It’s not just cutting steel. It’s about manufacturing precision-engineered electrical steel components that dictate the performance, efficiency, and lifespan of power and distribution transformers.
By controlling the entire process from raw mother coil slitting to final core assembly, we ensure optimal magnetic flux distribution, high stacking factors, and strict adherence to global energy efficiency standards.
Prime CRGO Mother Coils
The foundation of high-efficiency transformers begins with the raw material. We source prime-grade Cold Rolled Grain Oriented (CRGO) mother coils from Europe, U.S.A., Japan, Korea and Russia, in various grades (Conventional and HiB).
Material Grades: Available in Conventional (M3, M4, M5) and High-Permeability (Hi-B, MOH, ZDKH) grades.
Thickness Range: Standard processing thicknesses from 0.23mm to 0.35mm.
Surface Insulation: Coated with high-grade Carlite insulation to withstand high operating temperatures and prevent interlaminar eddy currents.
Application: Suitable for both Power & Distribution transformers.
Precision Slit Coils
Our slitting process transforms wide mother coils into exact widths required for your specific transformer designs. We prioritise edge quality, as poor slitting can compromise the steel's grain orientation and insulation.
Tungsten Carbide Slitting: We utilise highly maintained carbide blades to ensure a clean, micro-precision cut.
Dimensional Accuracy: Width tolerances are maintained strictly within 0.05mm to ensure perfect alignment during winding or stacking.
Camber & Edge Wave Control : Tension-controlled recoilers prevent material distortion, ensuring the slit coils feed smoothly into your automatic core-cutting machines.
Cut Laminations
Geometrical accuracy in cut laminations is significant for maintaining an uninterrupted magnetic flux path. We deliver ready-to-stack laminations cut to your exact dimensional blueprints.
Advanced Cutting Geometry: High-speed CNC shearing for 90° and 45° mitred cuts, complete with V-notching and precise hole-punching without deforming the surrounding steel.
Step-Lap Construction: Engineered for vertical or horizontal step-lap joints, which significantly smooths the flux transition at the core corners compared to conventional butt joints.
Stress Management: Cutting processes are optimised to minimise mechanical stress, preserving the grain-oriented magnetic properties of the CRGO steel.
Assembled Cores
For OEMs looking to streamline their assembly lines, we provide plug-and-play built-up cores ready for winding insertion. These are rigidly clamped and tested for guaranteed performance.
Capacity Range: Manufacturing built-up cores for distribution and power transformers from 10 KVA up to 20 MVA ratings.
Optimal Stacking Factor: Expertly stacked to eliminate air gaps, maximising the volume of active magnetic material within the core window.
In-House NLL Testing: Every assembled core undergoes rigorous testing (up to 12.5 MVA capacity) to certify its core loss values before dispatch.
Toroidal Cores
Designed for Current Transformers (CT), Potential Transformers (PT), and specialised electronics, our toroidal cores offer a continuous, air-gap-free magnetic circuit for unparalleled efficiency.
Dimension Range: Custom-wound round cores with Inner Diameters (ID) starting at 25mm up to Outer Diameters (OD) of 500mm.
Inert Atmosphere Annealing: After winding, the cores are stress-relief annealed at up to 800°C in a controlled atmosphere. This crucial step restores the magnetic permeability that is temporarily lost during the mechanical winding process.
Protective Finishes: Available with optional epoxy coating or high-grade varnish to protect against moisture and mechanical damage during copper winding.
Customised Strip lamination
We manufacture tailored strip lamination solutions specifically designed for power conditioning equipment, ensuring consistent magnetic performance in high-demand environments.
Application Specificity: Ideal for Uninterruptible Power Supplies (UPS), Servo Voltage Stabilisers, and specialised control transformers.
Design Flexibility: Precision-punched with 1, 2, or 3 holes, or complex custom slotting based strictly on your engineering drawings.
Insulation Integrity: Punching dies are meticulously maintained to ensure clean holes without flaking or damaging the surface carlite insulation.