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板凳
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发表于 2012-10-19 08:50
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wwnw_007 发表于 2012-10-19 08:38
* l2 T5 w. b1 b4 ^; o结构部分的排水孔里有规定面积。 1 v# a. j& a2 H0 o
结构部分并没有规定排水孔面积,不知道你指的是哪个标准。下面是IEC60598-1的第四章关于排水孔的描述:- {. D d7 ^ Z& c
4.17 Drain holes
7 I3 t- h# |* S/ a0 Y- v+ jDrip-proof, rain-proof, splash-proof and jet-proof luminaires shall be so designed that if water
9 L3 E" e3 Q3 J- W, A8 laccumulates in the luminaire it can drain out effectively, for example by opening one or more 1 u" u# n2 a& a5 A8 ?
drain holes. Watertight luminaires s hall have no provision for draining.
2 f8 I" L, S; ]$ r7 ^6 o# r# TCompliance is checked by inspection and by the tests of Section 9.
9 K L$ Z* J6 lNOTE A drain hole in the back of a luminaire for surface mounting is effective only if the design ensures a clearance of at least 5 mm from the mounting surface, for example, by means of projections from the back. 9 |5 s2 d( F/ d8 v0 P" ^
上面只提到了孔位应与安装表面有至少5mm的间隙,希望能够得到专业一点回答,不要笼统想当然的回答。 |
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