DSH 405 Leakage current in secondary circuits

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DSH 405 & K0 ?& |8 l' u8 k& g! T

Leakage current in secondary circuits 2 W- h1 e$ O/ s2 b

17g) ! b& v1 ^: P0 r# s0 ~

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

/ }+ l  z3 N( c! T% J2 M6 `Standard(s)- (year and edition):
IEC 60601-1:1988 Ed.2 Am1+Am2
Sub clause(s): 17 g)
1 d3 @! _( @5 Q' hSheet n°: DSH-405
Subject: Leakage current in secondary circuits
9 s' f  e8 E1 V0 w& G+ x3 Q% UKey words: Leakage current, secondary circuit
$ O! m3 o' a, ZConfirmed by CTL at its 39th meeting, in Cologne
  w$ N9 h- V0 J5 zQuestion:
If secondary circuit impedances limit the leakage current, is further investigation of secondary
circuits required? (refer to sub-clause 52.5).
Decision:
7 t* Y3 {" P$ [; l1 G/ `Secondary circuits providing protective means after short-circuiting of inadequate AIR
- B6 q/ f# e) t9 ECLEARANCE and CREEPAGE DISTANCE must be investigated. Failure of components in
these circuits shall be investigated as a SINGLE FAULT CONDITION. Failure of such
components shall be investigated as a SINGLE FAULT CONDITION.

7 ]. Q' D  J' g' a$ K