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.
7 l8 S* M' o8 C  i  x+ f: `Beside the main rule, the following additional statement is given: “The capacitor with
+ ^6 n% ]) S) n9 O! L; Mthe maximum capacitance per unit surface area shall also be tested if this ratio
  U1 r* q" ~" A7 V0 nexceeds 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
/ @% ], V  v0 S% m10% 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:
  {) ^1 B& m" ?7 h# A# ^( W9 g) |When 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
7 E, W9 |  D2 \$ ehighest capacitance and of capacitors with capacitance per unit surface area
: n/ b# u) i0 k# A4 i! M3 b* Hexceeding that of the maximum capacitance value in the range by 10% or greater.
Similarly, each of those groups, shall contain as nearly as possible equal numbers of
capacitors of the lowest capacitance and of capacitors with capacitance per unit
! ^: x  b, b! D- W) \  B2 n4 fsurface area less than that of the minimum capacitance value in the range by 10% or
greater.
2 H' h( e, r+ _% RExample – IEC 61048 - § 11 – self-healing capacitor.
# a, V+ G" l; ?A sampling of 50 capacitors is required and according to the above decision they
shall be split as follows:
- 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;
- 12 (13) capacitors of the lowest capacitance in the range;
8 {4 W# g8 c, |* }. A- 13 (12) capacitors with capacitance per unit surface area less than that of the minimum
7 B2 L" x# U3 d% }, ucapacitance value in the range by 10% or grater.
" Y) L( o$ D) Q  x% e8 e; f
8 J1 ~! G4 H  C; M% F$ l) n  r* z

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