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
The first sentence of clause 3.4.3.1 of IEC 60384-14 states: ”Capacitors of each technology, rated
. W7 R- u$ U. r4 v4 Pvoltage, class and sub-class shall be separately qualified”.
, K6 N! _5 L7 r7 BIf it is requested to qualify a dual-class X/Y capacitor (e.g. X1:400 V, Y2:250V), is it permissible to
3 {: f1 `' y5 jperform 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.
+ z' W3 q! M  ~/ ]5 E. l1 ^Interpretation a): Some testing laboratories test the same capacitor series once for X1 and once for
8 g( R5 b  u& n) }3 ~. ZY2 at the same time in separate type tests.
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
6 l3 M# z$ `; h; Lcase testing, covering both sub-classes for certification.
Both interpretations may possibly lead to the result of compliance or non-compliance of the capacitor,
( O* f8 ~2 F3 Bas in a) more samples are tested and in b) a single capacitor is more stressed.
( j1 E( W5 W% X, sFrom the technical point of view, it should be acceptable to perform one type test only by applying the
highest test severity for each test.
, ?5 P# ~6 A9 JDecision
% `1 L: u8 a/ d- S' DWhen a range of dual-class capacitors (X/Y) is qualified, it is allowed to perform one type test only, if
* |. ~$ k+ y" }. I. x% w6 fthe highest severity of the X or Y class is applied in each respective test.
) Z1 V/ q% Z# r: B1 p' B
% h/ H6 D  V3 J

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DSH 1048附件