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.
" n- }9 b3 m5 D$ mBeside the main rule, the following additional statement is given: “The capacitor with
' c  Y0 g( f: a5 o( |$ Rthe 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.
# [3 [# M, j9 T' q# z7 cSimilarly, 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
, X4 ]# q$ h1 g6 ~0 o( Y" m/ `0 P: y2 {10% or greater”. Nevertheless, the sampling plan is not well specified when the
  q2 g) k2 c- a% s' v) C) g/ j- w, aabove case occurs. How should be composed the final sampling for tests?
Decision: For the time being to apply the following proposed solution:
When the above case occurs, each group referred to in § 11 of IEC 61048 or in § 4
& V" r- s" Q; y' C; s8 f3 U" r  Bof IEC 61049 shall contain as nearly as possible equal numbers of capacitors of the
1 ^6 |9 {, K% [highest capacitance and of capacitors with capacitance per unit surface area
exceeding 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
1 U0 b) ^" h3 p; x% zcapacitors of the lowest capacitance and of capacitors with capacitance per unit
; Y" E! Q# d6 T/ s, Gsurface area less than that of the minimum capacitance value in the range by 10% or
& U6 z9 U! t# m! c0 ?. y3 F4 V" ?greater.
Example – IEC 61048 - § 11 – self-healing capacitor.
A sampling of 50 capacitors is required and according to the above decision they
( Y' B3 Y: P9 `9 S1 n5 B& M; {shall be split as follows:
- 12 (13) capacitors of the highest capacitance in the range;
- q! G6 S3 w; [/ L' |' d3 w- 13 (12) capacitors with the maximum capacitance per unit surface area exceeding that of the
( C0 K5 @1 r- }maximum value in the range by 10% or greater;
& e: g- d" \) m- 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
  U% n) ]) Q0 l+ S+ _5 T. z- @capacitance value in the range by 10% or grater.

' ]5 X% T& Q7 i. h3 h6 l  i

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