Rectangular Cores 2019-02-03T19:09:42+00:00

Nanocrystalline Rectangular Cores


Nanocrystalline Rectangular Cores for used in instrument current transformers with accuracy class 0.2, 0.2s, Bushing current transformer for poxy resin cast, Gas insulated or oil-immersed switch-gears, LV, MV and HV switch-gear, power system, relay protection system, power monitoring devices.Flexible Design with Toroidal Shape, Rectangular Shape or Oval Shape.


  •  High initial permeability: Larger insert loss, better inhibiting effect on conducted interference than ferrite.

  • High saturation induction: about 2-3 times higher than ferrite, hardly magnetized to saturate in the cases of current strong interference.

  •  Excellent temperature stability: higher Curie temperature, the changes in alloy performance obviously lower than ferrite under the circumstance of larger temperature fluctuations, showing excellent temperature stability

  • Flexible frequency characteristic: More flexible to obtain the required frequency characteristic through adjustment process.

Physical Properties 

Saturation Magnetization(Bs)1.25TSaturation Magnetostrictive Coefficient(λs)<2×10-6
Curie Temperature(Tc)560℃Density(d)7.3g/cm3
Crystallization Temperature(Tx)510℃Resistivity(ρ)130μΩ-cm
Hardness(Hv)800Continuous Operating Temperature Range-55~130℃

Magnetic Properties

Annealing MethodNon-magnetic Annealing
Initial Permeability>150,000
Maximum Permeability>600,000
Residual Magnetic Flux Density0.6T
Iron Loss P(20kHz,0.5T)<25W/kg
Iron Loss P(100kHz,0.3T)<150W/kg
Iron Loss Change Rate (-55℃~125℃)<15%
"Amorphous Inductor"


  • Bushing current transformer for poxy resin cast

  • Gas insulated or oil-immersed switch-gears

  • LV, MV and HV switch-gear

  • Power system

  • Relay protection system

  • Power monitoring devices

Performance Curves

Core Dimension

A-Core Build;B-Window Width; C-Window Height;D-Strip Width;  E-Core Width;

F-Core Length;Ae-Section Area;Lm-Length of Magnetic Path


Cores with other specifications can be provided concerning to customer demand.

Core Dimension

OD-Outside Diameter ;  ID-Inside Diameter ; HT- Height


The dimensions of OD and HT is defined as Max. ID is defined as Min.
Cores with other specifications can be provided concerning to customer demand.

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