UL507吊扇扇叶负重如何测试
UL507吊扇的扇叶负重如何测试 那一章节有说明谢谢!UL 507第91章条款 91.4.1里面有描述 本帖最后由 kennykkou 于 2022-2-15 18:53 编辑
丁树文 发表于 2022-2-10 15:20
UL 507第91章条款 91.4.1里面有描述
丁先生非常非常谢谢再确认新版UL507没错是91.4 Fan blade brackets91.4.1 Static load test for ceiling-suspended fan blade brackets91.4.1.1 A blade bracket to be used on a ceiling-suspended fan shall besubjected to the static load testdescribed in 91.4.1.2. As a result of theload, the bracket shall have no cracks as determined by visualinspection with a4-power magnifying glass.91.4.1.2 The mounting feet of the blade bracket are to be fixed by a support,vise, or other securingmeans. The bracket is to be oriented as intended foractual use as illustrated in Figure 91.2. After securingthe bracket mounting feet, a crossbar is to be secured across the top ofthe two outermost blade mountingholes. The load is to be suspended from the centerof the crossbar for one minute as illustrated in Figure91.2. The combined weight of the crossbar, load, and means of load suspensionis to be in accordancewith Table 91.1.Exception: Ifthe blade bracket construction is such that it is integral to the motorenclosure and attachedto the overall motor assembly upon shipment, the bladebrackets/motor enclosure can remain attached tothe motor assembly during testing.
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