|
|
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。+ Q+ a, _9 R* f, I& ?
. b2 L' t% C1 b
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)。
* T1 a) j! F8 F' L5 `9 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.
& B! n+ Q" {# X" ]' `3 J. P第二步：器具是 is in overvoltage catergory II,
6 I: w8 T* R- f+ [! L- f4 ] rated voltage 假定220-240V, so the overvoltage is 2500V.: m- u# `) _+ e: S% A
step 3: for cr (see table 16)
- V. Q1 n( H2 g) \( o. C) ]# I/ a* F2 d; z
For basic insulation (clearance), there are two limit existed, 1.5mm for general basic insulation and 1.0mm for tubular heater
: a; c" J: W: J1 c For supplementary insulation, it is same with basic insulation# j- y( _! B* p& F) M: C4 d
For reinforced insulation, the higher step limit apply from table 16, that means the value for Overvoltage 4000V applies, it is 3.0mm
3 I2 T& ^& h4 o( s7 H
3 x! A* l( G( x& G3 ?2 Rstep 4: For Creepage 8 ?2 {! c. e0 |* e' P
% u' y# C/ V7 Z, ufor 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.% l1 e+ m' P' K/ F
there are two limit existed, 4.0mm for general basic insulation and 1.0mm for tubular heater.
0 U) T8 J4 V9 J. @Supplementary insulation is same with basic general requirement9 Y* L4 {0 v. o- d y
Reinforced insulation is double the basic insulation.
2 |) g' U L" o2 k
: A; b, N4 t: R( k% j8 z( H% bPlease Bear in mind, above analyse is based on Class I.
& o% I3 P* N) Q% s, j3 W& }9 q N! d/ e i+ W2 r' {" I. Y
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
