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 7 u4 I, Y& r- o' D

Heat and fire protection # B2 Q& f, s0 z. C

3.1.9.1, 3.1.11, 15.3, 15.5, 27.3

61558-1(ed.1);am1 ( V7 \' ~/ Q( K# M7 k

0 q& \! G' A) l8 QStandard: IEC 61558-1/1997
6 Z; i  y4 C  _% A, S: w3 t% g) XA1/1998
$ o# T6 s' t$ w/ i- H, X% ^Sub clause: 3.1.9.1
- d  ?1 g4 I! V1 d  x: B2 c5 ]0 J3.1.11
15.3 – 15.5 – 27.3
Sheet N°: 589/06
& g) f% v  s+ J' ~$ A5 Z: o6 F% QPage: 1 (1)
Subject: Heat and fire protection
* y" z3 k1 g3 Z, b* ZKey words:
- Non-inherently short
circuit
& ^; r: P: v) f- Proof transformer
- Fail-safe transform.
# k' s0 s# K0 y, jMeeting:
0 @  _" g2 k" m. o- H7 LDecision confirmed
+ q4 r8 u7 h) ~6 n$ Yat 44th CTL meeting
Question: Can a small built-in transformer with integrated thermal cut-out (not
replaceable) 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.
Decision: Yes, such transformers can be considered as fail-safe transformers if a thermal
link is used in the input circuit. It doesn’t matter whether the input circuit is
1 H/ B# q2 R) u% s* j( Rinterrupted by the transformer itself or by a built-in thermal link that is not
replaceable.



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