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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
1 ^4 n* J$ X5 [6 R/ P: J. H结构部分的排水孔里有规定面积。 4 e3 [% u7 Z- X* F- {7 \
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:( x) U# D3 t) d V# c
4.17 Drain holes + u. s# q3 L# p, V6 _! C( n
Drip-proof, rain-proof, splash-proof and jet-proof luminaires shall be so designed that if water
+ ?. f. b$ k: l- I1 s. c2 Uaccumulates in the luminaire it can drain out effectively, for example by opening one or more
& l" P; M5 ]2 H) r2 Hdrain holes. Watertight luminaires s hall have no provision for draining. 0 S; n- l8 J& Y$ {
Compliance is checked by inspection and by the tests of Section 9. 8 K: {1 X; i0 Z" ~, b
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.
5 O, P0 D+ N; x1 h% Y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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