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

小米

广东安规检测
有限公司提供：

小型摆管淋雨试验机

IPX5X6X7喷水试验机

1000L恒温恒湿箱

各种试验指现货

可程式恒温恒湿试验箱

水平垂直燃烧机

自动卷线器试验机

耐划痕试验机

各种灯头量规现货

灼热丝试验机现货

GB1002插头量规

IPX1-X7淋雨现货

IEC61347/UL935镇流器热试验箱

灯具防风罩

IK冲击试验机

UL498插头插座量规

VDE0620插头插座量规

稳定性试验台

家电温升测试角

针焰试验机现货

热电偶焊机现货

家电125mm试验指

E12灯头量规

无绳壶无绳电熨斗插拔寿命试验机

IEC60335试验指甲

DSH 587 : S3 a+ p2 e% e; D7 m & I1 N3 [( ^+ y8 U$ p" k, o, j

Transformer intened to supply power to a saftey extra low voltage circuit (SELV) & P2 H/ {/ w9 x' J$ }" `

24.1 # Q: ~7 t6 _0 E. K( s' R: J" \

60730-1(ed.3);am1 ! V8 W; x6 b8 x  e& a

Question:
( w  I0 x8 ?9 t# C8 |Sub-clause 24.1 prescribes that “Transformers intended to supply power to a safety extra-low voltage
# c" i2 F9 t9 {3 a7 t* Fcircuit (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.
In case of testing of an electronic control with an integrated switch mode power supply (SMPS)
- F/ X8 {! M4 T2 t& M5 S' s: yintended to supply power to a safety extra low voltage circuit (SELV), what requirements shall be
* F( d) r1 i, Eapplied?
# @6 H# h- m. G6 N9 y( jDecision:
; \% |5 @$ C2 q- Z: v9 VThe transformer shall comply with the relevant requirements of IEC 61558-2-17 for safety relating
+ T) c# B; E4 X9 o4 S0 e+ B2 Wtransformers.
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.
% I; n& G3 Z  [8 V! b& d+ ~