Nanocrystalline Current Transformer Core

Introduction

Application

Nanocrystalline current transformers can convert large currents into small currents in a certain proportion, thereby providing current for various instruments and relay protection, and isolating the secondary system from high voltage. This way can protect workers and equipment, can also simplifies and standardizes the manufacture of meters and relays.

Advantages

In order to improve the current transformer precision, has to improve the magnetic permeability of current transformer cores. Compared with silicon steel core, nanocrystalline core has better magnetic permeability. Compared with permalloy core, the cost of nano core is lower. So nano core is the ideal material of current transformer. It is widely used in precision current transformer, zero sequence current transformer, medium and high frequency transformer.

Feature

FEATURE 1

High permeability

FEATURE 2

Magnetic permeability can adjustable between 150~1200

FEATURE 3

High saturation magnetic induction

FEATURE 4

Low corecivity

FEATURE 5

Low core loss

FEATURE 6

ODM available

MATERIAL COMPARISON

Nature	Nanocrystalline iron core	Permalloy core	Silicon steel core
Saturation magnetic induction intensity BS(T)	1.25	0.76	2.03
Initial permeability MI	40,000--80,000	>80,000	1,000
Max.permeability MMAX	>250,000	>200,000	40,000
Density P(G/CM3)	7.2	8.85	7.65
Curit temperature TC(°C)	570	400	740
Belt THICKNESS(MM)	0.025--0.035	0.1	0.3
Lamination factor STACKING FACTOR	≥0.75	0.9	0.95

Representative model

Model	Bare core size	Core size with plastic case	Effective cross-sectional area	Magnetic path length	Inductance output
Model	ID(in)×OD(outside)×HT(high)	ID(in)×OD(outside)×HT(high)	Ae(cm2)	Le(cm)	(mV)
BD-CT951305	Φ9.5×13×5	Φ8.2×14.7×6.5	0.09	3.53	3mA≥0.20
BD-CT961310	Φ9.6×13.2×10	Φ8.5×15.0×12.0	0.14	3.58	3mA≥0.30
BD-CT131810	Φ13×17.8×10	Φ11.5×19.5×6.4	0.12	4.84	3mA≥0.04
BD-CT141965	Φ14×19×6.5	Φ12.0×22.1×9.0	0.12	5.2	≥0.12
BD-CT141908	Φ14×19×8	Φ12.1×22.5×10.1	0.15	5.2	≥0.18
BD-CT142005	Φ14×20×5	Φ12.1×22.5×6.5	0.15	5.34
BD-CT142010	Φ14×20×10	Φ12.1×22.5×12.2	0.23	5.3	≥0.25
BD-CT142108	Φ14×21×8	Φ12.5×23×9.6	0.27	5.5
BD-CT152110	Φ15×21×10	Φ12.9×23.5×12.8	0.23	5.7	≥0.28
BD-CT162110	Φ16×21×10	Φ14.0×24.5×12.5	0.19	5.8	≥0.25
BD-CT162110D	Φ16×21×10D	Φ13.8×24.9×12.2	0.27	5.86
BD-CT162308	Φ16×23×8	Φ14.0×24.9×10.9	0.21	6.1	≥0.20
BD-CT162610	Φ16×26×10	Φ14.0×28.1×13.0	0.38	6.6	≥0.30
BD-CT202507	Φ20×25×6.5	Φ18.2×27.4×9.4	0.12	7.1	≥0.07
BD-CT203008	Φ20×30×8	Φ18.1×32.9×9.95	0.4	7.85
BD-CT202710	Φ20×27×10	Φ18.2×29.2×12.2	0.35	7.38
BD-CT212505	Φ21×25×05	Φ19.2×27.4×6.4	0.1	7.22
BD-CT212965	Φ21×29×6.5	Φ19×31.2×8.4	0.26	7.85
BD-CT212910	Φ21×29×10	Φ19×32.15×13.3	0.4	7.85
BD-CT222805	Φ22×28×5	Φ20×30.2×6.5	0.15	7.85
BD-CT263210	Φ26×32×10	Φ23.7×34.9×12.8	0.3	9.11
BD-CT303765	Φ30×37×65	Φ28×39.2×8.4	0.23	10.52
BD-CT304008	Φ30×40×8	Φ28×42.3×10	0.4	10.99
BD-CT364665	Φ36×46×65	Φ34×46.5×6.5	0.33	12.84
BD-CT535805	Φ53×58×5	Φ51×60.5×6.5	0.13	17.43
BD-CT203210	Φ20×32×10	Φ18×34.2×13.1	0.46	8.2	≥0.22
BD-CT203015	Φ20×30×15	Φ17.8×33.1×17.5	0.57	7.9	≥0.3
BD-CT182815	Φ18×28×15	Φ16.2×29.5×17.0	0.57	7.2	≥0.32
BD-CT142005	Φ14×20×5	Φ12.4×22.7×6.7	0.11	5.3	≥0.1
BD-CT131905	Φ13×18.5×5	Φ11.1×21.1×7.2	0.103	4.9	≥0.1
BD-CT121907	Φ12×19×6.5	Φ10.5×21.1×8.1	0.17	4.8	≥0.25
BD-CT131805	Φ13×17.8×5	Φ11.5×19.6×6.3	0.09	4.8	≥0.1
BD-CT131707	Φ13×17×6.5	Φ11.2×20×9.3	0.097	4.7	≥0.15
BD-CT101305	Φ9.5×13×5	Φ8.2×14.4×6.7	0.065	3.5	≥0.1
BD-CT254010	Φ25×40×10	Φ22.5×42.5×13.0	0.57	10.2	≥0.2
BD-CT254015	Φ25×40×15	Φ21.9×43.2×18.9	0.86	10.2	≥0.3
BD-CT325015	Φ32×50×15	Φ29.0×53.2×18.2	1.03	12.9	≥0.23
BD-CT325020	Φ32×50×20	Φ28.5×53.2×23.5	1.37	12.9	≥0.3
BD-CT406020	Φ40×60×20	Φ37×63×24	1.52	15.7	≥0.2
BD-CT406420	Φ40×64×20	Φ37×67×24	1.82	16.3	≥0.22

Application

Used In Current Transformer

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