标题: 安规申请中的一些典型问题 [打印本页] 作者: lucky 时间: 2007-9-1 14:06 标题: 安规申请中的一些典型问题 好久不来，变化巨大啊，发个贴先！ 9 U, B) M6 s8 v3 q( l( Y+ I G) u' k4 b
1、标志不当： 8 O$ c6 M: @9 q4 Q) q! [ ( B9 [' y5 s% C" X a.fuse marking ' T ]- G: j: @! d 1 j* v: h+ t% H# f/ ]2 ` b.power switch symbol6 V; L; m! ^" Y1 ~+ s, G
4 [! Z% d- |1 N7 p/ M& V) R8 y9 Q c.protective earth symbol. ]/ c2 l' n- E" O' ]' h& D/ b
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d.PE wire color% @; c& B5 V# ?- ]( w
( I* L$ L3 G: c- y# p( ?. C2.安全说明：/ J& E2 X P5 r4 @+ ?, F+ h0 o F
: g# A+ t5 x, Z1 J+ U a.Motltipower supply system # ?& M. G6 X! _0 h 7 e" X, K. D8 j0 ] b.protective earth connection instruction ! s, K O$ [/ L* _! g * Z$ d# T* o. ~8 F1 N; V- j c.High touch current warning label4 L" C' P$ A% B# a1 j" I
! B, n. M* s; m d.Hazardous voltage , i$ ^7 n |4 d% O) U- ^; S* T, {
3.绝缘距离：7 f1 a# D, O- l6 ]4 {# d* {2 _
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a.10N force requirement for all parts * p& `# Z" M! c( o! N 9 j8 O) `0 {5 s b.misunderstand bulk capacitor's insulation specifications( {2 m/ V& {: H* q' y5 z- Z
% c5 j1 u( l7 ?, U2 u c.Ill assembly) ^* B/ h! @/ b- z1 E1 [
Y7 V# U" A& j# D' y- i# A' U d.misunderstand fan wire's insulation feature ; d _. V/ E, [$ B: b; |6 J6 c. g4 ] ' v2 k) j' F) x e.transformer construction fail: margin tape width and turns of insulation tape3 v, [; Q4 _3 @! x# C- r. \
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4.资料和元器件：" f6 I% e+ u8 h7 H; N; z4 g. b
/ w# ^/ m: A$ T( ~9 {) E" p a.certificate out of validity5 F- O( k% I" n+ L5 U2 _
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b.misuse component certificate: UL and European standards different" W+ d8 p @7 }1 H* N$ Y
' A! ~7 s! _; q1 [3 T9 Q c.miss safety critical components in CDF: discharge resistors and bulk capacitor ' ]$ r8 R$ U3 b$ }5 `* T& U+ Y7 _. I0 [
d.misunderstand the requirements for safety critical components: not all safety critical components need certificate" |% |( U4 e7 u& |6 S% ~4 Y
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e.misunderstand components 4 f! y/ H4 ]/ w! i8 q( l% e ^7 m
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5.安规测试: ; P# c2 y6 s7 s. q 2 x+ u, [& m- n( M+ M# F E8 F a.Hi-pot fail, especially after 48hours' humidity treatment; \3 k* j& P% M* W. W7 d
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b.Touch current fail" }7 n* m; G M* c' e* m' @
% C& R* I" M: p7 S c.Output overload fail: temp. exceeded safety limit1 `3 m: N! c+ z& ~. x! Y
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d.Component fault simulation: temp.on transformer and output voltage exceeded safety limit1 K& S5 _% P7 {+ h9 r9 v
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6.设计更改和生产一致性: 4 \6 J5 n8 J: W* e( K' x# c3 Y4 M2 e; j5 c
a. Non-conformance between certification and production* S- |$ b6 g* `5 ^
5 n" E! r6 h" L' Ob. Label format % u, O+ r) O) x8 M- _% S6 i. j4 [$ |# X3 g
7.PCB Layout图提供不对，只提供了器件装配图，没有走线图。