Quality

Quality

The quality assurance system is based on statistical quality control methods. All products are tested in accordance with IEC 410/IEC 414 sampling plan to ensure an acceptable Average Quality Level (AQL) for major and minor defects.
A brief review of defect categories & AQL is presented below:
Classification of defects:
Major defects: These defects lead to a malfunction of the finished wound components. Cosmo lot acceptance criteria permits 0.4 AQL for major defects.
Minor defects: These defects do not have a severe effect on the function of wound component. Often they have a negative effect on the visual appearance of the end product.
Cosmo lot acceptance criteria permit 0.4 AQL for minor defects.

Major and Minor Defects:
EE, EC, EER, ETD CORES
Major defects Minor defects
AL value
Primary dimensions
( Amin, Cmin, Bmin, Dmin, Emax, Fmax)
Bending
Core loss (Pc)
Peak Induction (B^ )
Secondary dimensions
( Amax, Cmax, Dmax, Bmax, Emin, Fmin)
Visual defects (Chips, Cracks etc.)
EI CORES
Major defects Minor defects
AL value
Primary dimensions
( Amin, Cmin, Bmin, Dmin, Emax, Fmax, Gmin)
Bending
Core loss (Pc)
Peak Induction (B^ )
Secondary dimensions
( Amax, Cmax, Dmax, Bmax, Emin, Fmin, Gmax)
Visual defects(Chips,Cracksetc.)
UU CORES
Major defects Minor defects
AL value
Primary dimensions
( Amin, Cmin, Bmin, Dmin, Emax, Fmax, Gmin)
Bending
Core loss (Pc)
Peak Induction (B^ )
Secondary dimensions
( Amax, Cmax, Dmax, Bmax, Emin, Fmin, Gmax)
Visual defects(Chips,Cracksetc.)
TOROIDS
Major defects Minor defects
AL value
Dimensions ( Amin, Bmin,Cmax)
Dielectric strenght (for coated toroids)
Dimensions
( Amin, Bmax, Cmin)

 AQL AND INSPECTION LEVELS FOR MAJOR & MINOR DEFECTS

Defect AQL Inspection Level Sampling Plan
Major 0.4 ILV IEC-414
Minor 0.4 S3 IEC-410

Traceability
A 7 digit batch number written on each label stuck on each Box and allows to get information about:
  • Material Grade used
  • Type of core
  • Granulate/powder batch used
  • Quantity and date of pressing
  • References of machines involved in the process of relevant lot.
Outgoing Inspection
Each lot passes through a final outgoing inspection before entering into the Finished Goods. During this inspection, all results (Dimensions, AL, Power Loss, Peak induction, Mechanical strength etc.) are checked, some samples are controlled and the test report is supplied to the user along with each lot.

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