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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。
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" F+ `# N- b; z# p* ?( ^" E" 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)。
0 f7 N z0 K$ a7 f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.
, Y) o: ]9 c/ O+ V1 ?第二步:器具是 is in overvoltage catergory II,
9 D$ J* f7 w4 \ rated voltage 假定220-240V, so the overvoltage is 2500V.5 D/ B4 j8 n' j4 Z& ]/ g
step 3: for cr (see table 16)
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For basic insulation (clearance), there are two limit existed, 1.5mm for general basic insulation and 1.0mm for tubular heater
" y' f5 E9 K+ @& Q" K+ I3 U( @ For supplementary insulation, it is same with basic insulation
) U m& d' p( V4 O/ r2 m For reinforced insulation, the higher step limit apply from table 16, that means the value for Overvoltage 4000V applies, it is 3.0mm* b1 p( g4 Q; x- K4 U: \, ~: M5 Y/ y
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step 4: For Creepage 3 L+ q4 `7 p9 \( N% Y
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for 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.
& T3 ^0 `1 {, M+ O6 Ithere are two limit existed, 4.0mm for general basic insulation and 1.0mm for tubular heater.! J, Z% y- h5 n( _3 S' U1 o" E& f4 n& e
Supplementary insulation is same with basic general requirement
% d7 r8 r3 A5 sReinforced insulation is double the basic insulation.! ?! a9 |* j7 F4 C e) q0 R
& |1 ^$ Y/ f; IPlease Bear in mind, above analyse is based on Class I.( {& ^) M3 _8 M- N
$ [6 \7 C, {+ l, P& q2 v0 ]1 fNext stage, i will prove to you if the appliance is sold to Japan as class 0 or class 01, what will happen. |
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