|
|
对于IEC60335-1其实个人觉得最重要的几个关键词: 带电部件 可触及部件 还有绝缘/器具的分类几个概念。! C# z* C: k2 L& F# H
) M' p7 m& {0 j2 C4 `0 i/ L
对于任何一个产品，我们第一步要确定的是绝缘的类型：basic/supplementary/reinforced(double) insulation. 在对此判定的前面，我们必须考虑器具的类型（class 0, I, II III)。' s' `4 L( z% j) m9 E3 u: w& u& J. n$ l
以我们熟悉的无线水壶为例子。以(Strix connector)， 带地线.金属外壳，我们的第一印象，Class I appliance.# V; `$ e9 ~/ j
第二步：器具是 is in overvoltage catergory II,- u" B' ], O4 N3 b8 I) w
rated voltage 假定220-240V, so the overvoltage is 2500V.
! l, A* _. t( M; T2 i+ r9 lstep 3: for cr (see table 16)4 k* x# g- ?* B) v, _
" J+ y1 L% S$ s6 V; L
For basic insulation (clearance), there are two limit existed, 1.5mm for general basic insulation and 1.0mm for tubular heater5 g V: A8 X1 Q$ L' Z% J0 K; f
For supplementary insulation, it is same with basic insulation! g2 p6 q7 ]9 m% j
For reinforced insulation, the higher step limit apply from table 16, that means the value for Overvoltage 4000V applies, it is 3.0mm
+ x8 y# D4 e0 x& O: W. e" g( J7 K" `/ X
step 4: For Creepage
1 M# K6 p# R6 k6 P9 W% s
3 f1 ^$ y& u7 `/ o( [: ifor basic insulation: see table 17, usaally we can determine the appliance pollution degree from concerned part 2( see -2-15 for kettle), it is pollution degree IIII. and material group IIIa/IIIb.
/ n `* W6 G# z0 n, Y! Pthere are two limit existed, 4.0mm for general basic insulation and 1.0mm for tubular heater.
, O3 P9 A& a2 t9 A. I8 v2 G, F0 Y" CSupplementary insulation is same with basic general requirement
# d# V& C3 t7 Q7 ?5 {+ ZReinforced insulation is double the basic insulation.. X* \, Q2 A/ ?- g$ ^7 x8 G
9 |+ c5 R5 l# n- v$ |Please Bear in mind, above analyse is based on Class I.
7 V. ]: R3 C2 @! \5 v* k& @' [1 l" ?
3 o2 I& p1 k9 u4 n. ]Next stage, i will prove to you if the appliance is sold to Japan as class 0 or class 01, what will happen. |
|
/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 2008-8-12 16:08
显身卡
