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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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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 |6 K1 F" e, x
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.
& R# S4 O$ s, N9 r2 y第二步:器具是 is in overvoltage catergory II,- H' O S( k) I8 h2 |% X/ `2 _, r
rated voltage 假定220-240V, so the overvoltage is 2500V.9 r0 f- [; \; ?
step 3: for cr (see table 16)+ ~# y7 [6 f8 N1 C: x4 X
; a2 Z' }8 a0 w5 {- | For basic insulation (clearance), there are two limit existed, 1.5mm for general basic insulation and 1.0mm for tubular heater+ ~+ y* [ h( r. D
For supplementary insulation, it is same with basic insulation+ {* w/ E- g4 {9 K
For reinforced insulation, the higher step limit apply from table 16, that means the value for Overvoltage 4000V applies, it is 3.0mm) X" \3 w: [; `, t' u! R8 a
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step 4: For Creepage " _2 \6 ]* y4 U( C1 w# L7 A h5 F
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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.1 g* ], c, @! R( m4 b, S
there are two limit existed, 4.0mm for general basic insulation and 1.0mm for tubular heater.6 N; H: S& @# c. ~
Supplementary insulation is same with basic general requirement
+ y# v$ n1 y I/ p9 fReinforced insulation is double the basic insulation.( o$ L2 f. e. k* V% Y4 c
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Please Bear in mind, above analyse is based on Class I.6 i. Y0 Z3 U# |3 ]3 o8 h k/ }
6 k" p$ T3 k5 O6 k7 ~Next 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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