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
. v. ~: S+ H  UThe first sentence of clause 3.4.3.1 of IEC 60384-14 states: ”Capacitors of each technology, rated
( V+ b: Q; Z& O5 ivoltage, class and sub-class shall be separately qualified”.
If 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?
To qualify a dual-class X/Y capacitor, testing laboratories may have different interpretations of this
; r# R9 D/ V3 y/ v3 Wsentence.
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.
- @2 j( ^: W, M6 c- N" }2 Y% H" gInterpretation b): Other testing laboratories follow the opinion that the safety of the capacitors is also
7 c2 ?9 d- d' l# eassured 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.
% [& T& y7 r" P2 [4 l3 q" eFrom the technical point of view, it should be acceptable to perform one type test only by applying the
9 {0 E5 K/ |- J5 d9 a/ g6 Ehighest test severity for each test.
- U( U+ `( M( G6 c: ^Decision
When a range of dual-class capacitors (X/Y) is qualified, it is allowed to perform one type test only, if
0 C. h% o' ^- \! pthe highest severity of the X or Y class is applied in each respective test.

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DSH 1048附件