Magnetec has announced a tape wound core for current transformers capable of handling a DC component (IEC 1036). These tape wound cores are made from Nanocrystalline material to Magnetec’s patented annealing process. These special cores for current transformer are low permeability cores which has advantages such as:
- Small Amplitude error which is required for Electronic Watt-meter applications
- Low Losses
- High linearity
- Low Temperature Drift
- High DC current capability
Standard cores are shown in the table below. However cores can be design to match most specifications.
| Bare Core Size OD x ID x HT (mm) |
µ @ 50Hz, H=1A/M |
le (cm) |
Ae (cm²) |
Current Range (A) |
IDC max (A) |
Coating |
|---|---|---|---|---|---|---|
| 19.1 x 15.2 x 6 | 3,400 | 5.4 | 0.09 | 0.25 – 20 | 40 | Case |
| 22 x 17 x 6 | 2,000 | 6.1 | 0.12 | 0.5 – 60 | 80 | Case |
| 25 x 20.1 x 6 | 1,600 | 7.1 | 0.11 | 1 – 100 | 115 | Case |
| 30 x 24.8 x 6 | 1,600 | 8.6 | 0.12 | 1 – 120 | 140 | Case |
| 35.5 x 30.5 x 6 | 1,900 | 10.4 | 0.12 | 1 – 160 | 180 | Case |