DSH 399 Component impedance

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无绳壶无绳电熨斗插拔寿命试验机

IEC60335试验指甲

小型摆管淋雨试验机

IPX5X6X7喷水试验机

1000L恒温恒湿箱

各种试验指现货

可程式恒温恒湿试验箱

水平垂直燃烧机

自动卷线器试验机

耐划痕试验机

各种灯头量规现货

灼热丝试验机现货

GB1002插头量规

IPX1-X7淋雨现货

IEC61347/UL935镇流器热试验箱

灯具防风罩

IK冲击试验机

UL498插头插座量规

VDE0620插头插座量规

稳定性试验台

家电温升测试角

针焰试验机现货

热电偶焊机现货

家电125mm试验指

E12灯头量规

无绳壶无绳电熨斗插拔寿命试验机

IEC60335试验指甲

DSH 399 1 o  _6 S7 M+ @% F

Component impedance

17a) and 17g)

60601-1(ed.2);am1;am2

Standard(s)- (year and edition):
* I- W, _# s8 q3 M; TIEC 60601-1:1988 Ed.2 Am1+Am2
Sub clause(s): 17 a) and 17 g)
1 |" N4 z+ b' Z! Q' k6 wSheet n°: DSH-399
Subject: Component impedance
Key words: Component impedance, high integrity
Confirmed by CTL at its 39th meeting, in Cologne
5 Z# `2 s7 B, s' C2 E  v( p: }! nQuestion:
Component impedance is generally unreliable. Components certified to IEC 60384-14 etc. can
be considered of high integrity. Is the impedance of a component sufficient? Does investigation
of the product require further review of AIR CLEARANCE and CREEPAGE DISTANCE for such
# R: T6 r: I3 B  D5 I2 @a component? Does this sub-clause mean that further component review is not required?
4 ?, d$ x3 d5 s& j& l: cDecision:
Secondary circuits providing protective means after short-circuiting of inadequate AIR
" `% w7 {/ l( U9 s" `/ f. h; vCLEARANCE and CREEPAGE DISTANCE must be investigated. Failure of components in
these circuits shall be investigated as a SINGLE FAULT CONDITION
0 U+ g$ `! C1 i- i+ @
: K( Z; `, N' _0 R7 z0 x4 x