36 visiting now: 16 China China flag 12 USA USA flag 3 Vietnam Vietnam flag 2 France France flag 1 Russia Russia flag 1 UK UK flag 1 Netherlands Netherlands flag

Highlighted Companies

Instrument Transformer Cores - China

price: contact company for price


Current transformer of power system plays an important role

in providing a current in its secondary winding proportional

to the alternating current flowing in its primary. They are

commonly used in metering and protective relaying in the

power plants and substations where they facilitate the safe

measurement of large currents, often in the presence of high

voltages. The current transformer safely isolates

measurement and control circuitry from the high voltages

typically present on the circuit being measured.

Comparing with the traditional core material, such as

silicon steel and permalloy, Iron based nanocrystalline

alloy takes the advantage of high permeability and low cost,

it is more competitive in the application of precision

current transformer with 0.2, 0.2s, 0.1 accuracy class,

Bushing current transformer for Epoxy resin cast, Gas

insulated or oil-immersed switchgears, LV, MV and HV

switchgear, and other apparatus in electric power

transmission and distribution system.


Comparison of different materials

Property Antainano®cores permalloy cores Si-steel


Saturate induction T 1.25 0.76 2.03

Initial permeability(0.8mA/cm) 40, 000~80, 000 >80, 000

1, 000

Maximum permeability >250, 000 >200, 000

40, 000

Density (g/cm3) 7.2 8.85 7.65

Curie temperature (°C) 570 400 740

Thickness (mm) 0.025~0.035 0.1 0.3

Stacking factor ≥0.75 0.9 0.95

Advantages of nanocrystalline alloy core

• High permeability―lead to minimized current measuring

error in CT

• High saturation Induction ―lead to small size and light

weight compared to Permalloy CT

• Excellent thermal stability―Can work at -55~130°C for

long time

• Low cost:Ideal for substitute of permalloy cores


Core identification

Core design

OD1(mm) H1(mm) e=(OD1-ID1)/2(mm) Guaranteed curve


50≤OD1<100 ≤30 8≤e≤30 NANO-1 B, E

100≤OD1<250 ≥10 15≤e≤60 NANO-1 A, B, C, D, E

10≤e<15 NANO-2 A, B, D, E

250≤OD1<360 ≥10 15≤e<60 NANO-1 A.B.C.D

10≤e<15 NANO-2 A, B, D

360≤OD1<450 ≥10 15≤e<60 NANO-2 A, B

10≤e<15 NANO-3 A, B

450≤OD1≤650 ≥20 20≤e<60 NANO-3 A, B


Code Case materials Fixed materials Case cover materials

Core dimension(mm)

OD1 ID1 H1

A stainless steel crepe paper bakelite

≥100 —— ——

B silica gel ——

C Aluminum crepe paper Aluminum buckle ——

—— ≥10

D bakelite —— —— ≤20

E Aluminum silica gel Epoxy resin

≤250 —— ——

Products specifications

Part No. Core Dimensions Finished Dimensions

od(mm) id(mm) ht(mm) OD(mm) ID(mm) HT(mm)

ON-055037020 55 37 20 60 32 25

ON-115090010 115 90 10 120 85 15

ON-260200035 260 200 35 265 195 41

ON-280205090 280 205 90 285 200 97

ON-350250030 350 250 30 355 245 35

ON-390260025 390 260 25 395 255 30

ON-450360020 450 360 20 455 355 25

ON-485445015 485 445 15 490 440 20

ON540435040 540 435 40 546 429 46

ON-600460065 600 460 65 606 454 71

ON-875720020 875 720 20 883 712 27

ON-1050800030 1050 800 30 1058 792 37

Note : Cores with other specifications can be provided

concerning to customer's demand.

Instrument Transformer Cores

Feel free to contact us with all your questions

Company Contact:

  • Phone: 62443851

  • Address: No.76 Xueyuan Nanlu,Haidian,Beijing 100081,China, beijing, China

  • Email: Email

Published date: November 8, 2012 -

  • Business Description: National Amorphous and Nanocrystalline Alloy Engineering Research Center(NAC), located in Beijing, P.R.China, is No.1 manufacturer of amorphous and nanocrystalline magnetic materials in China. The foundation of NAC was established in 1995 as a division of CISRI. In 1999 NAC was acquired and merged into a new company called AT&M Co. LTD. as Amorphous Products Branch. With an exciting background of Chinese pioneering achievements, patents and know hows.

    NAC develops and produces a series of Antaimo® ribbon & cores and Antainano® ribbon & cores as well as components which are used in a wide spectrum of applications in power electronics and electronic information industry.

    As the leading manufacturer of amorphous materials and products in China, we devote to offer full solution for magnetic components and meet customer' needs.

Related listings

  • Flattened Expanded Metal
    Flattened Expanded Metal
    Metals - Boegger Industrial Limited - China - April 28, 2016 - contact company for price

    Flattened Expanded Metal Serves for Living Field Flattened expanded metal is made by passing standard expanded metal through a cold rolled reducing mill, leaving a flat and smooth surface that is similar to perforated metal. The rolling process makes...

  • Raised Expanded Metal
    Raised Expanded Metal
    Metals - Boegger Industrial Limited - China - April 28, 2016 - contact company for price

    Raised Expanded Metal for Anti- climb Applications Raised expanded metal is also known as standard expanded metal. Raised expanded metal is made by shearing and stretching the metal sheet with a set of die on a press, creating diamond shaped openings...

  • Sintered Mesh Laminate
    Sintered Mesh Laminate
    Metals - Honesty & Faith Hardware Products Co., Ltd. - China - April 20, 2016 - contact company for price

    Sintered mesh laminate belongs to high strength porous material. It is made of stainless steel or other alloys. Single layer or multiple layers of woven wire meshes are permanently bonded together by an unique diffusion- bonded technique. Compared wi...

Safe Trade Tips

  • Ask for business references and check them
  • Use a payment method that offers better protection for all such as Letters of credit and verified professional escrow services. Avoid payments in advance such as money transfers
  • Verify their business via their local Chamber of Commerce
  • Search the internet using their website address, their business name, their phone and fax numbers, and their email addresses to see if you can find any feedback about them.
  • Get to know more about scams to avoid: Internet Crime Complaint Center - International Financial Scams
  • This site is never involved in any transaction, and does not handle payments, shipping, guarantee transactions, provide escrow services, or offer "buyer protection" or "seller certification"