DSH 405 Leakage current in secondary circuits

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DSH 405

Leakage current in secondary circuits 7 h2 a; B& a6 G& J1 }& X2 _

17g)

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

# j/ Z$ g. [7 {Standard(s)- (year and edition):
2 |7 O5 F% e9 L" T% x( `IEC 60601-1:1988 Ed.2 Am1+Am2
: Z) ]/ Y( ]- K' z2 m6 V0 kSub clause(s): 17 g)
; q! R  p2 F- k" tSheet n°: DSH-405
Subject: Leakage current in secondary circuits
5 c# b" J: }" K- tKey words: Leakage current, secondary circuit
( p! ?+ s' X+ @4 m- P0 O8 l( aConfirmed by CTL at its 39th meeting, in Cologne
+ C% f( F1 u: h8 P( i% m9 l8 DQuestion:
If secondary circuit impedances limit the leakage current, is further investigation of secondary
, L1 M, v5 j2 l. w. u3 Lcircuits required? (refer to sub-clause 52.5).
# g; [. s9 z1 K& S  g; rDecision:
+ K( v  P8 v) k* _% G: DSecondary circuits providing protective means after short-circuiting of inadequate AIR
CLEARANCE 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.

9 H/ C. v- D& A+ X$ A