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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。* t) g; `# F4 e# `
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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)。% t h8 D2 [% P; j6 U
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.1 V. s6 Y7 N! Y/ D# h) Q% W/ [# b
第二步:器具是 is in overvoltage catergory II,' D2 p7 n, X. Y& ^2 O0 p
rated voltage 假定220-240V, so the overvoltage is 2500V.' y4 `% j* \. ^# M
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: m0 C& n( B* F7 `
For supplementary insulation, it is same with basic insulation0 P4 `! e1 X, k2 m3 x8 Q1 F
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 : t: Y1 A; C1 [* v7 E& S& k
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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.2 S3 D. @8 H9 N5 P& y- l
there are two limit existed, 4.0mm for general basic insulation and 1.0mm for tubular heater.4 m, ]" D3 d2 e: n9 M
Supplementary insulation is same with basic general requirement$ K' I2 I3 e R. k i; L, W5 @# M
Reinforced insulation is double the basic insulation.
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+ N: x/ ]! W7 Z$ [7 V/ TPlease Bear in mind, above analyse is based on Class I.
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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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