Products
Products & Capabilities
Nanocrystalline cores and silicon steel cores are our main products. Cores for PT and CT transformers are the line where our price, technology and capacity advantage is strongest, and the nanocrystalline ribbon we make ourselves is exported to customers in many countries. Specification ranges below cover standard production; dimensions outside these ranges are quoted per drawing.
Suitable transformer types
01 / Nanocrystalline Core
Main ProductNanocrystalline Core
Revenue metering for energy meters and 0.2S / 0.5S high accuracy instrument transformers, and a widely used material in today's meter and smart grid applications.
- High initial permeability, μi ≥ 80,000
- Very low core loss with a wide linear current range
- Ratio error and phase error stay minimal even at 1% - 5% of rated current
Typical Specification Range
| Outer diameter | 10 - 1000 mm |
|---|---|
| Inner diameter | 6 - 600 mm |
| Height | 5 - 300 mm |
| Initial permeability | 40,000 - 120,000 |
| Saturation flux density | 1.20 - 1.30 T |
| Coating | Epoxy / PET case / potted |
Suitable transformer types
02 / Silicon Steel Core
Main ProductSilicon Steel Core
Suitable for toroidal (ring) transformers, PT and CT, power transformers, industrial reactors and electromagnets.
- Grain oriented and non-oriented silicon steel options
- High saturation flux density for large current designs
- Laminated, wound and step-lap core constructions
- Low magnetostriction for reduced noise
- Stable supply with in-house slitting and stacking lines
Typical Specification Range
| Strip thickness | 0.05 / 0.08 / 0.10 / 0.15 / 0.18 / 0.20 / 0.23 / 0.27 / 0.30 / 0.35 mm |
|---|---|
| Core type | Toroidal / rectangular / stepped / R-type |
| Saturation flux density | 1.70 - 2.03 T |
| Core loss (1.7T, 50Hz) | 0.70 - 1.40 W/kg |
| Window size | Custom per drawing |
| Surface treatment | Impregnation / epoxy coating / film wrapping |
Suitable transformer types
03 / PT Core
Price · Technology · Capacity AdvantagePT Core
Designed for voltage transformers in metering panels, switchgear and substations, supporting accuracy class 0.2 / 0.5 / 1 designs with low ratio error. Protection windings are built on cores with controlled saturation behaviour, so residual voltage and earth fault signals stay within the relay's operating range during system faults.
- Optimised magnetic path for low ratio and phase error
- Protection class 3P / 6P cores with defined saturation characteristics for earth fault and open-delta residual voltage circuits
- Stable ratio error under short-time overvoltage and fault conditions
- Dual-core and multi-core assemblies that separate metering and protection windings in one PT
- Available in nanocrystalline and silicon steel versions
- Matched to standard PT window and stack dimensions
- Insulation and encapsulation compatible with resin casting
- Sample verification against customer accuracy class target
Typical Specification Range
| Accuracy class support | 0.2 / 0.5 / 1 / 3 / 3P / 6P |
|---|---|
| Material | Nanocrystalline / Si-steel |
| Rated voltage | Up to 36 kV systems |
| Core shape | Toroidal / rectangular / stepped / R-type |
| Core construction | Single core / dual core / multi core |
| Insulation | Epoxy coating / case |
| Lead time (sample) | 7 - 12 days |
Suitable transformer types
04 / CT Core
Price · Technology · Capacity AdvantageCT Core
Covers metering CT, protection CT and combined cores for energy meters, switchgear, busbar systems and new energy converters. Precision metering grades serve revenue-grade energy meters, power quality analyzers and smart power management systems, where stable ratio error at low load current and long-term drift control determine billing accuracy and monitoring reliability.
- Precision metering cores for class 0.2S / 0.5S revenue-grade energy meters and power quality monitoring
- Stable ratio and phase error at 1% - 120% rated current for smart power management and AMI systems
- Low long-term drift, supporting multi-year metering accuracy without recalibration
- Dual-core and multi-core assemblies that combine metering and protection windings
- Good overcurrent behaviour for protection cores
- Tape wound, cut core and stacked constructions
- Dimensional inspection report per batch
Typical Specification Range
| Accuracy class support | 0.2S / 0.5S / 5P / 10P |
|---|---|
| Core construction | Toroidal / cut core / stacked |
| Outer diameter | 16 - 200 mm |
| Secondary turns window | Custom per drawing |
| Insulation | Epoxy / PET / potted case |
| Lead time (sample) | 7 - 12 days |
Raw Material
Nanocrystalline Ribbon — Made In-House, Exported Worldwide
Ribbon is the largest cost element in a nanocrystalline core. We cast and slit it ourselves, which removes one margin layer from your quotation and keeps thickness tolerance and surface quality under the same batch record as the finished core. Beyond our own core lines, this ribbon is widely exported to core makers and transformer manufacturers in other countries, supplied as coil, spool or slit strip.
Alloy type
Fe-based nanocrystalline
Thickness
18 - 30 μm
Width
14 - 100 mm
Supply form
Coil / spool / slit strip
Saturation flux density
1.20 - 1.30 T
Curie temperature
≈ 570 °C
Customization
Customized Delivery Based on Your Requirement
We build a customized delivery plan around your product specification, application scenario or project requirement: requirement review within 24 hours, a preliminary proposal within 48 hours, first samples within 7 days, joint sample verification with aligned test methods, then mass production and fast delivery.
01
Requirement Review in 24 Hours
Your product specification, application scenario or project requirement is reviewed and confirmed by our engineers within 24 hours.
02
Preliminary Proposal in 48 Hours
Material selection, core shape, magnetic design suggestion and budgetary price issued within 48 hours.
03
First Samples in 7 Days
First-round samples produced within seven days, shipped with dimensional and magnetic test data.
04
Sample Verification & Aligned Test Methods
Samples verified together with your team, and both sides align on test methods and acceptance criteria before the project is finalized.
05
Mass Production & Fast Delivery
Mass production follows the control plan and product specification confirmed at the project stage, backed by extensive experience in sea, air, rail and small parcel international shipping.
Quality Control
What We Measure Before Shipping
Core magnetic property measurement, dimensional measurement, no-load loss testing, and electrical testing of semi-finished products after winding.
Permeability
Initial and maximum permeability measured on ring samples per batch.
Core Loss
No-load loss measured at rated frequency and flux density, with the B-H curve recorded.
Knee Point Voltage
Knee point voltage measured to verify saturation margin for protection cores.
Dimension & Appearance
OD / ID / height, flatness, coating integrity and burr inspection.
Withstand Voltage
Dielectric withstand voltage test on coated and encapsulated cores.
Need a custom core? Request a datasheet or sample.
Send your drawing or specification and our engineers will confirm material, dimensions and lead time.