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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 ) v" K) Z- U! t- V4 e
结构部分的排水孔里有规定面积。 3 o- o7 c# y: C: o- {, u4 Y
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:* {5 K. m: v2 X- |5 I
4.17 Drain holes 7 ?# ]5 |! N! v* ^+ C/ C
Drip-proof, rain-proof, splash-proof and jet-proof luminaires shall be so designed that if water
$ U) m/ l' J9 d% g7 O; paccumulates in the luminaire it can drain out effectively, for example by opening one or more
$ d' z' [/ m1 k' zdrain holes. Watertight luminaires s hall have no provision for draining.
C+ n: R/ |' Q9 nCompliance is checked by inspection and by the tests of Section 9. 1 i8 _0 ?! e6 j" l, q+ d; J
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.
) C! c# X: g( _# L, [* ?- u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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