DSH 587 Transformer intened to supply power to a saftey extra low voltage circui

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广东安规检测
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DSH 587

Transformer intened to supply power to a saftey extra low voltage circuit (SELV)

24.1 - `/ Y! ]4 s/ N, u2 T1 _- x

60730-1(ed.3);am1 2 a% e  P; P  T% j4 E5 M$ R1 y7 e

" y5 Y2 Y5 }/ l+ WQuestion:
2 B5 R- w/ |7 N4 p9 r" [0 YSub-clause 24.1 prescribes that “Transformers intended to supply power to a safety extra-low voltage
circuit (SELV) shall be of the safety isolating type and shall comply with the relevant requirements of
2 p1 h5 F* w+ t0 R' i6 s) IIEC 61558-2-6.”.
This prescription does not allow the use of other types of transformers not covered by IEC 61558-2-6.
2 S$ v; n% O( ~6 HIn case of testing of an electronic control with an integrated switch mode power supply (SMPS)
: I! y' ?5 B" `, t) r2 E8 c9 _$ fintended to supply power to a safety extra low voltage circuit (SELV), what requirements shall be
applied?
/ P$ h* L) x/ V5 o# i  F7 v) rDecision:
1 ~9 p- z4 v9 M0 \& j# CThe transformer shall comply with the relevant requirements of IEC 61558-2-17 for safety relating
$ b5 B/ N/ F% H( _6 ttransformers.
/ `  x& d7 W( R7 g5 z7 uThe entire switch mode power supply circuit (with the exception of the transformer) shall fulfil the
requirements of IEC 60730-1 and relevant Annex H.


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