DSH 589/06 Heat and fire protection

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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 % O& l9 j& C% y4 P% B

Heat and fire protection

3.1.9.1, 3.1.11, 15.3, 15.5, 27.3 . _4 M" r; t; O1 v5 \

61558-1(ed.1);am1 + X5 u4 I% I' n. l1 [* B

Standard: IEC 61558-1/1997
+ ?0 |* Z& c% K1 t" y3 Q2 h! \9 Z9 vA1/1998
) ?" E; l, T# ?! v) f/ T$ o# X5 ySub clause: 3.1.9.1
3.1.11
# L) I1 C8 I' |& t15.3 – 15.5 – 27.3
+ }1 n# |8 L- j3 w( t2 H/ YSheet N°: 589/06
. W" {8 h9 }, c6 t* _2 }( N9 U3 VPage: 1 (1)
* m8 g$ g" p9 VSubject: Heat and fire protection
Key words:
- Non-inherently short
: h( \9 n$ m6 ocircuit
9 g5 ^# l) C- _- a! {! ^- Proof transformer
- Fail-safe transform.
Meeting:
' l! [8 r5 H+ w4 i) f8 k$ `* aDecision confirmed
9 |' T: j. H: Q' tat 44th CTL meeting
/ |/ n6 U8 E% Z  g7 K7 K5 o' }Question: Can a small built-in transformer with integrated thermal cut-out (not
" n* W' S4 ?" G* H2 e  O3 |replaceable) be considered as non-inherently short circuit proof transformer
. Z# N% A: H* t$ r: N(3.1.9.1) and as fail-safe transformer (3.1.11)? If so, can the overload test be
, ]* e. q1 G. V' y4 b! }done according to 15.3 and 15.5? Both tests are to be performed on separate
; m! B* x- B0 ]$ C8 G* r" Umodels.
' G& u5 T/ f0 O5 @Decision: Yes, such transformers can be considered as fail-safe transformers if a thermal
( l" q/ w" L/ o& alink is used in the input circuit. It doesn’t matter whether the input circuit is
interrupted by the transformer itself or by a built-in thermal link that is not
replaceable.




* {' c. ]+ O* |