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
+ w9 x. u# @9 d3 d8 Z( v; ]The first sentence of clause 3.4.3.1 of IEC 60384-14 states: ”Capacitors of each technology, rated
voltage, class and sub-class shall be separately qualified”.
1 G6 N$ u" ?8 V. z  y# `6 wIf it is requested to qualify a dual-class X/Y capacitor (e.g. X1:400 V, Y2:250V), is it permissible to
) Z( ~% A8 Z2 l& A: Tperform one type test only by applying for each individual test the highest test severity?
2 n2 M/ X8 T8 ]9 y6 n/ t5 b0 x& a1 `To qualify a dual-class X/Y capacitor, testing laboratories may have different interpretations of this
' i2 m7 X1 {# [/ x) i" }8 Psentence.
Interpretation a): Some testing laboratories test the same capacitor series once for X1 and once for
9 P) X1 h3 J8 wY2 at the same time in separate type tests.
/ _5 v$ a- ]) f6 y7 WInterpretation b): Other testing laboratories follow the opinion that the safety of the capacitors is also
4 |( x0 m/ E& `- A# a4 uassured 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
* a# S/ C, o3 ]! |) Lhighest test severity for each test.
  C" P% V2 U7 ?9 {; _* bDecision
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.
+ k+ o/ g# X# b0 f& Z+ k# u, U, p
! O8 W  F* R1 C  v$ Y5 {% [& P

chinatown

DSH 1048附件