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 ' V' |- L; E& h* }

Heat and fire protection $ p: L( ?* Y0 x6 Z4 |# s- l

3.1.9.1, 3.1.11, 15.3, 15.5, 27.3 : `! x* T6 n; x- I' w4 t6 d

61558-1(ed.1);am1   T0 M; ^5 l  b* B" g. V8 Y" F

Standard: IEC 61558-1/1997
A1/1998
: x$ M9 }% j) q' _, y: u2 TSub clause: 3.1.9.1
5 S' E( u1 a% I9 K" l8 |3.1.11
' l# M& E+ ~" F7 y3 V2 j5 }6 c15.3 – 15.5 – 27.3
% O' O4 u" o; ^, ]Sheet N°: 589/06
Page: 1 (1)
Subject: Heat and fire protection
9 m& n9 ~, }3 n) v- GKey words:
6 C; l6 h2 Q8 }' J0 w# a- Non-inherently short
/ S; b  ~9 h* q4 L) hcircuit
; Y7 i9 a4 k# ]4 s# L- Proof transformer
( s0 w; M" K) X# j& r) w- Fail-safe transform.
Meeting:
Decision confirmed
at 44th CTL meeting
% U7 }+ V+ q3 n" cQuestion: Can a small built-in transformer with integrated thermal cut-out (not
replaceable) be considered as non-inherently short circuit proof transformer
/ z: g0 x( v. f# L! b. _(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.
0 v6 b- u, \" JDecision: 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
9 S: P$ ?/ l& H& \, yinterrupted by the transformer itself or by a built-in thermal link that is not
replaceable.


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