欧盟276.03.osm.ctl

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IEC60335试验指甲

Question: In § 4 of IEC 61048 and in § 3 of IEC 61049 rules for sampling plan are provided.
( \/ v& C. r: E0 \+ oBeside the main rule, the following additional statement is given: “The capacitor with
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
6 r9 c& r( b( M4 M! {9 F, X* b10% 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:
& L1 `& [& f5 k! ], W# Y0 {, pWhen the above case occurs, each group referred to in § 11 of IEC 61048 or in § 4
of IEC 61049 shall contain as nearly as possible equal numbers of capacitors of the
highest capacitance and of capacitors with capacitance per unit surface area
0 p0 @, r, l& ?1 q0 C9 I% uexceeding that of the maximum capacitance value in the range by 10% or greater.
4 g9 v2 k! @+ s7 D9 q4 S5 }Similarly, each of those groups, shall contain as nearly as possible equal numbers of
# M" E4 v$ y3 S  b- ]capacitors of the lowest capacitance and of capacitors with capacitance per unit
4 I6 l  [/ h# ]+ K8 A+ M* wsurface area less than that of the minimum capacitance value in the range by 10% or
- ^# s, t8 L" m# ]  Ygreater.
5 d, W2 E$ M# [Example – IEC 61048 - § 11 – self-healing capacitor.
A sampling of 50 capacitors is required and according to the above decision they
( |4 m8 v" ?" [) |4 i: q: Eshall be split as follows:
- 12 (13) capacitors of the highest capacitance in the range;
0 `: n9 ?: R, w8 U& G& `- 13 (12) capacitors with the maximum capacitance per unit surface area exceeding that of the
maximum value in the range by 10% or greater;
- 12 (13) capacitors of the lowest capacitance in the range;
% V  `! o0 M4 p* N* ~/ z2 d- 13 (12) capacitors with capacitance per unit surface area less than that of the minimum
  X1 Q. G6 W6 ~% Z& v1 [  scapacitance value in the range by 10% or grater.

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欧盟决议276.03.osm.ctl