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
" F' W, [( Q  P: Q- n( rThe first sentence of clause 3.4.3.1 of IEC 60384-14 states: ”Capacitors of each technology, rated
" k6 y; s- A8 l  B( Bvoltage, class and sub-class shall be separately qualified”.
* y0 L' V+ J7 V5 m/ O* DIf it is requested to qualify a dual-class X/Y capacitor (e.g. X1:400 V, Y2:250V), is it permissible to
' I5 r) I( T( D% v- Operform one type test only by applying for each individual test the highest test severity?
- q2 S8 ]# T5 l6 p, ~) aTo qualify a dual-class X/Y capacitor, testing laboratories may have different interpretations of this
sentence.
) |% `  Q! H0 G4 n1 A3 A. OInterpretation a): Some testing laboratories test the same capacitor series once for X1 and once for
Y2 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
1 H  h% y- @! u+ Ocase testing, covering both sub-classes for certification.
Both interpretations may possibly lead to the result of compliance or non-compliance of the capacitor,
9 `. U' u6 ]  y: Eas in a) more samples are tested and in b) a single capacitor is more stressed.
& {( q! m' a2 V0 O# |0 AFrom the technical point of view, it should be acceptable to perform one type test only by applying the
highest test severity for each test.
1 C; }  w6 U; }! P! J" `0 aDecision
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 r- g# k# J/ ]1 E

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DSH 1048附件