|
|
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。: v2 J+ m3 i& u. B4 H
' u1 N1 N' i2 h$ l+ F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)。
- M, Y0 L8 _/ N: U- z' o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.
, z' y0 n. h" m( ? r第二步：器具是 is in overvoltage catergory II,6 _- E* ^) V" _3 b2 n% A# ], _
rated voltage 假定220-240V, so the overvoltage is 2500V.
, Q) P2 ]% j" k" ~9 v" {step 3: for cr (see table 16)
1 r7 [1 H9 f5 K8 `: u
7 b7 j: S" E5 A f8 G6 P For basic insulation (clearance), there are two limit existed, 1.5mm for general basic insulation and 1.0mm for tubular heater) g; _2 u% M" ?9 t B* P1 Z
For supplementary insulation, it is same with basic insulation
. V3 j* y% a8 u% A l For reinforced insulation, the higher step limit apply from table 16, that means the value for Overvoltage 4000V applies, it is 3.0mm
* s4 P9 p( v9 N0 c
; w7 c8 C7 b0 e$ t: Vstep 4: For Creepage
0 T& U* k& G, j
3 \' d# V" X# D! B% dfor 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." T' H0 C: Q$ w! t& ]$ b! [/ {
there are two limit existed, 4.0mm for general basic insulation and 1.0mm for tubular heater.
$ P- {& b7 s# r6 \Supplementary insulation is same with basic general requirement
' I* j$ f' M& }7 nReinforced insulation is double the basic insulation.
0 `# P W; l j7 @$ P8 n e$ K9 K3 v* j8 Y/ b9 E3 k
Please Bear in mind, above analyse is based on Class I.7 ~; J/ z6 p2 G6 n# J) v
# |8 t- n2 g/ c" F! t8 \
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
