1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUNDERWRITERS LABORATORIES INC. CERTIFICATION REQUIREMENT DECISIONThis Certification Requirement Decision is prepared and published by Underwriters Laboratories Inc.(UL). It is normative for the a
2、pplicable UL Product Certification Program(s); however, it is currently notpart of the UL Standard(s) referenced below.Product Category (CCN): FKSZ2, FKSZ3Standard Number: UL 8750Standard Title: Standard for Light Emitting Diode (LED) Equipment for use ifLighting EquipmentEdition Date: November 18,
3、2009Edition Number: 1Section / Paragraph Reference: 8.1.3, 8.1.4, 8.1.5, 8.1.6- new; 8.3.1- revised; Table8.1- revised; 8.3.4- revised; 8.3.6.1- new; 8.3.8- revised; 8.3.21- deleted; 8.3A,8.3B- new; 8.5.1.2, 8.5.2.1, 8.5.2.2, 8.5.3.4- revised; Supplement SB- newSubject: Type TL LED driversDECISION:8
4、.1.3 Tissue paper employed as a test compliance indicator shall be white, nominally 0.001 in (0.025 mm)thick and of the type commonly used for gift wrapping.8.1.4 Cheesecloth employed as a test compliance indicator shall be untreated cotton cloth, runningapproximately 0.11 oz/ft2(34 g/m2), with a th
5、read count in the range of 25 33 x 22 30 threads/in (1013x912threads/cm).8.1.5 During all abnormal tests, the unit shall be powered from a supply circuit connected in series with a20 A branch circuit-rated fuse (time delay type), of which the characteristics are such that the fuse doesnot open in le
6、ss than 12 seconds when carrying 40 A.8.1.6 LED driver outputs shall be loaded using resistive, electronic, or LED loads. LED loads may be usedin series with variable resistance to allow for output adjustment.8.3.1 A unit shall be subjected to a temperature test to determine that the temperatures do
7、 not exceed thelimits on the specified components in Table 8.1 during normal operation of the unit. The unit shall bepositioned in an alcove or still-air test oven, see 8.3A or 8.3B, as appropriate for the product andmaintained in an ambient temperature as specified in Table 8.2.UL COPYRIGHTED MATER
8、IAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable 8.1Maximum acceptable temperaturesMaterials and components C FA. COMPONENTS1. Capacitor (other than oil filled) a a2. Fuses a a3. Internal wiring a a4. Potting compoundbSee 6.7bSee 6.75. Printed-wiring boards
9、a a6. Switches, terminal blocks, and connectors a aB. ELECTRICAL INSULATION7. Class 105 (A) Insulation systems:Outer surface thermocouple method 90 194Average resistance method (fully potted) 105 221Average resistance method (open core and coil) 95 203Class 130 (B) Insulation systems:Outer surface t
10、hermocouple method 110 230Average resistance method 120 248Class 155 (F) Insulation systems:Outer surface thermocouple method 135 275Average resistance method 140 284Class 180 (H) Insulation systems:Outer surface thermocouple method 150 302Average resistance method 165 3298. Vulcanized fiber employe
11、d as electrical insulation for other thancoil systems90 194C. SURFACES9. A surface upon which the unit is placed or mounted in service 90 19410. A non-metallic surface of a direct plug-in or through-cord unit 75 16710A. A metallic surface of a direct plug-in or through-cord unit 55 13111. Interior s
12、urface of field-wiring compartment See 8.3.3aThere are no temperatures specified; the manufacturers rated temperature of the material or component is to be used.bUnless the material is thermal-setting, the maximum potting-compound temperature, when corrected to a 40C (104F)ambient temperature, is 15
13、C (27F) less than the softening point of the compound as determined by the Standard TestMethods for Softening Point of Resins Derived from Naval Stores by Ring-and-Ball Apparatus, ASTM E28.8.3.4 A unit for remote applications is to be tested in an ambient air temperature of 25C (77F). Atemperature t
14、est may be performed at any ambient-air temperature within 20 - 30C (68 - 86F) and the5C (9F) of the value noted in Table 8.2. The variation from 25C (77F) the value noted in Table 8.2may be added to or subtracted from the observed temperature readings.8.3.6.1 The LED driver input and output supply
15、electrical parameters (V, A, W), are to be recorded 15minutes after the start of the test and at the end of the test. The input current measurements shall complywith 8.2.2. The output current recorded at the end of the test shall be within 10 percent of the initiallyrecorded value.8.3.8 A unit inten
16、ded to be used inside of a luminaire shall be supported in a test oven with its mountingsurface down and 76 mm (3 in) above the base of the enclosure in a central position on two 76 mm (3 in)wooden or ceramic cleats. To determine the temperature produced on the device surface, thermocouplesshall be
17、attached to the case in the areas of major heat sources. Temperatures on the device case shallSTANDARD NUMBER: UL 8750 -2-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULbe determined by means of thermocouples, and in the coils by the thermoco
18、uple or rise-of-resistancemethod. The unit shall be conditioned in the test oven until all parts reach the temperature of the heatedair therein prior to the test.8.3.21 Deleted During testing described in 8.3.20, the LED driver input and output supply electricalparameters (V, A, W), including in add
19、ition to the test criteria in 8.3.6.1, images of the waveforms, duringmethods 2, 3, and 4 are to be recorded. The input current shall comply with 8.2.2.8.3A Temperature test alcove8.3A.1 The test alcove shown in Figure 8.1.2 shall have three sides made of plywood conforming to8.3A.2, joined at right
20、 angles to form a corner with butt-fitted seams secured by wood screws or nails.Each side shall project 12 in (300 mm) beyond the luminaire.8.3A.2 The plywood used shall be 0.5 in (12 mm) thick, with at least one side that has all voids filled andsanded.8.3A.3 The product shall be mounted inside so
21、it touches two walls and the top of the alcove, in theconfiguration and orientation that result in the highest temperatures.This is generated text for figtxt.STANDARD NUMBER: UL 8750 -3-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULFigure 8.
22、1.2Temperature testalcoveNote:EUT = equipment under testSTANDARD NUMBER: UL 8750 -4-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL8.3B Temperature test oven8.3B.1 During the test the unit under test is to be supported as illustrated in Figur
23、e 8.1.3. The floorbetween the heaters and the unit under test is to be of a thermal insulating material. The test compartmentof the enclosure is to have internal dimensions of 24 by 24 inches (610 by 610 mm). The floor of the testcompartment is to be 22 by 22 inches (559 by 559 mm), permitting an ai
24、r space of 1 inch (25.4 mm) allaround the floor for circulation of the heated air. A 3-inch (76.2-mm) deep heater compartment is to beprovided below the floor of the test area for the heating elements. One side of the test compartment maybe removable, but is to be constructed so that it can be secur
25、ely fastened to the remainder of theenclosure. One of the sides is to have a 6-inch (152-mm) square opening located centrally at the bottomedge of the test compartment, and the enclosure is to be constructed so that the only possibility of aircirculation will be through this opening. The opening is
26、to be covered by an aluminum shield positionedso that it extends 1/2 inch (12.7 mm) beyond the perimeter of the opening.8.3B.2 The heat source used for the test oven described in 8.3B.1 is to consist of four 300-watt, 230-volt,strip heaters having heating surface dimensions of approximately 1-1/2 by
27、 12 inches. The elements are tobe connected in parallel to a 120-volt supply source. The elements are to be mounted in the 3-inch (76.2mm) deep heater compartment midway between the test-compartment floor and the base, and are to bearranged so that they form a square with the outside edge of each el
28、ement 2-1/2 inches (63.5 mm) fromthe adjacent inside wall of the compartment. The elements are to be controlled by a thermostat.8.3B.3 The heaters located below the floor of the oven compartment are to be thermostatically controlledto provide the required oven temperature regardless of the heat gain
29、 from the device under test. Glowingcoils shall not radiate directly onto the unit under test. The volume of the oven compartment is to bebetween 5-1/2 ft3(0.156 m3)and8ft3(0.226 m3).8.3B.4 In lieu of the oven construction described in 8.3B.1 to 8.3B.3, a commercially manufactured ovenhaving still-a
30、ir convection heating may be used. The heaters are to be located below the floor of the ovencompartment, and are to be thermostatically controlled to provide the required oven temperatureregardless of the heat gain from the device under test. Glowing coils shall not radiate directly onto the unitenc
31、losure. The volume of the oven compartment is to be between 5-1/2 ft3(0.156 m3)and8ft3(0.226m3).This is generated text for figtxt.STANDARD NUMBER: UL 8750 -5-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULFigure 8.1.3Test ovenNote:EUT = equip
32、ment under testSTANDARD NUMBER: UL 8750 -6-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL8.5.1.2 During each test,:a) Tthe grounding means, if provided, is to be connected to ground through a 3-A non-timedelay fuse, andb) The unit is to be d
33、raped placed on a softwood surface covered with white tissue paper anddraped with a double layer of cheesecloth conforming to the outline of the unit, and The whitetissue paper shall be nominally 0.001 in (0.025 mm) thick, commonly used for gift wrapping.The cheesecloth shall be untreated cotton clo
34、th running approximately 0.11 oz/ft2(34 g/m2),with a thread count in the range of 25 - 33 x 22 - 30 threads/in (10 - 13x9-12threads/cm).c) The unit is to be energized at rated input voltage and frequency. The supply circuit is to beconnected in series with a 20 A branch circuit-rated fuse (time dela
35、y type), of which thecharacteristics are such that the fuse does not open in less than 12 s when carrying 40 A.d) The unit is to be operated at ambient temperatures of 25C 5C (77F 5F).8.5.2.1 A unit having components such as diodes, resistors, transistors, capacitors, and the like shallnot exhibit a
36、 risk of fire or electric shock when a simulated short circuit or open circuit isimposed.electrolytic capacitors or semiconductor devicesException No. 1: Circuits in which maximum power levels have been determined to not exceed 50 W neednot be evaluated for component failure.Exception No. 2: Devices
37、 supplied by a Class 2 or LVLE source operating within the limits for risk of fireand electric shock need not be subject to this test.8.5.2.2 Each electrolytic capacitor and semiconductor device component is to be short circuited or opencircuited, one at a time (one fault per test). Each test shall
38、continue until either the unit is no longeroperable, or until conditions are obviously stable (as determined by no visual changes or detectablethermal increase) for at least 30 minutes.Exception: Components whose reliability against failure have already been evaluated shall not befaulted. Examples:
39、isolated pins of optical isolators evaluated to the Standard for Optical Isolators, UL1577, and properly spaced leads of capacitors evaluated to the Standard for Fixed Capacitors forElectromagnetic Interference Suppression and Connection to the Supply Mains, UL 60384-14.8.5.3.4 Each output is to be
40、short-circuited in turn. The temperature on the enclosure shall not exceed90C (194F) for through-cord or direct plug-in types and 110C for all other types. These limits apply tooutput loading test conditions which continue 30 minutes or longer.Exception: A temperature of 150C (302F) is acceptable if
41、 the unit permanently opens within 1 hourafter initiation of the test.SUPPLEMENT SB - REQUIREMENTS FOR TEMPERATURE LIMITED (TYPE TL) LED DRIVERSSB1 ScopeSB1.1 These requirements apply to Temperature Limited (Type TL) LED drivers.SB2 DefinitionsSTANDARD NUMBER: UL 8750 -7-UL COPYRIGHTED MATERIAL NOT
42、AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULSB2.1 TEMPERATURE MEASUREMENT POINT, Tc - A specific location assigned by the manufactureron the LED driver case.SB2.2 SPECIFIED Tref- The temperature limit for the LED driver at Tc, under normal operating conditions,as ass
43、igned by the manufacturer.SB2.3 CALCULATED Tref- The calculated temperature limit for the LED driver at Tc under normaloperating conditions per SB4.3.SB3 ConstructionSB3.1 A Type TL LED driver shall comply with all applicable construction requirements of this standardand the following construction f
44、eatures:a) The driver shall not rely upon external overcurrent or over temperature protection forcompliance with requirements of this standard,b) The driver shall not rely upon external heat management methods such as forced air coolingor non-integral heat-sinking for compliance with requirements of
45、 this standard,c) The driver shall be provided with an enclosure that complies with 6.1.2, andd) The driver shall be provided with supply connections that comply with 7.4.1 and one of themethods described in 7.4.2 or 7.4.3. The driver shall be provided with load connections thatcomply with 7.4.1 and
46、 7.4.4.SB4 PerformanceSB4.1 A Type TL LED driver shall comply with all applicable performance requirements of this standard,in addition to the requirements in this section.SB4.2 During the Temperature Test, Section 8.3, for a Type TL LED driver, the Calculated Trefvalue shallbe determined as follows
47、:a) The difference between the maximum permitted temperature (per Table 8.1) and themeasured temperature is noted for each component T1 . Tn. The values are normalized per8.3.4 as necessary. The smallest difference is designated T. When the driver is subject tomultiple temperature tests based on the
48、 requirements of this standard, the Calculated T valuesshall be determined for each test Tt1. Ttn. The lowest value for all tests is T.b) This T is added to the temperature measurement at Tc. The result is designated as theCalculated Tref.SB4.3 The Specified Trefshall not exceed the Calculated Tref.
49、SB4.4 During the Temperature Test, Section 8.3, for a Type TL LED driver not subject to the limits ofTable 8.1, Items 10 or 10A, the Specified Trefshall not exceed 90 C.SB4.5 During the Temperature Test, Section 8.3, for a Type TL LED driver the maximum exterior surfaceshall be monitored and recorded.STANDARD NUMBER: UL 8750 -8-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULa) When the TL LED driver is a through-cord or direct plug-in type, the maximum exteriorsur
