C-cores can be produced in different types and shapes:

- ​One step (one strip width)
- Cruciform (few steps/different widths)
- Single-phase
- Three-phase
- Circular, oval or rectangular shape

C-cores properties depand on the following factors:

- Geometry of magnetic cores
- The size of air gap between cutted surfaces
- Quality of used CRGO steel
To measure magnetic properties of  C-cores, we are equipped with special instruments. We do 100% tests of all our cores and the measuring process is controlled and recorded.
- Intensity of the magnetic field Heff (A/m)
- Magnetic induction Bmax. (T)
- Core losses P (W)
- Amplitude permeability etc.

What are divided C-cores?

C-cores are produced by winding a strip of  CRGO steel on a rotating mandrel. After having been wound and glued by a epoxy resin, the core is then cut into a few pieces.   

The quality of cutted surfaces is very important for function of final C-core (transformer):

- Common quality of cutted surfaces up to 30 μm TYPE "A".
- Grinding cutted surfaces TYPE "C", done on grinding machine


For the cores wound from the tape thickness of 0.35 (grade N) maximum allowed measuring losses and intensity of magnetic induction Bmax = 1,5T and frequency 50 Hz in four groups according to the following table are guaranteed:
wound magnetic cores


For cores from the belt thickness 0.35 mm (grade N) the highest permissible specific loss values ​of 2.5 W/kg are guaranteed at a magnetic induction Bmax = 1.5 T and a frequency of 50 Hz in accordance with DIN 41309 and IEC 329 standards.
For cores wound from tapes with a thickness of 0.10, the highest value of specific losses of 15 W/kg is guaranteed at magnetic induction Bmax = 1.5 T and frequency 400 Hz. At the request of the customer, we supply certificates of measurement of magnetic properties.