UL 1703 CRD-2010 UL Standard for Safety Flat-Plate Photovoltaic Modules and Panels - Section Paragraph Reference 41 1 Subject Mechanical Loading Test Deflection Parameter (Edition.pdf

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): QIGUStandard Number: UL 1703Edition Date: March 15, 2002Edition Number: 3Section / Paragraph Reference: 41.1Subject: Mechanical Loading Test Deflection Param

3、eterDECISION:Paragraph 41.1 to be revised as follows:A module or panel and any mounting hardware supplied with the module or panel shall withstand a loadas shown in Figure 41.1 and specified in 41.2 for a period of 30 min, without evidence of structural ormechanical failure. Modules that are intende

4、d to be installed as part of a building wall or roof structure,and serve as primary members of that building wall or roof structure, shall not have a deflection of morethan L/240; where L is equal to the clear span length in feet of the deflected member. All glazingmaterials shall be of such strengt

5、h as to withstand the loads specified in 41.2.Exception: Modules that are intended to be installed as part of a building wall or roof structure only inapplications where they do not serve as a member of the building primary structural frame shall besubjected to the Mechanical Loading Test based on 1

6、00% and 150% of the manufacturers rated load andcomply with 41.3. Lateral (center of glass) deflections under the 100% load shall be measured andreported in the instruction manual.Paragraph 41.3 to be added as follows:41.3 Upon completion of the Mechanical Loading Test as described in 41.1 and 41.2

7、for modules that areintended to be installed as part of a building wall or roof structure only in applications where they do notserve as a member of the building primary structural frame, a repeat of the Voltage, Current and PowerMeasurements Test is to be conducted as described in Section 20. Value

8、s of the initial voltage, currentand power shall not differ from the measured values in the repeated test to the degree that there isevidence of internal damage to the module as a result of the loading.Paragraph 48.7 to be added as follows:48.7 The Installation Instructions for modules that are inte

9、nded to be installed as part of a building wall orroof structure only in applications where they do not serve as a member of the building primary structuralframe shall include:a) a statement indicating the modules are for use only in applications where they do not serveas a member of the building pr

10、imary structural frame; andb) the positive and negative test loads, and the measured lateral deflections while exposed tothe 100% test loads as described in Section 41.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULRATIONALE FOR DECISION:The

11、L/240 deflection limit applies only to primary structural frame members supporting non-plaster ceilingsof roof structures as defined in Chapter 16 of the International Building Code.The new approach is being offered for modules that are intended to be installed as a part of a buildingwall or roof st

12、ructure only in applications where they do not serve as a member of the building primarystructural frame. In this case, the determination of the acceptability will be based on the loading rating,the application of the module in the building, and the application of the building code within the jurisd

13、ictionby the building official. The Mechanical Loading Test will be based on the manufacturers rated value fordesign load. Reporting of the load and deflections will provide information for designers and buildingofficials to determine the acceptable uses.The additional Voltage, Current and Power Mea

14、surements Test is to demonstrate that the cells were notdamaged when subjected to the test load defined in Section 41. Damaged cells may lead to cracks orother openings in the electrical circuit, which in turn lead to a fire hazard due to arcing.Copyright 2010 Underwriters Laboratories Inc.UL, in pe

15、rforming its functions in accordance with its objectives, does not guarantee or warrant thecorrectness of Certification Requirement Decisions it may issue or that they will be recognized or adoptedby anyone. Certification Requirement Decisions are the opinion of Underwriters Laboratories Inc. inprac

16、tically 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 Certification Requirement Decisions by anyone. UL shall no

17、t 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 the current version and previously printed copies may be outdated.This document is published as a service to ULs certification customersSTANDARD NUMBER: UL 1703 -2-