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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。
9 k1 }4 _0 q* B, R; q* b/ X4 A8 A- Z- B
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)。; y3 z5 E& m8 _
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.% I7 r( q. w2 K0 V
第二步：器具是 is in overvoltage catergory II,( T2 l: h/ S0 W' A
rated voltage 假定220-240V, so the overvoltage is 2500V.. H; A" C9 N6 o3 ?
step 3: for cr (see table 16)- t4 S1 R1 q4 S6 g
' S( x+ a) u/ I# S, k& h" q1 c
For basic insulation (clearance), there are two limit existed, 1.5mm for general basic insulation and 1.0mm for tubular heater" x# j, N- ]% S) Z, h6 o
For supplementary insulation, it is same with basic insulation
# T+ [& [& z+ a$ w 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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; T# U# ~, v( ?) e2 }step 4: For Creepage 6 }* D1 b/ @: J/ u1 {
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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.' y( A' z7 s9 Q0 Q+ k) j, W
there are two limit existed, 4.0mm for general basic insulation and 1.0mm for tubular heater.
( A0 ^# n' T* p. K7 SSupplementary insulation is same with basic general requirement
+ h$ [! k- r) R* [" v4 b5 x) nReinforced insulation is double the basic insulation.3 ~# C! L n; }/ Z4 E3 f# `8 Q% m
: M" J+ J2 L- d9 P l6 M6 NPlease 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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