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.
Beside the main rule, the following additional statement is given: “The capacitor with
  E6 R$ Q: P. q7 n, [' ~8 bthe 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.
; W/ d: U) H- ~1 [6 }4 SSimilarly, the capacitor with the minimum capacitance per unit area shall also be
; q# J6 n3 l0 Qtested if this ratio is less than that of the minimum capacitance value in the range by
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:
When the above case occurs, each group referred to in § 11 of IEC 61048 or in § 4
7 ]9 n9 `: j' f; s0 {& eof IEC 61049 shall contain as nearly as possible equal numbers of capacitors of the
. O/ O# z' ?. n: `* [highest capacitance and of capacitors with capacitance per unit surface area
! O. N8 n9 F9 F' I& lexceeding that of the maximum capacitance value in the range by 10% or greater.
  _$ |* D) A2 H( ySimilarly, each of those groups, shall contain as nearly as possible equal numbers of
; i1 A! w; Y9 y9 \5 Y/ r) Wcapacitors 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
* U3 f. X# \% w# Jgreater.
3 [( Z+ @0 A1 |; cExample – IEC 61048 - § 11 – self-healing capacitor.
( i1 u' a7 @3 W/ BA 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;
& |  d4 e# C. m- 13 (12) capacitors with the maximum capacitance per unit surface area exceeding that of the
maximum value in the range by 10% or greater;
/ S8 U2 ~* S1 T2 M) G  V' `1 y- 12 (13) capacitors of the lowest capacitance in the range;
; P, \( J' T0 w3 g7 D% V0 H. @- 13 (12) capacitors with capacitance per unit surface area less than that of the minimum
2 Q5 ~7 ]# W8 l) Vcapacitance value in the range by 10% or grater.

. L9 N& V8 [2 v# O: G* p

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