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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)。
, ]9 I1 {* J$ U& H7 [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.0 H2 G/ [) B: Y0 O' E
第二步:器具是 is in overvoltage catergory II,* H2 w3 m! x8 k/ n9 i# c5 |# ~# }
rated voltage 假定220-240V, so the overvoltage is 2500V.
( h6 G$ D5 S0 Bstep 3: for cr (see table 16)% J# {( p1 s% l: u; C, p
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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) L" v3 F9 W5 u* V1 R' m" n; D6 J3 Y! }( p; s
For supplementary insulation, it is same with basic insulation
( c/ A$ c8 ^7 I: p- ~ For reinforced insulation, the higher step limit apply from table 16, that means the value for Overvoltage 4000V applies, it is 3.0mm
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step 4: For Creepage ( g2 P3 o& ^; {/ }1 |
V" ]" ?) b, t7 }5 T; Sfor 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.' i# Q+ O% _- p5 T, v- q
there are two limit existed, 4.0mm for general basic insulation and 1.0mm for tubular heater.- }4 `% L- H& t1 D: b/ ?
Supplementary insulation is same with basic general requirement
k* a* m: L- F+ q+ F) jReinforced insulation is double the basic insulation.
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Please Bear in mind, above analyse is based on Class I.
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6 o+ W7 v# E6 `) z% hNext 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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