|
|
% ]8 v% ~% {7 t' J! E
Standard(s)- (year and edition):% o0 l o/ `2 C" H' Y7 D4 ~
IEC 60601-1:1988 Ed.2 Am1+Am2
6 U& v' X/ Y, _5 \( S; X: MSub clause(s): 17 a) and 17 g). k1 I! n; I! g, j5 R5 P
Sheet n°: DSH-399
; o' ^( u: B) C; \0 iSubject: Component impedance
( I/ W& @0 J( MKey words: Component impedance, high integrity9 ~7 l q g( N: `& }& i/ S- w
Confirmed by CTL at its 39th meeting, in Cologne# n4 J4 a, H2 S0 V1 Q
Question:1 T3 A: m" Z6 K$ k9 M7 x; L: m
Component impedance is generally unreliable. Components certified to IEC 60384-14 etc. can8 X1 c$ A+ K' G+ f: y$ F; `
be considered of high integrity. Is the impedance of a component sufficient? Does investigation4 h- @8 Y. z" B+ N
of the product require further review of AIR CLEARANCE and CREEPAGE DISTANCE for such
/ W5 g5 U. K) s0 e+ h+ Ka component? Does this sub-clause mean that further component review is not required?' s. H, c0 e* i
Decision:! {: x3 |5 f$ Q( S7 f* u5 d+ |7 m
Secondary circuits providing protective means after short-circuiting of inadequate AIR
1 U4 W. G# E4 sCLEARANCE and CREEPAGE DISTANCE must be investigated. Failure of components in
. v) \) j2 t# F( ~& n5 i4 _2 y4 g$ nthese circuits shall be investigated as a SINGLE FAULT CONDITION
! j2 u- ?$ x. b7 Y l/ }( N( A
+ W# G' _+ v4 d- P: O9 ]7 x; p: Y) p3 ?# V/ H! ]
|
本帖子中包含更多资源
您需要 登录 才可以下载或查看，没有帐号？注册安规
x
|
/2 
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 ) 
窥视卡
雷达卡
发表于 2012-11-5 11:51
收藏
分享
好帖
鸡蛋
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡