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|
|  DSH 587
7 \1 \2 F/ h' F; x
+ S; b7 p, e6 Z. F | Transformer intened to supply power to a saftey extra low voltage circuit (SELV)5 G- E7 I7 p) {% G& i1 ?
| 24.1. D& W) W$ @! f+ A
| 60730-1(ed.3);am1 S1 g5 j5 w, L3 q- _
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9 T. U" G0 K0 e/ B" P, c
Question:3 o. \ y' o8 H+ E7 B% x4 ]. [
Sub-clause 24.1 prescribes that “Transformers intended to supply power to a safety extra-low voltage6 \! H$ T% I5 `, m! w6 i
circuit (SELV) shall be of the safety isolating type and shall comply with the relevant requirements of$ K- S; w, L4 r5 F, }% [
IEC 61558-2-6.”.; U: a" k2 M: F) @- s- C0 y, N w
This prescription does not allow the use of other types of transformers not covered by IEC 61558-2-6.
) B* X- T6 N ]' uIn case of testing of an electronic control with an integrated switch mode power supply (SMPS)
. T4 h6 J5 o9 O8 ?& tintended to supply power to a safety extra low voltage circuit (SELV), what requirements shall be5 v8 }/ A0 A# ~9 a. f$ U. O$ }
applied?
, ]+ J( h1 r2 D- p0 F7 x0 VDecision:3 B& c) M) w7 @5 }( T+ n7 P
The transformer shall comply with the relevant requirements of IEC 61558-2-17 for safety relating
0 F, K! q& [; ]! K9 }2 p9 Stransformers.$ z: q/ A1 _4 F8 j' F5 z" i; L
The entire switch mode power supply circuit (with the exception of the transformer) shall fulfil the8 E1 |1 k' Q. k4 a3 W e0 s
requirements of IEC 60730-1 and relevant Annex H.' B5 [ g Q1 x$ X# u- n" M3 M0 l
) F1 n% l7 O/ Z
$ Q v0 ^& a+ I6 _* H; I
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发表于 2012-9-4 14:10
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