DSH 1048

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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

Question
+ b% S3 X# U0 P' {: o) a  q) k2 eThe first sentence of clause 3.4.3.1 of IEC 60384-14 states: ”Capacitors of each technology, rated
voltage, class and sub-class shall be separately qualified”.
0 s: e: V0 {; e! o4 U: ZIf it is requested to qualify a dual-class X/Y capacitor (e.g. X1:400 V, Y2:250V), is it permissible to
! J5 k. _% \5 Q& R# gperform one type test only by applying for each individual test the highest test severity?
To qualify a dual-class X/Y capacitor, testing laboratories may have different interpretations of this
" D- l; Z8 S& P& Isentence.
2 E, O' j/ C" C- ]& _Interpretation a): Some testing laboratories test the same capacitor series once for X1 and once for
Y2 at the same time in separate type tests.
1 ^0 V6 @$ @' RInterpretation b): Other testing laboratories follow the opinion that the safety of the capacitors is also
! o1 J$ n. a. j# W0 Uassured if a mixture of highest testing (peak) voltages of both sub-classes is used. This means worst
& V+ f1 X9 `+ fcase testing, covering both sub-classes for certification.
+ y, O; g  T/ d+ N( HBoth interpretations may possibly lead to the result of compliance or non-compliance of the capacitor,
0 h2 G4 b  ^; k% i' F* G% F  ]' I4 b, Fas in a) more samples are tested and in b) a single capacitor is more stressed.
" x1 B: _: l) C* M, i% m2 O5 kFrom the technical point of view, it should be acceptable to perform one type test only by applying the
highest test severity for each test.
$ c5 ~1 V& t: t, r' }Decision
! H% _+ H" E5 s0 A" rWhen a range of dual-class capacitors (X/Y) is qualified, it is allowed to perform one type test only, if
the highest severity of the X or Y class is applied in each respective test.
& p/ D! n# @" f3 r0 {
. H4 D! Z! i" T: X+ C

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DSH 1048附件