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.
3 A; C+ P/ }2 N! oBeside the main rule, the following additional statement is given: “The capacitor with
+ [6 |% t: \( r, wthe maximum capacitance per unit surface area shall also be tested if this ratio
( B* @7 m1 u( I6 Yexceeds 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
% O  j$ l+ p  y3 T) f3 ]tested if this ratio is less than that of the minimum capacitance value in the range by
( g" x2 v6 Z3 U, F9 {10% or greater”. Nevertheless, the sampling plan is not well specified when the
/ U& x1 P  M3 Z+ N; y' H) C: `" i: R2 xabove case occurs. How should be composed the final sampling for tests?
* E; q  L2 i( j6 l' l" C% z5 h+ L6 ^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
( P- e/ B! ?5 [- ?  Kof IEC 61049 shall contain as nearly as possible equal numbers of capacitors of the
0 J7 [+ M0 ?- V# e" E& Khighest capacitance and of capacitors with capacitance per unit surface area
3 w. ]8 G) X4 ~/ x" Xexceeding 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
- V6 r6 R! f7 p( I) C9 }capacitors of the lowest capacitance and of capacitors with capacitance per unit
; \/ j8 h: |: ]5 d4 W2 U. f" wsurface area less than that of the minimum capacitance value in the range by 10% or
greater.
; \5 `9 D) j, Q1 f6 }4 aExample – 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:
- z+ V* H4 T/ B- 12 (13) capacitors of the highest capacitance in the range;
7 q' b/ e% T# A. @7 B. k4 ?- 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;
; W/ u5 B* t6 I) [- 13 (12) capacitors with capacitance per unit surface area less than that of the minimum
capacitance value in the range by 10% or grater.

- @; {* Y% ~$ C

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