1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 935 Fluorescent-Lamp BallastsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPR
2、ODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Fluorescent-Lamp Ballasts, UL 935 Tenth Edition, Dated May 21, 2001 Summary of Topics This revision to ANSI/UL 935 includes the following changes in requirements: Add requirements for ballasts intended to be dimmed using
3、solid-state dimming controls electrically wired in series with the mains supply Revise the arcing test method in Section 30 Update reference in paragraph 15.10 to Standard for Capacitors and Suppressors for Radio- and Television-Type Appliances, UL 1414, withdrawn and replaced by the Standard for Fi
4、xed Capacitors for Use in Electronic Equipment Part 14: Sectional Specication: Fixed Capacitors for Electromagnetic Interference Suppression and Connection to the Supply Mains, UL 60384-14 Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a verti
5、cal line in the margin. Changes in requirements are marked with a vertical line in the margin and are followed by an effective date note indicating the date of publication or the date on which the changed requirement becomes effective. The new/revised requirements are substantially in accordance wit
6、h Proposal(s) on this subject dated October 18, 2013 and March 14, 2014. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of
7、 UL. UL provides this Standard as is without warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability or tness for any purpose. In no event will UL be liable for any special, incidental, consequential, indirect or similar damages, inc
8、luding loss of prots, lost savings, loss of data, or any other damages arising out of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall ULs liability for any damage ever exceed the pri
9、ce paid for this Standard, regardless of the form of the claim. Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorneys fees) resulting from
10、 any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, gures, and/or other elements of the Standard having future effective dates as in
11、dicated in the note following the affected item. The prior text for requirements that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. The following table lists the future effective dates with the correspond
12、ing reference. AUGUST 7, 2014 UL 935 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Future Effective Date Reference February 9, 2015 Paragraphs 30.1, 30.2, 30.3, 30.4, 45.5.11, Figure 30.1, Supplement SC, and Supplement SD. AUGUST 7, 201
13、4 UL 935 tr2UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY 21, 2001 (Title Page Reprinted: August 7, 2014) 1 UL 935 Standard for Fluorescent-Lamp Ballasts First Edition August, 1942 Second Edition December, 1949 Third Edition September,
14、 1958 Fourth Edition August, 1969 Fifth Edition May, 1971 Sixth Edition June, 1978 Seventh Edition October, 1984 Eighth Edition February, 1993 Ninth Edition March, 1995 Tenth Edition May 21, 2001 This ANSI/UL Standard for Safety consists of the Tenth edition including revisions through August 7, 201
15、4. The most recent designation of ANSI/UL 935 as an American National Standard (ANSI) occurred on August 7, 2014. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page, or effective date information. The Department of Defense (DoD) has adopted UL 935 on February
16、 17, 1983. The publication of revised pages or a new edition of this Standard will not invalidate the DoD adoption. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative St
17、andards Development System (CSDS) at http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive
18、 property of UL. COPYRIGHT 2014 UNDERWRITERS LABORATORIES INC. ANSI/UL 935-2014UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL FEBRUARY 20, 2006 FLUORESCENT-LAMP BALLASTS - UL 935 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED
19、FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS PART 1 ALL PRODUCTS INTRODUCTION 1 Scope .9 2 Glossary .9 3 Components 11 4 Units of Measurement 11 5 Undated References .12 CONSTRUCTION 6 General .12 7 Mechanical Assembly 13 8 Enclosure .13 8.1 General 13 8.2 Raintightne
20、ss .15 9 Means for Mounting 15 10 Protection Against Corrosion .15 10.1 General .15 10.2 Outdoor ballasts .16 10.3 Weatherproof ballasts .17 11 Compound .17 12 Insulating Materials .18 13 Supply and Load Connections 19 13.1 Terminal and lead wire compartments 19 13.2 Lead wires 21 13.3 Flexible cord
21、s 23 13.4 Bushings 27 13.5 Strain relief 27 13.6 Terminals .27 14 Live Parts 29 15 Capacitors .30 16 Protective Devices Provided in Class P Protected Ballasts .33 17 Protective Devices Provided in Other Than Class P Protected Ballasts 35 18 Printed Wiring Boards .35 19 Spacing of Electrical Parts .3
22、6 19.1 General .36 19.2 Alternate method .37 20 Polymeric Materials .39 PERFORMANCE 21 General 42 22 Input/Output Measurements 45 23 Leakage-Current Test .47 24 Risk of Electric Shock Measurements .50 FEBRUARY 20, 2006 FLUORESCENT-LAMP BALLASTS - UL 935 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FU
23、RTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 24.1 General .50 24.2 Ballast lead and lamp pin measurements 50 24.3 Foil measurement (electronic ballasts) 55 25 Normal-Temperature Test 56 26 Abnormal-Temperature Test .61 27 Fault Condition Test Conventional Magnetic Ballast Class P Pr
24、otection 62 28 Increased-Ambient Temperature Test for Ballasts Class P Protection .65 29 Fault-Condition Test Electronic Ballasts Class P Protection .66 30 Arcing Test 67 31 Voltage Measurement Power Capacitors .68 32 Dielectric Voltage-Withstand Test .69 33 Insulation-Resistance Test .70 34 Limited
25、 Short-Circuit Test 71 35 Foil Trace Calibration .73 36 Metallic-Coating-Thickness Test 74 37 Water-Spray Test .75 38 Humidity-Conditioning Test .78 39 Strain-Relief Test .78 40 Tests on Push-In Terminals 79 40.1 Pullout 79 40.2 Temperature .79 41 Rod Pressure Loading Test 80 42 Volume Method of Mea
26、surement .80 MANUFACTURING AND PRODUCTION TESTS 43 Dielectric Voltage-Withstand Test .80 RATING 44 General 82 MARKING 45 Details .83 45.1 General .83 45.2 Ratings .84 45.3 High power factor 85 45.4 Lamps 85 45.5 Application 86 45.6 Thermal protection .87 45.7 Field connection .87 PART 2 DIRECT PLUG-
27、IN, AND THROUGH CORD BALLASTS CONSTRUCTION 46 Direct Plug-In, and Through Cord Ballasts .88 46.1 General .88 46.2 Enclosure integrity 88 46.3 Weight and moment 89 46.4 Plug face dimensions .91 MAY 21, 2001 FLUORESCENT-LAMP BALLASTS - UL 935 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODU
28、CTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 46.5 Wiring details 93 46.6 Thermal protection .93 47 Blade Conguration .93 48 Strain Relief 93 PERFORMANCE 49 Moment and Weight Test 93 50 Blade Secureness Test 94 50.1 Pull .94 50.2 Push 94 51 Abuse Tests .94 51.1 General .94 51.2 Impact 95 51.3 Rod
29、 pressure 97 51.4 Resistance to crushing 97 51.5 Accessibility .97 SUPPLEMENT SA - FLUORESCENT BALLAST ACCESSORIES SA1 Scope SA1 SA2 General SA1 SA3 Enclosure .SA1 SA4 Means for Mounting SA2 SA5 Supply Connections SA2 SA5.1 Leads SA2 SA5.2 Bushings .SA2 SA5.3 Strain relief .SA2 SA5.4 Lampholder SA3
30、SA6 Capacitors SA3 SA7 Thermal Protection .SA3 SA8 Input Measurements .SA3 SA9 Temperature Test SA4 SA10 Abnormal Operation Tests SA4A SA10.1 General .SA4A SA10.2 Abnormal lamp operation .SA5 SA10.3 Abnormal current .SA5 SA10.4 Unintended application .SA5 SA11 Dielectric Voltage-Withstand Test .SA6
31、SA12 General .SA6 SUPPLEMENT SB - FLUORESCENT BALLASTS WITH DIMMING CIRCUITS, INCLUDING BALLASTS CONTROLLED BY POWER LIMITED CLASS 1, 2, and in the case of rapid start circuits, provides for low-voltage lamp lament heating. 2.3 CHEESECLOTH Used in abnormal condition tests as an indicator of a re haz
32、ard. Bleached cheesecloth is to be 36 inches (910 mm) wide, running 14 15 yards per pound (28 30 m/kg), and have what is known to the trade as a count of 32 X 28; that is, for any square inch, 32 threads in one direction and 28 threads in the other direction (for any square centimeter, 13 threads in
33、 one direction and 11 threads in the other direction). 2.4 CLASS P PROTECTED BALLAST A ballast that is integrally protected from overheating, where the ballast and protection combination comply with the requirements in this standard. 2.5 COMPACT FLUORESCENT LAMP A uorescent lamp of a small compact s
34、hape (such as a folded construction) with all contacts terminating in a single base that performs the entire mechanical support function. 2.6 CONDITIONED LAMP A new lamp that has been operated for a minimum of 100 hours. 2.7 CONVENTIONAL MAGNETIC BALLAST A ballast that consists of a coil of wire wou
35、nd on a core and operates at the supply line frequency. A conventional magnetic ballast is either a transformer type or simple reactance type. A power capacitor is able to be provided with the magnetic ballast. MAY 21, 2001 FLUORESCENT-LAMP BALLASTS - UL 935 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED F
36、OR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2.8 DEACTIVATED LAMP A lamp end-of-life failure mode, that is caused by the depletion of the lament emission material so that the lamp cannot be ionized. 2.9 ELECTRONIC BALLAST A ballast involving high frequency switching that is con
37、trolled by active components (transistors, thyristors, and the like), and with the lamp ballasting impedance provided by a series capacitive or inductive reactance appropriate for the high switching frequency. The lamps and ballasting impedance may be connected either directly or by means of an isol
38、ating transformer to the switching transistors. 2.10 FIXED BALLAST A ballast intended to be permanently connected electrically. 2.11 INSTANT-START CIRCUIT A circuit that employs a high open-circuit voltage to start lamps that usually have a single contact at each end. 2.12 LEAD-LAG CIRCUIT A two-lam
39、p circuit that has one lamp in series with an inductor and the other lamp in series with a capacitor to attain a high power factor. Generally, it may be part of either an instant-start or preheat circuit. 2.13 LIVE PARTS Metallic parts intended to carry voltage or current. A part that is connected t
40、o a grounded (neutral) supply conductor is determined to be a live part. 2.14 MEASUREMENT INDICATION UNIT (MIU) The output voltage across the meter, in millivolts RMS, in the measurement instrument in Figure 23.2, divided by 500 ohms. The instrument indication is equal to the RMS value in milliamper
41、es when the frequency is 60 Hz (sinusoidal current). The reading is not always a direct indication of the RMS or other common amplitude quantier of leakage current when the leakage current is of complex waveform or frequency other than 50 or 60 Hz. 2.15 POWER CAPACITOR A capacitor that is connected:
42、 a) In series with a lamp or lamps and provides the ballast impedance for the lamp current; or b) Across the input leads of the ballast or across an extension of the primary winding for power-factor correction. 2.16 PREHEAT CIRCUIT A circuit with a ballast connected in series with a lamp, and having
43、 a manual or automatic starter that functions to cause an initial heating of the lamp laments prior to ionizing the lamp. The starter, when closed, connects the two lamp laments in series in the ballast circuit. 2.17 RAPID-START CIRCUIT A circuit employing continuously heated lamp laments, along wit
44、h an open-circuit voltage for the ballast to start a lamp without a starter. The lamps usually have miniature or medium bi-pin contacts or specic sockets (for example, circular lamps) for sizes smaller than 40 watts or recessed contacts for the larger 800 and 1500 milliampere sizes. A metal reector connected to ground is needed near the lamps to ensure starting. 2.18 REACTANCE BALLAST A ballast, the impedance of which is provided by: a) Inductive reactance; b) Capacitive reactance; or c) Both inductive and capacitive reactance. MAY 21, 2001 FLUORESCENT-LAMP BALLASTS - UL 935 10
