purpose of this standards publication is to: a) provide the lighting design communit

26、y and procurement officials with a practical and uniform method for calculating a metric to evaluate and compare the “energy effectiveness” of luminaires. b) provide the ability for construction or renovations focused on sustainable design to evaluate the energy performance of luminaires. c) provide

27、 electrical utility companies with a method to establish performance criteria for luminaires for use with energy savings rebate programs. d) provide a methodology for luminaires that considers all components of the luminaire, as well as the effectiveness of the luminaire optics, to deliver light to

28、an intended task. e) define categories for types of luminaire products based on function, physical or dimensional attributes, and optical characteristics of luminaires to enable qualified energy comparisons within a category of product. f) preserve for luminaire manufacturers and the lighting indust

29、ry the right to use laboratory facilities, testing methods, and completed test data that currently exist and are in accordance with approved industry standards. NEMA LE 6-2014 Page iv 2014 National Electrical Manufacturers Association NEMA LE 6-2014 Page 1 2014 National Electrical Manufacturers Asso

30、ciation Section 1 GENERAL 1.1 SCOPE This standards publication provides a procedure for the determination of the Target Efficacy Rating (TER) for luminaires under laboratory test conditions. This standard describes categories or types of product used in common indoor and outdoor lighting application

31、s. This standard does not apply to luminaires for specialized applications, including but not limited to products intended to be aimed, accent luminaires, rough or hazardous use luminaires, or emergency lighting. 1.2 REFERENCED PUBLICATIONS The latest editions and revisions of the following publicat

32、ions are adopted as indicated by reference in this Standards Publication. American National Standards Institute (ANSI) 11 West 42nd Street, 13th Floor New York, NY 10036 ANSI C82.2-2002 Methods of Measurement of Fluorescent Lamp Ballasts ANSI C82.3-2002 Reference Ballasts for Fluorescent Lamps ANSI

33、C82.5-1990 (R1995) High-Intensity Discharge and Low-Pressure Sodium Lamps ANSI C82.6-2005 Ballasts for High-Intensity Discharge LampsMethods of Measurement ANSI C78.81-2005 Double-capped Fluorescent LampsDimensional and Electrical Characteristics ANSI C78.901-2005 Single-Based Fluorescent LampsDimen

34、sional and Electrical Characteristics Illuminating Engineering Society of North America (IESNA) 120 Wall Street, 17th Floor New York, NY 10005-4001 Current versions of the following IESNA Publications apply: IESNA Lighting Handbook LM-66 Single-ended Compact Fluorescent LampsElectrical and Photometr

35、ic Measurements LM-45 Incandescent LampsElectrical Measurements LM-51 High Intensity Discharge (HID) LampsElectrical Measurements LM-46 Photometric Testing of Indoor Luminaires using HID or Incandescent Filament Lamps LM-41 Approved Method for Photometric Testing of Indoor Fluorescent Luminaires NEM

36、A LE 6-2014 Page 2 2014 National Electrical Manufacturers Association LM-79 Electrical and Photometric Measurements of Solid-State Lighting Products 1.3 DEFINITIONS ballast: An auxiliary device used with an electrical discharge lamp(s) to obtain the necessary circuit conditions (voltage, current, an

37、d wave form) for the proper starting and operation of a particular fluorescent or high-intensity discharge (HID) lamp(s) from a particular line voltage and frequency. ballast factor (BF): The percentage of light output produced when a fluorescent lamp(s) is energized from a commercially available ba

38、llast, as compared with the lighting produced when energized from a reference ballast. For an HID lamp/ballast system, BF is determined by dividing the lamp power obtained when the lamp is driven from a commercial ballast by the lamp power when the lamp is driven from a reference ballast. BF tests a

39、re run in accordance with ANSI C82.2 and ANSI C82.6. coefficient of utilization (CU): The ratio of luminous flux (lumens) calculated as received on the work plane to the total luminous flux (lumens) emitted by the lamps alone. compact fluorescent lamp: A compact-shape fluorescent lamp with a single

40、base that performs the entire mechanical support function. energy effectiveness factor (EEF): The percent of lamp lumens or LED luminaire lumens that are received by a specified typical target area for the luminaire. The methodology for calculating EEF is a function of the luminaire product category

41、 to which the luminaire is assigned. fluorescent lamp: A low-pressure mercury electric-discharge lamp in which a fluorescing coating (phosphor) transforms a portion of the ultraviolet energy generated by the arc discharge into visible light. high-intensity discharge (HID) lamp: An electric-discharge

42、 lamp in which the light-producing arc is stabilized by wall temperature, and the arc tube has a bulb wall loading in excess of three watts per square centimeter. HID lamps include groups of lamps known as mercury vapor, metal halide, and high-pressure sodium. incandescent lamp: A lamp in which ligh

43、t is produced by a filament heated to incandescence by an electric current. LED (Light Emitting Diode): A pn junction semiconductor device that emits incoherent optical radiation when forward biased. The optical emission may be in the ultraviolet, visible, or infrared wavelength regions. LED Array:

44、An assembly of LED packages or dies on a printed circuit board or substrate with additional thermal, mechanical, and electrical interfaces that are intended to connect to the load side of an LED driver. It could also include an optical element. Power source and ANSI standardized base are not incorpo

45、rated into the device. The device cannot be connected directly to the branch circuit. LED driver: A device composed of a power source and LED control circuitry designed to regulate power to the LED package or array. It converts the supply voltage to a DC voltage and provides a DC output current to t

46、he LED. LED Package: An assembly of one or more LED dies that includes a type of electrical connections, and thermal, mechanical, and electrical interfaces. It could also have an optical element. Power source and ANSI standardized base are not incorporated into the device. The device cannot be conne

47、cted directly to a branch circuit. lumen: The SI unit of luminous flux. NEMA LE 6-2014 Page 3 2014 National Electrical Manufacturers Association luminaire: A complete lighting unit, consisting of a lamp (or lamps) or light source and ballast or driver together with the parts designed to distribute t

48、he light, to position and protect the lamps or light sources, and to connect the light source through the ballast or driver to the power supply. photometric efficiency: A ratio of luminous flux (lumens) emitted by a luminaire to that emitted by the lamp or lamps or light source used therein. rated l

49、amp lumens: The rated average lumen output for a typical lamp, taken from the manufacturers catalog. These values are substantiated by tests performed in laboratories accredited by the National Voluntary Laboratory Accreditation Program. reference ballast: A ballast especially constructed to have certain prescribed electrical characteristics for use in testing electrical discharge lamps and other ballasts in accordance with ANSI C82.3 or ANSI C82.5. roadway coefficient of utilization (roadway CU): The ratio of luminous flux (lumens) calculated as received within a