DSH 589/06 Heat and fire protection

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 589/06 + h) q# A( c) I0 u* K3 p1 p& v

Heat and fire protection

3.1.9.1, 3.1.11, 15.3, 15.5, 27.3

61558-1(ed.1);am1

* Q7 B6 f1 e) |4 n1 x( RStandard: IEC 61558-1/1997
- N) Q& Q- @9 CA1/1998
  z) D+ M; X. t, C0 b3 K* n. `0 `9 VSub clause: 3.1.9.1
3.1.11
0 M3 U9 s: F3 W9 X# _( B: b# n15.3 – 15.5 – 27.3
Sheet N°: 589/06
Page: 1 (1)
: \# O7 ^$ ^/ C. Z. [8 I$ m  CSubject: Heat and fire protection
5 K. [( [. D* _# h) _. T4 I5 u1 TKey words:
$ ]! l. \' |! X5 [4 \3 y8 a- Non-inherently short
- w1 _) p1 F& \circuit
6 b1 h3 j: ]3 V6 z" r2 k- Proof transformer
- Fail-safe transform.
% O& y+ R# N; X$ I9 n% f1 _0 xMeeting:
Decision confirmed
1 |* x9 x0 ^* i* ~0 y2 k* E, X( Rat 44th CTL meeting
5 Z6 P; \. }( r6 {* sQuestion: Can a small built-in transformer with integrated thermal cut-out (not
9 P5 I& H% _# [7 u: U/ H# M& freplaceable) be considered as non-inherently short circuit proof transformer
(3.1.9.1) and as fail-safe transformer (3.1.11)? If so, can the overload test be
done according to 15.3 and 15.5? Both tests are to be performed on separate
models.
$ W; G' Z8 D6 E+ Q  f) w( P2 nDecision: Yes, such transformers can be considered as fail-safe transformers if a thermal
- G/ v: l; f- Flink is used in the input circuit. It doesn’t matter whether the input circuit is
1 [3 B4 j  {' G) A* \  W, b2 Ginterrupted by the transformer itself or by a built-in thermal link that is not
" D! Y; M- v! Y. }replaceable.
2 B7 p' `% D$ \$ l
) m$ O1 z" V5 b( p$ k" C


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