|
|
$ \9 x2 Z- ?( B/ L2 w
5 G4 A. h2 y; R! l5 A0 d' a DSH 300
3 ~5 f7 `* Q+ h, U! o' f. { | Protective Impedance1 z, J) r- W6 j* s
| 6.5.3
3 c, O# Z) C& c# R | 61010-1(ed.1);am1;am29 O) j) }5 t2 B
|
3 R& O3 Q$ ^5 i
: l: R' [6 D) ?9 m, |" u- J. N
Standard:
& L/ \6 U$ W3 }0 U: j$ s, KIEC 61010-1:1990* }5 u, Z7 d: i; u' ?
+A1:1992+A2:1995, X: v% {$ Q0 S# v8 g
Sub clause:2 O5 W2 R8 X8 A+ t1 I
6.5.3( P% @! u9 i8 V/ c/ D
Sheet n. 3002 x" A- f" s3 F: K, R# s |9 C
Page 1(1)
, k0 u% @) z2 JSubject:
6 ~+ y7 d" f9 v* @' u- T3 fProtective Impedance& { \2 H+ x' H" y0 [) N
Key words:8 b" o9 w' X' l7 g* M
- Shock
3 D, T9 O' D# V- G- Impedance; P$ h) ]& V6 B" A+ |- x! z- C4 C
- Protective
" H( P% G% l" X# I" U1 LDecision taken by
0 _. m; I6 [, o! R. [$ h/ EETF3 and confirmed
% ]) |4 L. y0 T6 cby CTL at its 38th
! `- W3 q+ }# p" [5 L* ?/ W$ }meeting, in Toronto
7 }- L; m8 {' m) I7 h7 kQuestion:5 i5 _3 G U2 A1 F, n9 v# s7 ]4 H
Where a component acts as protective impedance in single fault condition, should it be rated, A! c( B7 P% ]/ I7 B& |
for this function? An example is a component in an accessible secondary circuit which may
* [9 ]6 x% V4 G7 \1 L% @6 n4 Tbe made hazardous live by the failure of a creepage or clearance distance.: E- v# h- l( Y9 _2 R- T
Decision:7 V2 R9 I) L! f' U( f
Such components should be rated for the single fault condition.' N) C- f# U( X3 t
Explanation:
9 `* Z5 r1 \! F8 ]The safety of the user will be dependent on the operation of these devices. It will, however,' |% j2 B$ f4 r6 z4 C
be preferable for the design to avoid this circumstance as the integrity of the components is! Z+ V B$ H8 }7 B0 y
not defined.2 P) M0 G2 F5 {1 g( p
7 z( K8 E2 ^8 d0 O* e( ~8 b% c
% s6 x- [* ?; v1 H1 j! R
2 O8 U1 \' i+ y: J, }2 R- t |
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 2012-9-19 15:05
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