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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
( M: y1 |6 _9 J$ J8 T. w* K结构部分的排水孔里有规定面积。
1 W) o! J1 |) D$ X0 P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:
' R) t$ `1 S, _4 Z9 A7 v$ G4.17 Drain holes
' J9 |) R6 n9 `* M# T1 zDrip-proof, rain-proof, splash-proof and jet-proof luminaires shall be so designed that if water
- T0 t' \% q4 b$ K1 @+ Qaccumulates in the luminaire it can drain out effectively, for example by opening one or more 9 O! q* U$ G- _; \. x
drain holes. Watertight luminaires s hall have no provision for draining.
( Q& g9 [+ M; [* O! V) hCompliance is checked by inspection and by the tests of Section 9. $ Y. {3 C% T+ L! l
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.
/ ?# O; x& P( i, l' d- w; L) ]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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