DSH 537 PCB layer transformers

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DSH 537

PCB layer transformers

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60601-1(ed.2);am1;am2 # ]$ ~1 x- j2 V5 m

Standard(s)- (year and edition):
IEC 60601-1:1988 Ed.2
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Sub clause(s):
4 B: W7 {8 j) }$ w1 dGeneral
Sheet n°: 537
Subject:
6 }$ C/ Q2 U" _PCB layer transformers,
0 u- j5 m# T% k! ~$ d+ P. ?Key words:
PCB layer transformers
Decision taken at the 40th
meeting 2003
) o. P2 K0 b& F7 H0 tQuestion:
What requirements are needed for PCB layer transformers using etched windings?
! t% J5 V& L4 F% L' a/ CDecision:
9 v1 a: N% e; y8 Y# XThe requirements of the IEC 60601:1988 Ed.2 should be used with regard to creepage distances and
isolation distances through thickness.
5 k6 X$ {6 {. c& y7 r/ UExplanatory notes:
This issue will be put forward to TC 66 and TC62 to deal with this specific problem. In the meantime a
' d4 U: M* |! }- |5 ^- Wtemperature cycling test according to IEC 60950 can be used for reference. Base for this test are the
( \* x- D+ A% e. |' s# Y% htemperatures retrieved during normal condition tests calculated/adjusted to an ambient of 40 °C. It is
: s) ^# A6 O* c. ^important that the influence of the temperature of other components shall be taken into consideration.
" T3 F% f. j+ u' I/ o7 R' TThe minimum thickness through insulation can be taken as from IEC 60950, being 0,4 mm.
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