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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。; x; I2 V; i3 V+ j- Q
- L0 M5 Q4 N5 z* w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)。
3 @7 t: ]* E$ ?* m9 m$ j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.) a8 c+ i6 ~( j0 c
第二步：器具是 is in overvoltage catergory II,! p* D- l7 x$ W' [8 W1 d' A
rated voltage 假定220-240V, so the overvoltage is 2500V.
0 r8 X. f& r, C+ Z6 ~( rstep 3: for cr (see table 16)
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- f! J$ o/ f; b1 H3 n' e For basic insulation (clearance), there are two limit existed, 1.5mm for general basic insulation and 1.0mm for tubular heater. i& ~- \& S( U5 M W$ y
For supplementary insulation, it is same with basic insulation) h7 ~. r* X: g8 A
For reinforced insulation, the higher step limit apply from table 16, that means the value for Overvoltage 4000V applies, it is 3.0mm1 _( t5 {+ M" y0 k
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step 4: For Creepage
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9 `# b3 L8 g2 K* y1 v* B3 Gfor 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.
' n) s7 {( F) u& N; N- k; t& \/ Ethere are two limit existed, 4.0mm for general basic insulation and 1.0mm for tubular heater.9 d, ]. T: X" Z
Supplementary insulation is same with basic general requirement
O [# A4 L8 D- `& H4 W9 BReinforced insulation is double the basic insulation.
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2 g' g& B0 M$ P$ O1 B3 A9 gPlease Bear in mind, above analyse is based on Class I.
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: o4 y: ]/ o* [4 \3 d: f+ ?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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发表于 2008-8-12 16:08
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