|
|
songbolove 发表于 2012-2-2 09:12 
4 r% }% ~. {5 _+ T以GB7000.5 道路与街路照明灯具为例：$ {+ r3 ^( {, l, D! P8 H8 f7 q9 l' |
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， ...
c) no trace of water on current-carrying parts or SELV parts where the voltage under load
, g E ~7 P% j b0 c) @5 \exceeds 12 V r.m.s. or 30 V ripple-free d.c. or on insulation where it could become a hazard( O) k* D3 l0 f1 X) G
for the user or surroundings, for example, where it could reduce the creepage distances1 S% x% e }0 J$ [
below the values specified in Section 11;
) _2 X6 ?% H+ a) Nd) 1) For luminaires without drain holes, there shall be no water entry.
- |! ]+ n/ _7 t$ O1 S+ f$ B* VNOTE Care should be taken not to mistake condensation for water entry.
5 j4 r7 r+ q' X/ Z( o/ U2) For luminaires with drain holes, water entry including condensation is allowed during the
, x5 q" s# a( V! W$ R: `$ ytests if it can drain out effectively and provided it does not reduce the creepage and
, N/ b% k+ P1 Rclearance distances below the minimum levels specified in the standard;$ @% g5 U: ~* y! ~
还需考虑电压在12 V r.m.s. or 30 V ripple-free d.c. 的SELV parts |
|
/1 
|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