|
|
songbolove 发表于 2012-2-2 09:12 
3 t" [" a9 k; w6 k以GB7000.5 道路与街路照明灯具为例：
- C$ _& }7 O2 Z7 ?5 y第12.2 “对于IP数字大于IP20的灯具，应在GB7000.1第9章的9.2之后， ...
6 B2 O- ^ \- F- P! l4 f! lc) no trace of water on current-carrying parts or SELV parts where the voltage under load( k) n$ I( U3 \+ N0 J4 ~
exceeds 12 V r.m.s. or 30 V ripple-free d.c. or on insulation where it could become a hazard5 F% k2 P( c. x
for the user or surroundings, for example, where it could reduce the creepage distances- a; C; L- ?. W+ B9 N- M/ R( Y# b- x
below the values specified in Section 11;
) B+ b$ }8 y8 o* j r, K5 ]/ ad) 1) For luminaires without drain holes, there shall be no water entry.) }, Q3 P5 a- m7 S2 X2 m0 `
NOTE Care should be taken not to mistake condensation for water entry.
; J: S8 Q7 ?8 l+ }* K2) For luminaires with drain holes, water entry including condensation is allowed during the6 Y, Z7 M; _) H+ w. E: y" w* a/ e6 c) r
tests if it can drain out effectively and provided it does not reduce the creepage and
3 P$ k( Y, f* R2 pclearance distances below the minimum levels specified in the standard;
5 z+ Z9 N. E, z6 ~. u) @+ _& d4 x还需考虑电压在12 V r.m.s. or 30 V ripple-free d.c. 的SELV parts |
|
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 )
窥视卡
雷达卡
发表于 2012-4-29 13:36
显身卡