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.
5 v) Y9 \6 h/ z3 p" Q' }9 n) P8 w) ABeside 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
" }1 k  T, R. Lexceeds 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
/ C7 o' m, S6 R  {10% 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:
. ]' p: j8 i; i3 P9 r4 R1 j& EWhen the above case occurs, each group referred to in § 11 of IEC 61048 or in § 4
0 V5 ]3 j8 A0 eof 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
, f  G: p4 r' a7 k) Y) U- W3 Mexceeding 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
# |: E; _: m( r, K! m# {capacitors 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
; `) N/ d" m0 k' {7 L0 K: Igreater.
! Z+ D: p6 `- ]7 ?# cExample – IEC 61048 - § 11 – self-healing capacitor.
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;
- 13 (12) capacitors with capacitance per unit surface area less than that of the minimum
$ \, V, i, g$ {& r9 Qcapacitance value in the range by 10% or grater.
, h; S- b  y- {2 T. |$ p+ t* v& M4 ^
( W9 h0 B4 ~! C

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