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标题: DSH 494 Construction [打印本页]

作者: 小米    时间: 2012-9-11 11:25
标题: DSH 494 Construction
DSH 4948 I: {, c$ R; g& }3 J' y& s* `

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Construction9 }" o8 o4 h3 ]" `; Z" w& E! U
22.42- `7 c/ L; S" F3 g# e! p
60335-1(ed.3)! V8 P' Y8 u! Q, K: T' C& f
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Standard: IEC 60335-1:1991, 3rd Ed.$ D; ?- T% ?( t& B( P% c' W
Sub clause: 22.42
) e/ M% m$ |& E' i+ v# W0 |) FSheet No. DSH-494
8 U. R  ]7 L' f1 iSubject: Construction
* L8 r0 T5 G$ A3 mKey words: - Protective impedance - Y1 capacitor0 [* u1 x  C  b) \* s, Z0 c
Decision taken at the 40th CTL meeting 2003
+ T9 w( V7 h6 Q/ W. ^+ lQuestion:( o& @4 m" O6 u1 f( X3 M0 E% s' P$ _9 q
Can a capacitor be used as a protective impedance?5 H8 T( ~4 C: v, X& u
Rationale:
; d8 \2 g. U" p  l3 n# }0 @+ h4 f2 mSee question.
3 K, p/ N  }8 k' ~Decision:
8 P- d9 N9 f& o8 e/ L  V% [, ~A single Y1 capacitor is not allowed as a protective impedance.
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[attach]75828[/attach]! w9 p& @! n1 _. {





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