标题: 欧盟276.03.osm.ctl [打印本页] 作者: chinatown 时间: 2017-1-7 22:54 标题: 欧盟276.03.osm.ctl Question: In § 4 of IEC 61048 and in § 3 of IEC 61049 rules for sampling plan are provided. / n1 Z4 g! v/ W) Q) k, j: i% WBeside the main rule, the following additional statement is given: “The capacitor with / a: h" f" w- A( I$ D" N/ ithe maximum capacitance per unit surface area shall also be tested if this ratio' Q) f- o6 A8 P9 ^* [& p# L; L
exceeds that of the maximum capacitance value in the range by 10% or greater. ; X" e/ w) D5 I! t% ySimilarly, the capacitor with the minimum capacitance per unit area shall also be: U F* p: _& k/ V) L7 e. {
tested if this ratio is less than that of the minimum capacitance value in the range by, E! W) ^/ g. b) p
10% or greater”. Nevertheless, the sampling plan is not well specified when the 8 F* s& q; A% }above case occurs. How should be composed the final sampling for tests? 5 Q% F% F/ d+ m$ ^( F6 yDecision: For the time being to apply the following proposed solution: 1 X$ }' ?: I) S0 E" l8 _When the above case occurs, each group referred to in § 11 of IEC 61048 or in § 4% f2 R; \1 j+ q) y; Q9 ?; i* l# g
of IEC 61049 shall contain as nearly as possible equal numbers of capacitors of the 3 U1 J! x" K$ _# xhighest capacitance and of capacitors with capacitance per unit surface area - z. }6 ]( @$ ?6 k' e- g/ sexceeding that of the maximum capacitance value in the range by 10% or greater. $ e' l2 q* Y7 [1 U$ pSimilarly, each of those groups, shall contain as nearly as possible equal numbers of # S p6 Y1 v, v2 o, Ncapacitors of the lowest capacitance and of capacitors with capacitance per unit, q5 p6 Y- q* Z& o
surface area less than that of the minimum capacitance value in the range by 10% or 9 A8 J$ p. N# Q. h- e9 Jgreater. % V4 R+ x& l/ k% f @Example – IEC 61048 - § 11 – self-healing capacitor.$ D7 L! X) Q* f8 J& k
A sampling of 50 capacitors is required and according to the above decision they, b- _1 W; _( m: ]5 D/ K
shall be split as follows:1 S5 v- e5 ~6 V8 W0 d
- 12 (13) capacitors of the highest capacitance in the range; 4 o/ g5 l/ {6 O5 ^+ H6 G7 M. y1 ?- 13 (12) capacitors with the maximum capacitance per unit surface area exceeding that of the i8 y0 n" F( {6 z7 c* l
maximum value in the range by 10% or greater;: u' P7 B1 c7 O! G; @0 Z9 j% h* V
- 12 (13) capacitors of the lowest capacitance in the range; ' o4 L8 G+ T4 Y3 |0 H$ r- 13 (12) capacitors with capacitance per unit surface area less than that of the minimum) `. t' I4 `7 p/ l9 k# j
capacitance value in the range by 10% or grater. 6 R" N8 k, V2 G( R" B. l : X$ ~0 q4 T" S/ \作者: chinatown 时间: 2017-1-7 22:57
欧盟决议276.03.osm.ctl