CRGO Core Assembly
The CRGO (Cold Rolled Grain Oriented) Core Assembly is an essential part of a transformer, crafted from high-grade CRGO magnetic silicon steel. These cores are made up of thin CRGO sheets, also known as laminations, designed to optimize the flow of magnetic flux and minimize air gaps between the sheets.
We specialize in the precision assembly of core coils, ensuring optimal performance and reliability. Our expertise lies in crafting transformer components that form the backbone of electrical distribution systems worldwide.
“From the CRGO mother coils to slit coils, cut laminations, and core assemblies — every product passes through advanced quality checks and testing methods such as Epstein Loss Test and No-Load Loss Test to ensure superior efficiency and reliability.”
Technical Team, JAAS Steel Pvt. Ltd.
Benefits of CRGO Core Assembly
- Improved Efficiency: Enhances transformer performance by minimizing energy losses.
- Durability: High-grade materials ensure long-lasting operation and reliability.
- Energy Savings: Optimized design contributes to significant power savings over time.
Key Features of CRGO Core Assembly
- Reduces core losses in transformers and improves efficiency.
- Step-lap design for improved building factor and productivity.
- No-load loss testing and Megger test for quality assurance.
- High accuracy in core diameter and stacking.
- Good insulation quality ensuring long service life.
- Higher flux density and reduced noise level.
- Minimizes maintenance and storage costs.
CRGO coils are the backbone of high-efficiency transformers, ensuring minimal energy loss and superior magnetic performance for reliable power delivery.
Working Process
Our streamlined process ensures reliability and top performance:
Raw Material Inward
Material: CRGO coils are received from approved suppliers.
Checks: Visual inspection, test certificate verification (core loss, thickness, grade).
Storage: Coils stored in clean, dry area to prevent rust or damage.
RM Selection as per requirement.
Slitting Process
Purpose: To slit wide CRGO coils into narrow strips as per lamination width requirement.
Process: Coil loaded on decoiler → passed through slitting cutter for precise width cutting → rewound into slit coils.
Quality Checks: Width accuracy, burr level, edge quality.
Cutting Process
Purpose: To cut slit strips into required lamination lengths and shapes.
Process: Slit coil fed to cut-to-length or step-lap cutting machine. Pieces cut as per design with proper step-lap or butt-lap.
Checks: Length tolerance, burr, step accuracy, orientation marking.
Note: For certain designs, holes, slots, or notches are punched to aid assembly and clamping.
Core Assembly
Purpose: To assemble laminations into complete transformer cores.
Process: Laminations are stacked layer by layer as per core design (step-lap configuration). Tightening bolts or frames applied to ensure proper compression.
Checks: Dimension accuracy, stacking factor, loss test (NLL), insulation intactness.
Testing & Inspection
Core Loss & Magnetic Flux Density measured using Epstein
Dimensional, burr, and insulation checks done.
Results recorded and verified against specifications.
Packing & Dispatch
Laminations packed in moisture-proof wrapping on wooden pallet.
Proper labeling with grade, lot no., dimensions, and weight.
Dispatched to transformer manufacturers or customers.
Purpose
To produce precision CRGO laminations with minimal core loss, accurate dimensions, and consistent quality for use in power and distribution transformer cores.
Applications
CRGO Laminations are used in power and distribution transformers to ensure low core losses and high efficiency. They are also applied in current and potential transformers, inductors, magnetic cores, reactors, and other electrical equipment where superior magnetic performance and durability are essential.
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