DSH 537 PCB layer transformers

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DSH 537

PCB layer transformers

General 0 X5 V, y) h5 M3 @1 r  ~; w

60601-1(ed.2);am1;am2 + c' f& f1 x$ N' l5 f

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( ~8 E( `5 _' r0 m% iStandard(s)- (year and edition):
, J/ a% B" U# \IEC 60601-1:1988 Ed.2
- Q* d8 h. n- uAm1+Am2
Sub clause(s):
General
; h+ @' a. {+ Q' S# |/ GSheet n°: 537
Subject:
/ B5 {5 o8 ?" n# B0 sPCB layer transformers,
% f) ?% W  K# x0 q0 V# }" BKey words:
) }% B# L$ `) \2 J' z4 |PCB layer transformers
/ z& |1 H& e6 [& }& tDecision taken at the 40th
- \9 u3 Q0 ^- ?( X' l) [5 lmeeting 2003
Question:
What requirements are needed for PCB layer transformers using etched windings?
9 a: i$ y6 U* {! z1 E' B' cDecision:
The requirements of the IEC 60601:1988 Ed.2 should be used with regard to creepage distances and
isolation distances through thickness.
; \+ p! v# h5 I- g- O: cExplanatory notes:
This issue will be put forward to TC 66 and TC62 to deal with this specific problem. In the meantime a
temperature cycling test according to IEC 60950 can be used for reference. Base for this test are the
temperatures retrieved during normal condition tests calculated/adjusted to an ambient of 40 °C. It is
/ |% U& s0 ^/ U3 A. C  U7 Y* kimportant that the influence of the temperature of other components shall be taken into consideration.
6 L3 H9 q' a  A: y8 Z7 gThe minimum thickness through insulation can be taken as from IEC 60950, being 0,4 mm.


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