Current Transformers & RCDs
Residual current devices and precision current transformers need high initial permeability. Our nanocrystalline toroidal cores reach high permeability with low coercivity, keeping trip thresholds stable over temperature.
Key requirements
- Stable trip threshold
- Low coercivity
- Optional epoxy coating for winding
Recommended cores
NC-METERNanocrystalline Cores for Smart Meters
1K107 Fe-based nanocrystalline cores for built-in current transformers in smart single- and three-phase meters, meeting class 0.1 / 0.05 accuracy.
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NC-CCUTEpoxy-Coated C-Type Cut Nanocrystalline Cores
Half-cut, epoxy-coated C-type cores with ≤ 0.02 mm ground gap — assemble the winding first, no threading needed.
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NC-RCDNanocrystalline Cores for Residual Current Transformers
Closed-ring nanocrystalline cores for AC / A / B type residual current detection, sensitive down to 10 mA leakage.
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NC-WELDERNanocrystalline Cores for Inverter Welders
Cores for 10–50 kHz inverter welder main transformers — a drop-in upgrade over MnZn ferrite with smaller size and lower temperature rise.
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NC-LMZNanocrystalline Cores for LMZ1D–LMZ5D Current Transformers
For State Grid LMZ1D–LMZ5D low-voltage current transformers, compliant with Q/GDW572-2010 and covering class 0.2S / 0.5S.
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NC-HVCTNanocrystalline Cores for MV/HV Current Transformers
Cores for 10 kV / 35 kV current transformers — low remanence, transverse-field annealed, meeting 0.2S gateway metering.
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