DSH 1048

chinatown

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
The first sentence of clause 3.4.3.1 of IEC 60384-14 states: ”Capacitors of each technology, rated
# H- ?; V+ j# h6 W) i4 {voltage, 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
8 f  L4 h( _* `perform one type test only by applying for each individual test the highest test severity?
) @/ j( x1 ~$ A% ?) r" v; Q6 rTo qualify a dual-class X/Y capacitor, testing laboratories may have different interpretations of this
9 Q: _- U" U. z5 V& psentence.
& o6 r0 w' F# u* w5 hInterpretation a): Some testing laboratories test the same capacitor series once for X1 and once for
; J' C: O8 G3 \+ g. v' BY2 at the same time in separate type tests.
- T2 H# ?" I1 u: [Interpretation b): Other testing laboratories follow the opinion that the safety of the capacitors is also
assured 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,
" h, R0 e: e: ^( [% ias 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
1 R( S3 t1 l% N3 l0 Bhighest test severity for each test.
* C$ P+ `) [. C3 b5 _* x6 nDecision
5 x0 c+ o- r+ nWhen 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.

1 c$ S$ y5 [2 s/ u( T% y

chinatown

DSH 1048附件