About Silicon Steel Current Transformer Cores
Oct 16, 2025
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Silicon Steel Current Transformer Core
Due to their high magnetic permeability and low cost, silicon steel CT CORES are suitable for mass-produced current transformer products. The thermal stability of silicon steel CT CORES is excellent, allowing them to withstand high temperatures, and their low coefficient of thermal expansion maintains stability in shape and size even at high temperatures. This makes silicon steel CT CORES suitable for use in many high-temperature environments, such as transformers, motors, and other applications where they are widely employed
silicon steel CT core Feature
Silicon steel current transformer cores have good magnetic permeability, low cost, mature manufacturing processes, and are widely used in current transformers.
Low magnetic saturation induction strength, and they have higher losses at high frequencies.
silicon steel CT core Structure and Material
Material Selection: The mainstream material is grain-oriented silicon steel sheets. Their grain arrangement direction is consistent, and they have higher magnetic permeability and lower iron loss along the rolling direction, making them more suitable for the accuracy requirements of current transformers.
Structural Form: Most are of toroidal or rectangular laminated structure. Among them, the toroidal structure has closed magnetic circuits and low magnetic leakage, which can better improve measurement accuracy and is a common form for medium and high-precision current transformers.
silicon steel CT core Application
Power Metering: Used in current transformers supporting electric energy meters, it accurately converts line currents to ensure the accuracy of electric energy metering.
Power System Protection: In relay protection devices, it transmits current signals quickly and accurately. When faults such as overload or short circuit occur in the line, it assists the protection device to act in a timely manner.
Industrial Measurement and Control: In scenarios such as factory power distribution and motor control, it is used to monitor line currents, provide real-time current data for control systems, and realize precise control of equipment.
specification
Silicon steel core can be customised
| size ( d * D * B )(mm) |
Cross-sectional area(mm²) |
weight(g) |
volt-ampere characteristic(mV) (1A excitation current output) |
Magnetic circuit length(mm) |
| 184*226*60 | 1260 | 7096 | 7.6 | 643.7 |
| 52.5*90.5*64 | 1216 | 2388 | 27.2 | 224.5 |
| 57*89*58 | 928 | 1861 | 17.3 | 229.2 |
| 55*81*68 | 884 | 1651 | 29.3 | 213.5 |
| 59*89*53 | 795 | 1616 | 19.8 | 232.4 |
| 55*87*40 | 640 | 1248 | 19.8 | 222.9 |
| 60*88*40 | 560 | 1139 | 13.8 | 232.4 |
| 41*72*25 | 387.5 | 602 | 14.1 | 177.4 |
| 66*91*30 | 375 | 809 | 9.9 | 246.5 |
| 59*79*30 | 300 | 569 | 7.3 | 216.7 |
| 62*82*30 | 300 | 593 | 8.8 | 226.1 |
| 59*77*30 | 270 | 504 | 7.3 | 213.5 |
| 59*85*12 | 156 | 309 | 3.6 | 226.1 |
| 55*75*15 | 150 | 268 | 3.3 | 204.1 |
| 61*85*12 | 144 | 289 | 2.1 | 229.2 |
| 60*82*11 | 121 | 326 | 3.9 | 222.9 |
| 43*57*15 | 105 | 144 | 4.3 | 157.1 |
| 24*35*10 | 55 | 45 | 3.1 | 92.6 |
GNEE Featured Products
Gnee provides premium iron cores to the world. Our cores can be selected in a wide range of materials, shapes, applications, manufacturing techniques, etc., to meet customers' diverse demands. Explore our wide product range now~
Manufacturing Process
1. Raw Material Sourcing
2. Slitting
3. Punching
4. Laminating
5. Core Forming
6. testing
GNEE EC
Founded in 2008 and located in Anyang in China, Gnee Electric is a high-tech enterprise specializing in researching and manufacturing iron core products.
The company currently occupies over 20,000 square meters and employs more than 200 people, including over 80 professionals. After more than 18 years of development, we have built our own magnetic material production base and independently develope, produce, and sell various kinds of iron cores. The common types include silicon steel cores, motor cores, transformer cores, toroidal iron cores, special-shaped cores, custom cores, and others. Our cores are widely applied in different sectors including transformers, motors, mutual inductors, voltage stabilizers, welding machines, magnetic amplifiers, and instrumentation, providing diverse core solutions to global customers.
30+
Types of Products
18k+
Happy Clients
Why Choose GNEE EC?
GNEE EC was founded in 2008, which is a National High-tech Enterprise & Famous Brand Enterprise in China, developing into a professional manufacturer and supplier of high-quality iron cores.
18+
Over 18 years of success in the iron core industry;
National High-tech Enterprise & Famous Brand Enterprises in China;
200+
Over 200 employees;
The R&D team has more than 80 experienced engineers and the production team has more than 100 skilled staffs;
35+
Annual turnover up to 35 million dollor per year;
Owns many sets of highly automatic winding, annealing, and assembling machines;
1,000+
Over 1000 customers in domestic and overseas markets;
core Products are exported to more than 70 countries in the world;
Gnee Iron Core Factory Overview
Meet Our Sales Manager
"The Core of the Iron Core, the Power of Leadership" - See Our Great Decision-Makers Deeply Engaged in the Magnetic Materials Industry.
Edison Zhang
CEO
Kelly Zhang
General Manager
Alex Cao
Sales Manager
Industries Served
Automobile Industry
New Energy
Transformer Applications
Our Mission
Strive To Create world-class Iron core brand
With 18 Years of industry experience, we focus on the research, development, and manufacturing of high-quality iron cores for electricity, industrial control, new energy, and automotive markets