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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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* h- Y" J) Q$ [, @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)。4 a3 v1 k1 d/ n# [7 ?) A
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.4 `/ ?, _- w9 C7 V. \2 x# E8 y
第二步:器具是 is in overvoltage catergory II,
: @3 k/ l5 J) n$ ?* P rated voltage 假定220-240V, so the overvoltage is 2500V.& L# v) i; I; L
step 3: for cr (see table 16). ?8 L6 \) w8 j, z2 }, d
: a* K4 N) q. h& e: ~ For basic insulation (clearance), there are two limit existed, 1.5mm for general basic insulation and 1.0mm for tubular heater
o ?4 ?& t0 |, c* i For supplementary insulation, it is same with basic insulation
6 z" d- u7 r* f( g+ Q% Q8 S 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 & @6 }( j, g7 s5 b1 s. O) H( U
6 f5 F$ a5 C1 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.
' d7 d5 G+ E8 T0 T; [there are two limit existed, 4.0mm for general basic insulation and 1.0mm for tubular heater.
8 ^) t& O6 N# W7 a+ mSupplementary insulation is same with basic general requirement' g" Y$ s* p2 T7 o; S8 o4 P
Reinforced insulation is double the basic insulation.2 g; s' A7 ?+ P6 V/ S1 {% I
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Please 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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