DSH 506 Creepage distances, clearances and distances through insulation

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DSH 506 2 Q! W0 ~8 `  {3 V9 f

Creepage distances, clearances and distances through insulation 2 g/ p4 r! \2 l# I: a+ _; \* G

29.2

60335-1(ed.3) 1 n3 v1 K( Y+ z, x2 c- ^0 z6 G# t0 J

; k+ B4 q( R9 N5 \- ~Question:
What creepage and clearance distances apply across parts of same polarity when a cut out
* H" A# ^2 n: S# r2 ooperates during clause 19?
Rationale:
See question.
Decision:
In this situation the live parts of thermal cut out in the open position are considered as parts
( q$ ?( }$ ?! V  U' Gof different polarity.
0 m( R" W: X. `When 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
! Z9 V0 J! k0 H/ |$ T2 Wdistances are not measured because there is no open circuit and no parts of different polarity.

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