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
8 J( _9 {; l3 cThe first sentence of clause 3.4.3.1 of IEC 60384-14 states: ”Capacitors of each technology, rated
3 a; P6 {4 X2 F$ avoltage, class and sub-class shall be separately qualified”.
9 ]* \4 V7 m" f. ^4 _2 h! jIf it is requested to qualify a dual-class X/Y capacitor (e.g. X1:400 V, Y2:250V), is it permissible to
perform one type test only by applying for each individual test the highest test severity?
* K, [# V/ Y3 b" QTo qualify a dual-class X/Y capacitor, testing laboratories may have different interpretations of this
sentence.
, \7 @; X# G; C' r! N8 lInterpretation a): Some testing laboratories test the same capacitor series once for X1 and once for
Y2 at the same time in separate type tests.
6 f! }8 f* ?. V( b' VInterpretation b): Other testing laboratories follow the opinion that the safety of the capacitors is also
% x6 e* s4 n% |4 h+ K( U3 Bassured if a mixture of highest testing (peak) voltages of both sub-classes is used. This means worst
case testing, covering both sub-classes for certification.
, q# O* i& ]0 W+ z7 v% x: L9 F3 tBoth interpretations may possibly lead to the result of compliance or non-compliance of the capacitor,
/ k& \( B; F$ k  r+ e( gas in a) more samples are tested and in b) a single capacitor is more stressed.
4 j/ o  Z7 I; KFrom the technical point of view, it should be acceptable to perform one type test only by applying the
6 a& y, M, n' g# Ghighest test severity for each test.
7 {" r& H4 m9 a' sDecision
% e1 @. j7 l6 l7 vWhen a range of dual-class capacitors (X/Y) is qualified, it is allowed to perform one type test only, if
2 R9 t  R; L6 p8 G% I2 B& tthe highest severity of the X or Y class is applied in each respective test.
/ k$ k$ p7 M3 J& h$ ^* P* V
7 m+ @6 \+ E; |% O6 Q" {. ?

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DSH 1048附件