UL 917 CRD-2015 UL Standard for Safety Clock-Operated Switches - Section Paragraph Reference 43 2 Table 28 1 (revised) 42 7 Section 29A (new) Subject Addition of Requirements for .pdf

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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): WGZRStandard Number: UL 917Standard Title: Standard for Clock-Operated SwitchesEdition Date: November 10, 2006Edition Number: 5Section / Paragraph Reference:

3、 43.2, Table 28.1 (revised), 42.7, Section 29A (new)Subject: Addition of Requirements for the Test Method and Simulated ElectricalLoads for Electronic Ballast, CFL and LED Driver RatingsDECISION:Table 28.1Values of voltage and current for endurance testsDevice rated in Test potential Test current Po

4、wer factor Numberof cyclesCyclesperminuteAmperes, AC, DC Rated Voltage See 24.4 AC rated 0.75 0.80d6000 6aDC rated b 6000 6aHorsepower, AC Rated Voltage See 24.4 AC full-load currentindicated in Table 27.20.75 0.80 6000 6aHorsepower, DC 0.5 times RatedVoltage See 24.4DC full-load currentindicated in

5、 Table 27.3b 6000 6aFull-load andlocked-rotoramperesRated Voltage See 24.4 AC rated full-load current 0.75 0.80 6000 6aDC rated full-load current b 6000 6aAmperes(Tungsten)Rated Voltage See 24.4 AC rated current e 6000 1cDC rated current e 6000 1cAmperes (Inductive) Rated Voltage See 24.4 Two times

6、rated current 0.75 0.80 6000 6aVolt-Amperes PilotDutyRated Voltage See 24.4 See 28.4 See 28.4 6000 See 28.4Electronic ballast,self ballasted LEDand CompactFluorescent Lamps,LED drivers andsimilar loads withcapacitive loadcharacteristicsRated Voltage See 24.4 Rated current per Table29A.1N/A 6000 6aTh

7、e test cycle is to be 1 second on and 9 seconds off, if the nature of device permits the test to be so made.bNoninductive resistive load.cThe test cycle is to be as indicated in 27.2.dIf the device is marked for a resistive load only in accordance with 43.2 the test may be conducted using anoninduct

8、ive load.eThe load shall consist of tungsten filament lamps or a load having equivalent characteristics. See 29.1 29.5.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL29A Electronic ballast, CFLs and LED driver rated controls29A.1 (New) A devi

9、ce having electronic ballast, self-ballasted LED and CFL Lamps, LED fixtures, or LEDdriver load rating shall be tested for Endurance using the load characteristics specified in Tables 28.1 and29A.1. As a result of the testing, there shall be no electrical or mechanical breakdown of the device, norun

10、due burning, pitting, or welding of the contacts.Table 29A.1Peak current requirements for endurance testSteady statecurrent (A)Peak current(A), 120 V ACPulse width120 V AC (mS).See Note 2I2t(A2sec) 120V AC. See Note1Peak current(A), 277 V ACPulse width277 V AC (mS).See Note 2I2t(A2sec) 277V AC. See

11、Note10.5 75 0.34 11 77 0.07 111 107 0.48 24 131 0.71 272 144 0.70 41 205 0.85 763 166 0.89 51 258 0.98 1115 192 1.20 74 320 1.20 2058 221 1.25 98 370 1.25 27410 230 1.50 106 430 1.50 37012 235 1.80 110 440 1.80 38715 239 2.00 114 458 2.00 42016 242 2.10 117 480 2.10 461NOTES1 - The values used to ca

12、lculate I2t are the peak current shown and pulse duration of 2 mS (t).2 - Pulse widths shown will provide adequate performance with electronic ballasts having pulse widths up to 2 ms, inaccordance with the Standard for Lamp Ballasts - High Frequency Fluorescent Lamp Ballasts, ANSI_ANSLG C82.11, or t

13、heStandard for Lamp Ballasts Low-Frequency Square Wave Electronic Ballasts - for Metal Halide Lamps, ANSI_ANSLG C82.14.29A.2 The synthetic load described in 29A.3 and 29A.4 shall be used as the load for testing. Theendurance test shall be completed with that load.29A.3 The series coil values must be

14、 adjusted based on the input line characteristics to achieve the peakcurrents listed in Table 29A.1. The series coil shall be sized such that it does not saturate during testingand shall be able to handle the resulting power dissipation with less than 10C temperature rise. Peakcurrent and pulse widt

15、h are illustrated in Figure 29A.2.29A.4 The circuit shall provide a method to discharge the capacitor bank in between test cycles withoutinfluencing the performance of the device under test. This is accomplished by S2 and R2 in Figure 29A.1.S2 should be switched alternately with S1 and R2 should be

16、sized to allow for complete discharge of Cduring the period that S1 is open.This is generated text for figtxt.STANDARD NUMBER: UL 917 -2-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULFigure 29A.1Typical test circuit diagramReference Descript

17、ionAC Test voltage is either 277 VAC or 120 VACS1 Device Under TestL Series Inductor, its value of inductance (L) and resistance (R) are selected. When combined with the AC line sourceimpedance it provides the specified Reference WaveformsR1 AC synthetic load resistor, value to provide desired conti

18、nuous current. (e.g., 5A, 8A, mldr 6A)D1-D4 Bridge rectifierC Capacitor load bank, design value to provide 125 F for each continuous amp of load current at a test voltage of 277 VAC,and 175 F for each continuous amp of load current at a test voltage of 120 VAC.S2 Capacitor discharge switchR2 Bleeder

19、 resistor, value to provide appropriate capacitor load bank discharge rateSTANDARD NUMBER: UL 917 -3-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL42.7 (NEW) A clock-operated switch intended for use with electronic ballasts, self-ballasted L

20、ED andCompact Fluorescent Lamps, LED drivers LED fixtures, and similar loads with capacitive loadcharacteristics, having a rated current (steady state current) and rated voltage in accordance with 24.4shall be marked in accordance with 43.2(e).43.2 A permanently connected switch intended for the con

21、trol of a certain type load shall be marked withthe appropriate designation or an acceptable abbreviation or a combination of the markings, for example:a) Resistance only or R if intended for non-inductive resistance loads,b) Tungsten or T if intended for the control of tungsten-filament-lamp loads,

22、c) Inductive or H if intended for the control of high inductive loads such as gas-tube-signtransformers, fluorescent lamp loads, and the like,d) Pilot duty or PD if intended for the control of a magnet-coil load.e) For Control of Electronic Ballast, CFLs, LED, LED Lamps, and LED Fixtures or theequiv

23、alent if intended for general control of electronic ballasts, self-ballasted CompactFluorescent Lamps LED Lamps, LED drivers, and LED Fixtures.RATIONALE FOR DECISION:This Certification Requirement Decision is intended to document the electrical load requirements forclock-operated switches having ele

24、ctronic ballast, self-ballasted LED and CFL Lamps, LED fixtures, orLED driver load ratings.Figure 29A.2Waveform per synthetic measurement of pulse width and peak currentSTANDARD NUMBER: UL 917 -4-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM U

25、LThese requirements are the same as those in UL 916, the Standard for Energy Management Equipment,Section 48A for Electronic Ballast, CFLs and LED Driver Rated Controls and are adopted from the NEMA410-2011 test method and simulated electrical loads for electronic ballast, CFL and LED driver ratings

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27、re the opinion of Underwriters Laboratories Inc. inpractically applying the requirements of the standard. They do not represent formal interpretations of thestandard under American National Standards Institute (ANSI) processes. UL shall not be responsible toanyone for the use of or reliance upon Cer

28、tification Requirement Decisions by anyone. UL shall not incurany obligation or liability for damages, including consequential damages, arising out of or in connectionwith the use or reliance upon Certification Requirement Decisions. The electronic version of theCertification Requirement Decision is

29、 the current version and previously printed copies may be outdated.This document is published as a service to ULs certification customersSTANDARD NUMBER: UL 917 -5-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULSTANDARD NUMBER: UL 917 -6-No Text on This Page