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) 6 X" ~8 \8 o8 w  j" m. k

24.1

60730-1(ed.3);am1

' P, \& Q' `3 cQuestion:
0 h2 W2 ~  Y7 V  w$ z9 ^0 dSub-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
IEC 61558-2-6.”.
This prescription does not allow the use of other types of transformers not covered by IEC 61558-2-6.
- c9 Z5 i3 [9 _; p$ y: Q% P( X& `In case of testing of an electronic control with an integrated switch mode power supply (SMPS)
/ x& l# B0 L$ U8 |2 b: Cintended to supply power to a safety extra low voltage circuit (SELV), what requirements shall be
; |* \4 k! A/ O2 Xapplied?
Decision:
The transformer shall comply with the relevant requirements of IEC 61558-2-17 for safety relating
8 m+ h6 \+ m5 Z, d4 Ztransformers.
The entire switch mode power supply circuit (with the exception of the transformer) shall fulfil the
requirements of IEC 60730-1 and relevant Annex H.

5 d8 N1 w3 R$ {