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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
- Y4 U4 f8 A2 c7 h* q" x2 h# L5 h+ n0 A结构部分的排水孔里有规定面积。
7 t2 N7 w V- U. p2 z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:
0 s+ l# q9 K- X' `4.17 Drain holes 3 ~/ Q' w$ {7 d* A
Drip-proof, rain-proof, splash-proof and jet-proof luminaires shall be so designed that if water . I0 f }7 h- J/ H8 n% N L, I1 ?
accumulates in the luminaire it can drain out effectively, for example by opening one or more & I, ]/ [$ m) \7 M. ]
drain holes. Watertight luminaires s hall have no provision for draining.
4 q2 t `% P/ {% e8 pCompliance is checked by inspection and by the tests of Section 9.
; J- R# |' O* s! e% a# s* L: H MNOTE 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.
1 n9 H: `5 E0 d; N* W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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