1、NEMA Standards PublicationNational Electrical Manufacturers AssociationNEMA SSL 7A-2015 Phase-Cut Dimming for Solid State Lighting:Basic CompatibilityNEMA SSL 7A-2015 Page i 2015 National Electrical Manufacturers Association NEMA Standards Publication SSL 7A-2015 Phase-Cut Dimming for Solid State Li
2、ghting: Basic Compatibility Published by: National Electrical Manufacturers Association 1300 North 17th Street, Suite 900 Rosslyn, Virginia 22209 www.nema.org 2015 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. NEMA SSL 7A-2015 Page ii 2015 National Electrical Manufacturers Association NOTICE AND DISCLAIMER The information in this publication was considered
4、technically sound by the consensus of persons engaged in the development and approval of the document at the time it was developed. Consensus does not necessarily mean that there is unanimous agreement among every person participating in the development of this document. National Electrical Manufact
5、urers Association (NEMA) standards and guideline publications, of which the document contained herein is one, are developed through a voluntary consensus standards development process. This process brings together volunteers and/or seeks out the views of persons who have an interest in the topic cov
6、ered by this publication. While NEMA administers the process and establishes rules to promote fairness in the development of consensus, it does not write the document and it does not independently test, evaluate, or verify the accuracy or completeness of any information or the soundness of any judgm
7、ents contained in its standards and guideline publications. NEMA disclaims liability for any personal injury, property, or other damages of any nature whatsoever, whether special, indirect, consequential, or compensatory, directly or indirectly resulting from the publication, use of, application, or
8、 reliance on this document. NEMA disclaims and makes no guaranty or warranty, expressed or implied, as to the accuracy or completeness of any information published herein, and disclaims and makes no warranty that the information in this document will fulfill any of your particular purposes or needs.
9、 NEMA does not undertake to guarantee the performance of any individual manufacturer or sellers products or services by virtue of this standard or guide. In publishing and making this document available, NEMA is not undertaking to render professional or other services for or on behalf of any person
10、or entity, nor is NEMA undertaking to perform any duty owed by any person or entity to someone else. Anyone using this document should rely on his or her own independent judgment or, as appropriate, seek the advice of a competent professional in determining the exercise of reasonable care in any giv
11、en circumstances. Information and other standards on the topic covered by this publication may be available from other sources, which the user may wish to consult for additional views or information not covered by this publication. NEMA has no power, nor does it undertake to police or enforce compli
12、ance with the contents of this document. NEMA does not certify, test, or inspect products, designs, or installations for safety or health purposes. Any certification or other statement of compliance with any health or safetyrelated information in this document shall not be attributable to NEMA and i
13、s solely the responsibility of the certifier or maker of the statement.NEMA SSL 7A-2015 Page i 2015 National Electrical Manufacturers Association Foreword The NEMA Solid State Lighting section has prepared this standard, Phase-Cut Dimming for Solid State Lighting: Basic Compatibility. This standard
14、provides compatibility requirements for phase-cut dimming for LED light engines and is suitable for global use. In the preparation of this standard, input of users and other interested parties has been sought and evaluated. Inquiries, comments, and proposed or recommended revisions should be submitt
15、ed to the concerned NEMA product subdivision by contacting: Senior Technical Director, Operations National Electrical Manufacturers Association 1300 North 17th Street, Suite 900 Rosslyn, Virginia 22209 Section approval of the standard does not necessarily imply that all section members voted for its
16、 approval or participated in its development. At the time the standard was approved, the Lighting Controls and Light Source sections were composed of the following members: Acuity Brands Lighting Advanced Lighting Technologies Cree, Inc. Eaton Lighting Solutions EiKO, Ltd. Enerlites Inc. EYE Lightin
17、g International of N.A., Inc. Feit Electric Company GE Lighting Solutions Halco Lighting Technologies Havells USA Hubbell Incorporated Juno Lighting Group an Acuity Brands Company Legrand, North America Leviton Manufacturing Co., Inc. Light Sources Inc. Lifetronics International, Inc. Lucidity Light
18、s Lumileds LLC Lutron Electronics Company, Inc. MaxLite OSRAM SYLVANIA Inc. OttLite Technologies Philips Lighting RAB Lighting Satco Products, Inc. Schneider Electric Southwire Company Technical Consumer Products, Inc. NEMA SSL 7A-2015 Page ii 2015 National Electrical Manufacturers Association Unive
19、rsal Lighting Technologies Ushio America, Inc. WattStopper Westinghouse Lighting NEMA SSL 7A-2015 Page iii 2015 National Electrical Manufacturers Association CONTENTS Foreword i Section 1 GENERAL . 1 1.1 Scope 1 1.1 Organization 2 1.2 Normative References 2 1.3 Informative References . 2 1.4 Definit
20、ions . 2 Section 2 BACKGROUND 5 2.1 Phase-Control Dimming 5 2.2 LLE/Dimmer Compatibility Factors . 5 Section 3 DIMMER 7 3.1 General . 7 3.2 Rated Wattage 7 3.3 Forward Phase-Control Stability Requirements 7 3.4 Inrush Current . 7 3.5 Repetitive Peak Current 8 3.6 Overload 8 3.7 Repetitive Peak Volta
21、ge 8 3.8 Minimum On-State Conduction Angle 9 3.9 Maximum On-State Conduction Angle . 9 3.10 Off-State Operation . 9 3.11 On-State Dimmer Supply Current . 12 3.12 Marking Requirements 14 Section 4 LLE 15 4.1 Phase-Control Requirements 15 4.2 Rated Wattage 15 4.3 Power Factor . 15 4.4 Maximum RMS Curr
22、ent 15 4.5 Inrush Current . 15 4.6 Repetitive Peak Current 16 4.7 Repetitive Peak Voltage 17 4.8 Light Output . 17 4.9 Off-State Operation . 18 4.10 On-State Operation . 19 4.11 Marking Requirements 20 CIRCUITS (NORMATIVE) . 21 A.1 Line Characteristics and Circuit Values . 21 Table A-1 Line Characte
23、ristics 21 Table A-2 Synthetic Load Component Values (100V, 50/60HZ) 22 Table A-3 Synthetic Load Component Values (120V, 60HZ) . 22 Table A-4 Synthetic Load Component Values (230V, 50 HZ) 23 Table A-5 Synthetic Load Component Values (277V, 60HZ) . 24 A.2 Circuit 1 (Synthetic Load 1 for Dimmer Forwar
24、d-Phase Stability, Inrush Current, Repetitive Peak Current and Overload Testing) . 25 Figure A-1 Circuit for Forward-Phase Stability, Inrush Current, Repetitive Peak Current and Overload Testing 25 Table A-6 Component Values For Use in the Synthetic Load of Figure A-1 25 A.3 Circuit 2 (Synthetic Loa
25、d 2 for Dimmer for Forward-Phase Stability, Maximum and Minimum On-State Conduction Angle and On-State Operation Testing) 26 Figure A-2 Circuit for Forward Phase Stability, Maximum and Minimum On-State Conduction Angle and On-State Operation Testing 26 NEMA SSL 7A-2015 Page iv 2015 National Electric
26、al Manufacturers Association Table A-7 Component Values for Use in the Synthetic Load of Figure A-2 . 27 A.4 Circuit 3 (Waveform Generator for Inrush Current) 27 Figure A-3 Waveform Generator for Inrush Test Current 27 Table A-8 Component Values for Use in the Waveform Generator of Figure A-3 . 27 A
27、.5 Circuit 4 (Waveform Generator for Maximum RMS Current, Repetitive Peak Current, Repetitive Peak Voltage, Light Output, Off-State Operation, On-State Operation) . 28 Figure A-4 Waveform Generator for Maximum RMS Current, Repetitive Peak Current, Repetitive Peak Voltage, Light Output, Off-State Ope
28、ration, On-State Operation 28 Table A-9 Waveform Generator Component Values 29 FIGURES Figure 1-1 LED Light Engine 1 Figure 2-1 Generic Waveform Produced By A Forward Phase-Control (Leading Edge) Dimmer . 5 Figure 3-1 Circuit For Off-State Testing Of Dimmers 10 Figure 3-2 Dimmer Allowable Off-State
29、Current (100V and 120V MAINS) 11 Figure 3-3 Dimmer Allowable Off-State Current (230V and 277V MAINS) 12 Figure 3-4 Dimmer Allowable On-State Dimmer Supply Current (100V and 120V MAINS) 13 Figure 3-5 Dimmer Allowable On-State Dimmer Supply Current (230V and 277V MAINS) 14 Figure 4-1 Light Output 18 T
30、ABLES Table 3-1 Repetitive Peak Voltage Limit Table (Dimmer) 9 Table 4-1 LLE Inrush Current Limits 16 Table 4-2 Repetitive Peak Voltage Table (LLE). 17 Table 4-3 Limits for Off-State Operation Test 19 NEMA SSL 7A-2015 Page 1 2015 National Electrical Manufacturers Association Section 1 GENERAL 1.1 Sc
31、ope This standard provides compatibility requirements when a forward phase-cut dimmer is combined with one or more dimmable LED Light Engines (LLEs). An LLE, for the purposes of this document, comprises one or more LED modules, LED control gear (integral or remote), and a connection to the mains cir
32、cuit1. Three configurations of LED light engines are shown below (Figure 1-1). Figure 1-1 LED Light Engine The requirements in this standard do not limit its use to any specific lighting product type or application, and it is suitable for use globally. For the purposes of this standard, compatibilit
33、y means: a. The reliability of the dimmer and LLE are not affected by combining them. b. Dimming behavior meets or exceeds the behavior specified in sections 3 and 4. Any interfaces between control gear and LED module(s) within the LLE are undefined in this standard. Such an interface may take a var
34、iety of forms. For example, it may be a constant voltage interface, a constant current interface, or a low-voltage alternating current interface produced by control gear that is simply a step-down electronic transformer. In all cases, compatibility is only defined for the LLE (which may contain one
35、or more specific combinations of control gear and LED module(s), and not for either component independently. To be considered compliant with this standard, the control gear and modules shall be operated together. This standard does not preclude future standards that will permit separate qualificatio
36、n of control gear and module components, with interfaces defined between them that ensure a proper SSL 7A LLE interface from the point of view of this standard. This standard is forward-looking and is intended to be used to design and qualify dimmer and LLE products (including integral or remote con
37、trol gear) for use with each other. It is not intended for use to determine compatibility with existing products or the installed base of LLEs and phase-cut dimmers. For information on compatibility with the installed base of dimmers, see SSL 6-2010. NOTEAny requirement for compliance to this standa
38、rd does not supersede applicable international or local regulation. 1 Through an ANSI/IEC base or a non-ANSI/IEC interface. NEMA SSL 7A-2015 Page 2 2015 National Electrical Manufacturers Association 1.1 Organization This standard is organized in two parts. Part A covers the minimum requirements for
39、compatibility. Part B covers minimum requirements for performance. This document describes only Part A. SSL 7B is currently under development. The standard is predicated on being able to separate the dimmer and LLE for independent testing. Synthetic loads (representing an LLE) are defined for testin
40、g of dimmers, and waveform generators (representing a dimmer) are defined for testing of LLEs. As a result of this separation, the specifications and testing are separated into a dimmer and an LLE section. Proper performance of the LLE with the waveform generators ensures that the LLE will meet the
41、compatibility requirements with dimmers that have been designed using the synthetic loads. Similarly, proper performance of the dimmer with the synthetic loads ensures compatibility when operating with an LLE that has been designed using the waveform generators. Many tests included in this specifica
42、tion may be application dependent. Therefore, a manufacturer should consider the need to conduct the tests for various installation applications. 1.2 Normative References The following normative documents contain provisions which, through reference in this text, constitute provisions of this standar
43、ds publication. By reference herein these publications are adopted, in whole or in part as indicated, in this standards publication. ANSI/IES RP-16-10 Nomenclature and Definitions for Illuminating Engineering IEC 60038 Ed. 7.0 IEC Standard Voltages IEC 60669-2-1 Ed 4.1 2009-01 Switches for Household
44、 and Similar Fixed-Electrical Installations Part 2-1: Particular RequirementsElectronic Switches NEMA 410-2011 Performance Testing for Lighting Controls and Switching Devices with Electronic Drivers and Discharge Ballasts 1.3 Informative References ISO/IEC 17025: 2005 General requirements for the co
45、mpetence of testing and calibration laboratories NEMA PB 1-2011 Panelboards NEMA SSL 6-2010 Solid State Lighting for Incandescent Replacement Dimming, with April 2011 Errata 1.4 Definitions compatible: Two components of a system, for example a dimmer and a light source, when combined, provide basic
46、functionality as described in SSL 7A. For the purposes of this standard, compatibility means: 1) the reliability of the dimmer and LLE are not affected by combining them and 2) dimming behavior meets or exceeds the behavior specified in sections 3 and 4. conduction angle: In the case of a forward ph
47、ase dimmer, conduction angle is the phase angle (180-0 degrees) measured from the point where conduction begins (for the purposes of this standard, conduction is defined as when the voltage across the load exceeds 20% of instantaneous line voltage at that point) to the next zero cross location (begi
48、nning of the next half-cycle). See Figure 2-1. NEMA SSL 7A-2015 Page 3 2015 National Electrical Manufacturers Association phase-cut dimmer: A dimmer, for the purposes of this standard, is a control unit that produces a forward phase (leading edge) ac waveform. This dimmer output waveform is supplied
49、 to one or more LLEs. The conduction angle of the waveform is adjustable. (See Figure 2-1 for an example of a forward phase dimmer output waveform.) electronic control gear (ECG): Electronic control gear is the electronics that converts ac mains into a signal that drives the LEDs (or LED module). The electronic control gear may be integrated into an LLE or it may be a separate module that drives an LED module. Also known as a driver. inrush current: Waveform of the input current, measured immediately after the input voltage is connected. in
