BS EN 60384-13:2012 pdf download – Fixed capacitors for use in electronic equipment Part 1 3: Sectional specification — Fixed polypropylene film dielectric metal foil d.c. capacitors
3.2 Structurally similar components
Capacitors considered as being structurally similar are capacitors produced with similar processes and materials, though they may be of different case sizes and values.
3.3 Certified records of released lots
The information required in Clause Q.9 of Annex Q of IEC 60384-1 shall be made available when prescribed in the detail specification and when requested by a purchaser. After the endurance test, the parameters for which information on variables is required are the capacitance change, tan δ and insulation resistance.
3.4 Qualification approval The procedure for qualification approval testing is given in Clause Q.5 of IEC 60384-1 . The schedule to be used for qualification approval testing on the basis of lot-by-lot and periodic tests is given in Clause Q.5 of IEC 60384-1 . The procedure using a fixed sample size schedule is given in 3.4.1 and 3.4.2 below.
3.4.1 Qualification approval on the basis of the fixed sample size procedures The fixed sample size procedure is described in item b) of Q.5.3 of IEC 60384-1 . The sample shall be representative of the range of capacitors for which approval is sought. This may or may not be the complete range covered by the detail specification. The samples shall consist of specimens having the lowest and highest voltages, and, for these voltages, the lowest and highest capacitances. When there are more than four rated voltages, an intermediate voltage shall also be tested.
Thus, for the approval of a range, testing is required of either four or six values (capacitance/voltage combinations). When the range consists of less than four values, the number of specimens to be tested shall be that required for four values. Spare specimens are permitted two or three per value which may be used as replacements for specimens which are nonconforming because of incidents not attributable to the manufacturer. The numbers given in Group 0 assume that all groups are applicable.
If this is not so, the numbers may be reduced accordingly. When additional groups are introduced into the qualification approval test schedule, the number specimens required for Group 0 shall be increased by a same number as that required for the additional group. Table 1 gives the number of samples to be tested in each group or subgroup together with the permissible number of non-conforming items for qualification approval tests.
3.4.2 Tests The complete series of tests specified in Table 3 and Table 4 are required for the approval of capacitors covered by one detail specification. The tests of each group shall be carried out in the order given. The whole sample shall be subjected to the tests of Group 0 and then divided for the other groups. Specimens found non-conforming during the tests of Group 0 shall not be used for the other groups.
“One non-conforming” is counted when a capacitor has not satisfied the whole or a part of the tests of a group. The approval is granted when the number of non-conforming does not exceed the specified number of permissible non-conforming for each group or subgroup and the total number of permissible non-conforming. NOTE Tables 3 and 4 together form the fixed sample size test schedule, for which Table 3 includes the details for the sampling and permissible non-conforming for the different tests or groups of tests, whereas Table 4 together with the detail of test contained in Clause 4 gives a complete summary of test conditions and performance requirements and indicates where, for example for the test method or conditions of test, a choice should be made in the detail specification. The conditions of the test and performance requirements for the fixed sample size test schedule shall be identical to those prescribed in the detail specification for quality conformance inspection.