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3 K6 _0 l: Z+ N- g I
6 r$ V% U: F/ c0 M: N8 I
| Protective Impedance# M9 _8 [2 B' l. J% g
| 6.5.3' n( R' j6 r8 Y# L/ f. M( _
| 61010-1(ed.1);am1;am2
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1 _3 R( ^. O7 R4 h2 r" g) D" `! l2 J: K
Standard:& ^6 S4 U+ X1 F+ N% T8 U
IEC 61010-1:19906 U* L: P" W7 J- ?! ~
+A1:1992+A2:1995& U. L- p* r9 K/ \/ N3 G9 a( W: F
Sub clause:0 H( w6 P( N+ r' ^. v, l
6.5.3
2 W/ l' \% z3 a6 t( d9 \, V; E6 ~Sheet n. 300& R* y! t" s% u7 J" O8 n3 T
Page 1(1)8 N4 Z8 L& R* X0 r, \* ^
Subject:- W @0 y6 W0 \: h4 b$ n% z1 a" {
Protective Impedance1 ~; W$ {3 h+ C% u
Key words:% Y F4 F; A! H6 {
- Shock
$ o4 [. n1 z' J: T3 A( ?: Q5 ]- Impedance6 u. t2 Z5 e: s1 F. _
- Protective% U) y0 N- N% z2 T ]
Decision taken by
) c7 z9 U( x! O3 M; {3 DETF3 and confirmed
+ C2 {( w& n& u; Iby CTL at its 38th
5 {* G5 T/ V/ P( K4 y7 @) smeeting, in Toronto
4 }. @ C& j8 ^& Y' y3 \Question:0 _8 K: l+ A% n5 \
Where a component acts as protective impedance in single fault condition, should it be rated
0 r+ C0 p# A7 E% v' c4 }, F4 ofor this function? An example is a component in an accessible secondary circuit which may
( x3 O5 K' J9 ]# P) ebe made hazardous live by the failure of a creepage or clearance distance.
( Y+ a; V2 h) H# w! P8 y+ R4 JDecision:
7 X! `( h1 R8 CSuch components should be rated for the single fault condition.$ m0 n( `" O. a' e8 A' J
Explanation:
( K8 r3 j3 P, ZThe safety of the user will be dependent on the operation of these devices. It will, however,
2 X" L) r) w0 ~* lbe preferable for the design to avoid this circumstance as the integrity of the components is( c8 D5 t: p9 F% J6 Y! |# { s: W6 E
not defined.
1 e4 R1 [/ }/ I4 Y% a* B+ ?% x0 y7 `( W2 b* v! W }
: i) ?% f! w0 A5 H% [ d9 C0 C) P# A5 B
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发表于 2012-9-19 15:05
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