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 3 [' x  Y- I( i. w; S. z( J3 n

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

24.1

60730-1(ed.3);am1

Question:
Sub-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
  r6 y- ]9 ]" J7 PIEC 61558-2-6.”.
4 A/ B5 J" x4 R# Y. o: Y4 vThis prescription does not allow the use of other types of transformers not covered by IEC 61558-2-6.
$ m1 Y0 D, C2 t4 Y2 Z, |& W6 PIn case of testing of an electronic control with an integrated switch mode power supply (SMPS)
) [. O6 m8 v0 B. {" u; W% c% \, P' jintended to supply power to a safety extra low voltage circuit (SELV), what requirements shall be
+ Z# C: ^  L  r2 m1 z" u$ @( Fapplied?
Decision:
- _) H( P; \9 c. u& @. }The transformer shall comply with the relevant requirements of IEC 61558-2-17 for safety relating
5 P/ y7 Y. A' ~- `( atransformers.
/ q- x# x7 q& o( m7 N! SThe 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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5 g1 n/ w1 I* F