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

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DSH 587 % z6 [" K; b: @

Transformer intened to supply power to a saftey extra low voltage circuit (SELV) / ^3 Q$ k  A: g

24.1

60730-1(ed.3);am1

' i# K0 j; H5 c# M1 k; w/ h0 t6 HQuestion:
# N, N% T& y4 Z# F. K" zSub-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
7 r1 N3 T6 M2 h4 KIEC 61558-2-6.”.
This prescription does not allow the use of other types of transformers not covered by IEC 61558-2-6.
In case of testing of an electronic control with an integrated switch mode power supply (SMPS)
intended to supply power to a safety extra low voltage circuit (SELV), what requirements shall be
applied?
Decision:
2 ~. l: ^( u: u8 MThe transformer shall comply with the relevant requirements of IEC 61558-2-17 for safety relating
# t* E; a1 D$ S' otransformers.
The entire switch mode power supply circuit (with the exception of the transformer) shall fulfil the
: `8 \9 N. ?0 u  F* Trequirements of IEC 60730-1 and relevant Annex H.
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