UL 8750 TGD-2018 UL Standard for Safety Light Emitting Diode (LED) Equipment for Use in Lighting Products - Section Paragraph Reference 2 1 Subject Surge Protective Devices (SPDs).pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL TECHNICAL GUIDANCE DOCUMENTSThis Document is prepared and published by UL.Product Category (CCN): FKSZ (2,3)Standard Number: UL 8750Standard Title: Standard for Light Emitting Diode (LED) Equi

2、pment for Use inLighting ProductsEdition Date: September 15, 2015Edition Number: 2Section / Paragraph Reference: 2.1Subject: Surge Protective Devices (SPDs)GUIDANCE:This document provides guidance regarding the appropriate level of evaluations for Surge-protectiveDevices that are integral to LED dri

3、vers. The acronyms below are described in the guide card for VZCA2(Component Surge-protective Devices). (Note- if the link will not launch; to access the guide card go click on UL Category Code (options) enter UL category code VZCA2, check the boxfor Display Guide Information only, click search)1 W

4、hen a SPD is used to provide surge suppression claims to UL 1449, it should beinvestigated per the applicable requirements of UL 1449. The description of the SPD is to be inaccordance with the program requirements for that category.2 When a SPD is used to comply with requirements in UL 840 where lev

5、els of overvoltageare controlled, Clearance “B”- clause 8 requirements apply. When describing the SPD,information noted below should be included;Surge Protective Devices VZCA2/CN, SPD Type 1CA2CA3CA4CA5,minimum rated operating voltage _ V _ ac dc, minimum _ MCOV, minimum_ In, maximum _ MLV or VPR ,

6、minimum _ SCCR (as applicable to the SPDand as needed for the end-use application).3 When the SPD is not used for one of the above purposes, it should be evaluated to mitigatethe potential hazard of the SPD itself. The following characteristics should be confirmed as partof end product evaluation: M

7、inimum (working) voltage rating Minimum current rating (if SPD carries load current in the circuit) Minimum temperature ratingWhen describing the SPD, information noted below should be included;Surge Protective Device VZCA2/CN, SPD Type 1CA2CA3CA4CA5,minimum voltage rating _Vacdc,minimum rated curre

8、nt _ A (whenapplicable), minimum temperature rating _C.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULWhen “Note 4” is included in the individual Recognition card (see example attached), it means the SPDemployed a specific upstream protective

9、 device in order to comply with the safety requirements of UL1449. Therefore, this SPD should be described by manufacturer and catalog number and presence of thespecified protective device should be noted in accordance with the conditions of use.RATIONALE FOR GUIDANCE:This guidance is provided to do

10、cument the current certification practice for evaluating and describingmetal oxide varistors (MOVs) and other types of SPDs used in lighting equipment.When the SPD provides the basis for suppression ratings per UL 1449, or allows reduced clearances perUL 840, its evaluation and description needs to

11、be in accordance with the requirements of thesestandards.When the SPD is used to provide some level of surge immunity to the end-product for commercialpurposes, its suitability is determined by its compliance with the end-product normal and abnormalconditions tests, and by verifying that the SPD has

12、 suitable minimum rated working voltage andtemperature for the end-product application. For SPDs that normally carry load current, such as 3-wireand 2-port devices, they should also be suitably rated for the current they will carry during normaloperation of the end-product. A current rating is not a

13、pplicable to two-wire devices intended to only carrycurrent during transient events, such as MOVs connected across the line or between line and ground.SPDs that include “Note 4” as part of their component certification are special cases due to their relianceon upstream protective components. As such

14、 the conditions of use associated with this note need to beconsidered and addressed in the end-product.Sample of a Recognition card with Note 4 underlinedVPR MLV MCOV Vn In SCCR(Vpk) (Vpk) (V) (Vdc) (kA) (kA) NOTES 590 130 200 3 n/a 1, 3, 4Copyright 2018 UL LLCULs Technical Guidance Documents are i

15、ntended to be used as reference documentation and aredesigned to provide assistance in understanding the application of requirements contained in thecorresponding UL Standard, provide assistance in addressing the use and applications of the respectiveproducts covered by the associated UL Standard(s), or both.These guidelines do not contain any construction or performance requirements.STANDARD NUMBER: UL 8750 -2-