欧盟276.03.osm.ctl

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IEC61347/UL935镇流器热试验箱

灯具防风罩

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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: In § 4 of IEC 61048 and in § 3 of IEC 61049 rules for sampling plan are provided.
Beside the main rule, the following additional statement is given: “The capacitor with
" i" U- s, r- e2 g- ~the maximum capacitance per unit surface area shall also be tested if this ratio
exceeds that of the maximum capacitance value in the range by 10% or greater.
Similarly, the capacitor with the minimum capacitance per unit area shall also be
tested if this ratio is less than that of the minimum capacitance value in the range by
+ f$ [- r! z5 r3 G, i5 r5 Q10% or greater”. Nevertheless, the sampling plan is not well specified when the
above case occurs. How should be composed the final sampling for tests?
Decision: For the time being to apply the following proposed solution:
: s! J) M* v4 ~) U5 B$ R  ?When the above case occurs, each group referred to in § 11 of IEC 61048 or in § 4
, Y1 N# z' t& s$ t2 x& O3 a, W; sof IEC 61049 shall contain as nearly as possible equal numbers of capacitors of the
$ S, ?- r3 \+ rhighest capacitance and of capacitors with capacitance per unit surface area
) ]6 C) P$ [/ eexceeding that of the maximum capacitance value in the range by 10% or greater.
3 k( C* T. l/ q  W. vSimilarly, each of those groups, shall contain as nearly as possible equal numbers of
9 \$ l- y: {* t! _4 ]' n8 \; Gcapacitors of the lowest capacitance and of capacitors with capacitance per unit
surface area less than that of the minimum capacitance value in the range by 10% or
  S1 j2 q# n8 Q% k% ~' bgreater.
- c( }2 @0 f$ F5 b5 x5 ^) GExample – IEC 61048 - § 11 – self-healing capacitor.
" t6 R* u% D- Q9 LA sampling of 50 capacitors is required and according to the above decision they
0 @. @& z" Z% w1 _; _6 g' N$ k2 sshall be split as follows:
& m- c; l# \0 ~4 e, u7 u- 12 (13) capacitors of the highest capacitance in the range;
- 13 (12) capacitors with the maximum capacitance per unit surface area exceeding that of the
maximum value in the range by 10% or greater;
5 x+ g6 r& l$ Q; H" N  [# p! D- 12 (13) capacitors of the lowest capacitance in the range;
- 13 (12) capacitors with capacitance per unit surface area less than that of the minimum
0 i: R$ f* \5 ~4 acapacitance value in the range by 10% or grater.

, O' o3 u) ?) X9 w+ ^, k) ~5 E

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