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
& X8 h; O6 a. ^! g$ @The first sentence of clause 3.4.3.1 of IEC 60384-14 states: ”Capacitors of each technology, rated
* }5 W+ S# A% V1 h3 R9 u% ?' U. ?voltage, class and sub-class shall be separately qualified”.
/ }8 |$ m5 Q2 H+ mIf it is requested to qualify a dual-class X/Y capacitor (e.g. X1:400 V, Y2:250V), is it permissible to
8 ?8 Q+ J9 r5 iperform 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
sentence.
! @% e, g8 y8 F' l2 @' g# pInterpretation a): Some testing laboratories test the same capacitor series once for X1 and once for
/ v. ?8 I; O' C9 Y( bY2 at the same time in separate type tests.
Interpretation b): Other testing laboratories follow the opinion that the safety of the capacitors is also
* K) Q+ h' v7 O& v4 N* Aassured 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.
Both interpretations may possibly lead to the result of compliance or non-compliance of the capacitor,
as in a) more samples are tested and in b) a single capacitor is more stressed.
From the technical point of view, it should be acceptable to perform one type test only by applying the
highest test severity for each test.
Decision
When 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.

$ }2 w$ s2 X+ X6 B1 z: V) h7 h& f, j

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DSH 1048附件