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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 + [' t% v3 Y V/ D
结构部分的排水孔里有规定面积。
1 n1 h; V2 f0 u; j8 V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:
7 S! M- I+ n$ Y$ L) y( D5 ^: ]4.17 Drain holes
2 T/ G; M8 D. Y, L& I7 l6 DDrip-proof, rain-proof, splash-proof and jet-proof luminaires shall be so designed that if water
- s& n% \: A4 X5 G: T; Kaccumulates in the luminaire it can drain out effectively, for example by opening one or more : w' k5 g8 j6 ^. |
drain holes. Watertight luminaires s hall have no provision for draining.
7 Q2 w0 m# O- L1 W" b9 I1 ]* ZCompliance is checked by inspection and by the tests of Section 9. 9 [3 o3 @0 f# C' _
NOTE 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. * ?& g& D K$ \" S8 @) O- `5 _) C
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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