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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 $ ?2 r7 T+ y& i% Y2 @# I0 x! c
结构部分的排水孔里有规定面积。
3 ]7 O, S# M4 k* Z1 ?% 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:
! Y6 D: a, N+ v V, m9 g) ]4.17 Drain holes + m% ?0 H/ s# o. H
Drip-proof, rain-proof, splash-proof and jet-proof luminaires shall be so designed that if water - ?8 ^! Z. i) a
accumulates in the luminaire it can drain out effectively, for example by opening one or more
; c- [2 o: t; F" s2 L6 j% bdrain holes. Watertight luminaires s hall have no provision for draining. 2 n5 }0 K9 S& u/ e1 H4 R6 w
Compliance is checked by inspection and by the tests of Section 9. + Z4 f3 n3 `% y3 ?4 @2 k1 n
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. : e$ a; l& q4 N: h% f4 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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