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最近刚做完几款HID嵌灯,发现一个问题,UL153中限制灯泡的实际功率不能超过5%,但有一个例外情况,UL1598却没有此例外,UL1574更奇怪,54.2.2与54.2.3有什么不同?7 _2 r x7 F5 S( k! w% P
54.2.2 A nominal system for an HID luminaire assembly shall be a combination of components such that, when connected to the supply voltage rated for the ballast and measured as specified in 54.2.3, the lamp operates at its marked wattage rating ±5 percent. The capacitance of the capacitor is to be within ±5 percent of the capacitance rated for the ballast.4 O0 o. K, L. Z/ F7 N
Exception: A lamp need not operate within ± 5 percent of its marked rating when operated by a balast intended to operate the lamp at other than the lamp’s marked rating. Such a construction is to be documented by the ballast manufacturer.7 ] h! \0 X) H" ^' ?! q
54.2.3 The test lamp, when evaluated in open air, using the same ballast and capacitor that will be used in the luminaire shall operate within 5 percent of the rated lamp wattage, after a 15 minute stabilization period. The voltage may be adjusted to be within the 5 percent range, and this voltage shall be used as the test voltage. f+ K8 X7 E3 ?: v/ [8 A
另外,镇流器的输出测试应该使用什么仪器? |
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