DSH 506 Creepage distances, clearances and distances through insulation

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IEC60335试验指甲

DSH 506 & K3 K! Q) u" O5 D

Creepage distances, clearances and distances through insulation : z8 M9 ]4 \9 G) \% a

29.2

60335-1(ed.3) 5 n6 N& V7 S% [/ P% c/ k# w! N  b

Question:
. Y" S1 c/ {7 _4 q. `+ qWhat creepage and clearance distances apply across parts of same polarity when a cut out
operates during clause 19?
) Z3 y1 c8 }- ORationale:
! V5 y8 e! e- c- {; oSee question.
$ b) e! s  ~3 C. S- qDecision:
In this situation the live parts of thermal cut out in the open position are considered as parts
of different polarity.
  N! _6 H1 }3 L7 C4 H' }9 s6 q& yWhen measuring creepage and clearance, the distances should be checked according to the
component standard. If the cut out does not operate for all the tests of all clauses, the
distances are not measured because there is no open circuit and no parts of different polarity.

  L0 s8 @7 A6 f& s4 `/ M