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ARTICLETechnical article

Is Inefficient CRGO Sabotaging Your Transformer’s No-Load Loss?

  • Chenfan Power

The Hidden Trap of High Building Factors

Relying on outdated silicon steel configurations inflates no-load losses (NLL) by up to 20%, risking non-compliance during IEC 60076 factory tests. The transformer core building factor—often compromised by substandard slitting and stacking—directly drains long-term grid efficiency and profitability.

Critical Data: 0.23mm Hi-B CRGO Dynamics

Deploying 0.23mm Hi-B CRGO steel with 45-degree fully mitred step-lap joints restricts specific core loss to < 0.85 W/kg at 1.7T. Advanced slitting technology limits edge burrs to < 0.02mm, strictly preventing inter-lamination short circuits and drastically minimizing magnetostriction noise.

Field-Tested Stability

Our core engineering recently optimized a distribution network project in Vietnam, cutting total NLL by 15% and ensuring rapid grid integration. Our transformer cores are designed for uniform magnetic flux density and thermal resilience under continuous loads.


What is the strict maximum no-load loss tolerance for your current 2500kVA transformer design?

(Contact for technical specs: frank@chenfanelectricpower.cn | WhatsApp: +8618617775005 | Chenfan Electric)

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