Nanocrystalline Cores for Current Transformers
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Ferrite materials
We offer our extensive range of ferrite cores in the materials BFM8 and BFM9 as well as in the high-permeability materials BFM2k, BFM3k, BFM6k BFM10k and BFM11k.
Nanocrystalline Cores for Current Transformers
The higher permeability of CT cores results in lower measurement errors and higher measurement accuracy. A silicon steel CT core cannot achieve sufficient measurement accuracy at low ampere-turns or smaller turns. The application of Fe-Ni permalloy cores is limited due to their low magnetization and high cost. Nanocrystalline cores are widely used for precision current transformers in power systems and energy measurement and control due to their high permeability, high magnetization, and lower cost.
Nanocrystalline cores for current transformers are characterized by high permeability and high saturation inductance Bs, which increases the accuracy of the current transformer, reduces the volume and improves linearity. They also offer high temperature stability in the range from -55 °C to 120 °C.
Nanocrystalline Cores for Current Transformers
| Item | Core dimension | Dimension incl. housing | Iron cross section | Magnetic path length | Weight | ||||
|---|---|---|---|---|---|---|---|---|---|
| Part Number: | A | B | C | A | B | C | Afe cm2 | lfe cm | mFe (g) |
| BNK1303 | 12,8 | 9,5 | 3,2 | 14,5 | 8 | 4,7 | 0,04 | 3,5 | 1,1 |
| BNK191406 | 19 | 14 | 6,5 | 22,4 | 12,2 | 8,9 | 0,13 | 5,18 | 5 |
| BNK201405 | 20 | 14 | 5 | 22,5 | 12,6 | 6,5 | 0,12 | 5,34 | 4,7 |
| BNK201410 | 20 | 14 | 10 | 22,7 | 12,1 | 11,7 | 0,25 | 5,34 | 9,5 |
| BNK211610 | 21 | 16 | 10 | 23,6 | 13,6 | 12,3 | 0,21 | 5,81 | 8,6 |
| BNK221706 | 22 | 17 | 6,5 | 23,9 | 15,7 | 8,2 | 0,13 | 6,12 | 5,9 |
| BNK342808 | 34 | 28 | 8 | 36,8 | 26 | 10,4 | 0,2 | 9,73 | 13,8 |
| BNK373206 | 37,5 | 32,5 | 6,5 | 39,6 | 30,1 | 8,6 | 0,13 | 10,99 | 10,5 |
| BNK655510 | 65 | 55 | 10 | 68,8 | 52,3 | 13,5 | 0,41 | 18,84 | 55,6 |