1、NEMA Standards PublicationNational Electrical Manufacturers AssociationNEMA LE 5B-1998Procedure for Determining Luminaire Efficacy Ratings for High-Intensity Discharge Industrial Luminaires STD.NEGIA LE SB-EN b. Luminaire placement; c. Other lighting performance characteristics, such as distribution
2、, color, glare, coefficients of utilization, etc.; d. Lighting maintenance issues; e. On/off or reduced level control strategies; f. The ability of a particular ballast to regulate lamp wattage as the line voltage fluctuates. The luminaire efficacy rating of a HID industrial luminaire must be used i
3、n conjunction with the appropriate design factors to determine if a given luminaire is suitable for a particular application. 1.2 REFERENCES The following normative documents contain provisions, which through reference in this text constitute provisions of this Standards Publication. By reference he
4、rein, these publications are adopted, in whole or in part, as indicated in this Standards Publication. American National Standards Institute (ANSI) 11 West 42nd Street, 13th Floor New York, NY 10036 ANSI C78.387-1995 ANSI C78.388-1990 ANSI C82.4-1985 ANSI C82.6-1985 ANSI /IEEE 100 Metal-Halide iamps
5、-Measurement of Characteristics High Pressure Sodium lamps - Measurement of Characteristics High-lntensw-Discharge and Low Pressure Sodium Lamp Ballasts (Multiple-Supply Type), Specifications For High-Intensity Discharge Lamp Ballasts, Methods of Measurement IEEE Standard Dictionary of Electrical an
6、d Electronic Terms STDmNEMA LE 5B-ENGL 1778 W 6470247 0514484 T2T LE 5B-1998 Page 2 Illuminating Engineering Society of North America (IESNA) 120 Wall Street, FL 17 New York, NY 10005-4001 IESNA Lighting Handbook, Eighth Edition, 7993 Electrical and Photometric Measurements of High-Intensity Dischar
7、ge (HID) Lamps Photometric Testing of Indoor Luminaires Using High-lntensrty Discharge or Incandescent Filament Lamps IESNA LM-51-93 IESNA LM-46-92 1.3 DEFINITIONS ballast: A device used with an electric-discharge lamp to obtain the necessary circuit conditions (voltage, current, and wave form) for
8、starting and operating. ballast factor (BF): A term used to describe the percentage of light output produced when a HID lamp is energized from a commercially available ballast as compared to the light output produced when energized from a reference ballast. Ballast factor tests are run in accordance
9、 with ANSI C82.6. fixture: The structural parts of a luminaire, including parts designed to distribute the light, to position and/or protect the lamp(s), to mount and support the ballast), and to provide a wire way or means of connecting the lamp(s) and ballast(s) to the power supply. A fixture incl
10、udes the ballast), but does not include the lamp(s). high-intensity discharge (HID) lamp: An electric discharge 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 o
11、f lamps known as mercury, metal halide, and high pressure sodium. industrial luminaire: A luminaire type designed specifically for the task requirements of an industrial application. lumen: The SI unit of luminous flux. luminaire efficacy rating (LER): A rating used to evaluate the lighting and ener
12、gy performance of a luminaire. luminaire efficiency: The ratio of luminous flux (lumens) emitted by a luminaire to that emitted by the lamp or lamps used therein. typical HID lamp lumens: The established industry standard lumen value for the typical, average, initial lamp lumen output. upward effici
13、ency: The ratio of luminous flux (lumens) emitted by a luminaire in the 90- to 180-degree zone to the total luminous flux emitted by the lamp or lamps used therein. STD=NEMA LE SB-ENGL 1778 6470247 0534485 766 LE 5B-1998 Page 3 Section 2 SELECTION OF COMPONENTS 2.1 TEST SPECIMEN-LIGHTING FIXTURE The
14、 fixture selected for test shall be clean and representative of the manufacturers current and regular production. 2.2 TEST SPECIMEN(S)-HID LAMP(S) Lamp) of stable output shall be used. They should be constant in light output for constant line voltage and repeated operation and typical of current pro
15、duction. 2.3 TEST SPECIMEN(S)-HID BALLAST(S) HID ballast) used for the photometric test shall be adjusted to supply rated lamp watts as specified in IESNA LM-46. LE 58-1 998 Page 4 STD-NEMA LE 5B-ENGL 1998 6470247 0514487 739 LE 5B-1998 Page 5 Section 3 TESTING FACILITIES AND EQUIPMENT 3.1 FACILITIE
16、S The photometric laboratory shall have facilities for performing tests in accordance with all applicable sections of the IESNA LM-46. Because of the importance of obtaining accurate and repeatable measurements, a photometric laboratory accredited by the National Voluntary Laboratory Accreditation P
17、rogram or another third party certification organization is recommended for testing. LE 58-1 998 Page 6 LE 56-1 998 Page 7 Section 4 PROCEDURE 4.1 LUMINAIRE EFFICACY RATING-HIGH-INTENSITY DISCHARGE INDUSTRIAL LUMINAIRES Luminaire efficacy rating shall be specified as a minimum value, a value which c
18、annot be lowered by changing the type of applicable lamp after original installation, for each type and classification shown in 4.3. The input wattage used in the LER calculation should be the rated input wattage for the ballast that is used in the manufacturers standard product offering. 4.2 LUMINA
19、IRES The luminaire efficiency shall be determined by photometric tests in accordance with IESNA LM-46. 4.3 LUMINAIRE TYPE AND CLASSIFICATION a. Open luminaire; b. Closed luminaire. 4.4 EXCEPTIONS Luminaires for special applications (such as hazardous areas as defined by the National Electrical Code
20、and high vandal areas), luminaires utilizing automatically switched quartz standby circuits, and luminaires with less than 150 watt lamp are excluded. STD-NEMA LE 5B-ENGL 3998 b470247 0534490 223 LE 5B-1998 Page 8 - - STDSNEMA LE SE-ENGL 1998 M b470247 05I449I IbT W LE 58-1 998 Page 9 Section 5 CALC
21、U LATI O NS 5.1 LUMINAIRE EFFICACY RATING-HIGH-INTENSITY DISCHARGE INDUSTRIAL LUMINAIRES Luminaire Efficacy Rating (LER) shall be calculated for a given luminaire by the following formula: LER = (EFFx TLL x BF) /Watts Input where: LER = Luminaire Efficacy Rating, expressed in rated lumens per watt.
22、This value shall be shown as a whole number, rounding up (10.5) or down (0.5) as required. EFF = Luminaire Efficiency, expressed as a two-place decimal rounding up (20.005) or down (=150 Watts and 400 = 400 Watts and = 1000 Watts 65 O% and 4 0% =150 Watts and 400 40 45 = 1000 Watts 65 = 400 Watts an
23、d e 1000 40 50 70 40 55 70 =lo% and 40% =150 Watts and 400 45 45 = 400 Watts and = 1 O00 Watts 75 80 =20% =150 Watts and 400 45 45 = 400 Watts and c 1000 55 60 = 1000 Watts 80 85 Table A-2 TYPICAL BALLAST RATED INPUT WATTAGE (As Determined in Accordance with ANSI C82.6) Lamp Type Lamp Wattage Ballas
24、t Type Power Factor Rated Wattage Metal Halide 175 CWA HPF 21 o 250 CWA HPF 295 400 CWA HPF 458 1 O00 CWA HPF 1080 High Pressure Sodium 150 R NPF 1 70 1 50 R HPF 1 70 1 50 HX HPF 188 150 CWA HPF 188 150 cw HPF 196 200 CWA HPF 245 250 CWA HPF 295 31 O CWA HPF 365 400 CWA HPF 457 400 cw HPF 480 750 CWA HPF 850 1 O00 CWA HPF 1100 NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION 1300 NORTH 17TH STREET, SUITE 900 ROSSLYN. VA 22209www.NEMA.orgTO ORDER ADDITIONAL NEMA STANDARDS VISITWWW.GLOBAL.IHS.COM OR CALL 1-800-854-7179/1-303-397-79565612_0514TB
