When importing CKD/SKD transformer cores, selecting the correct CRGO (Cold Rolled Grain Oriented) steel thickness is the most critical decision for balancing material cost and no-load loss performance.
At Chenfan Electric, we process thousands of tons of CRGO annually. Here is the engineering reality you need to know before your next project:
1. The 0.23mm Grade (e.g., 23RK075) Thinner laminations mean smaller eddy currents. If your transformers must pass strict Tier-loss standards like EU EcoDesign, DOE 2016, or Southeast Asian utility standards (PEA/MEA/EVN), 0.23mm Hi-B steel is mandatory. It guarantees specific core losses below 0.75 W/kg (at 1.7T/50Hz), ensuring your final product easily passes lab testing.
2. The 0.27mm & 0.30mm Grades (e.g., 27ZH100) These thicknesses are more cost-effective and structurally rigid. They are ideal for standard distribution transformers in markets with less aggressive energy efficiency mandates. However, the trade-off is slightly higher core loss.
3. Precision Cutting Matters More Than Thickness Even the most expensive 0.23mm steel will fail if poorly cut. Our CNC lines guarantee shearing burrs under 0.02mm and a stacking factor of >97%, maximizing the magnetic efficiency of whichever grade you choose.
Don’t guess which grade your project needs. Send us your target no-load loss (Po), and we will engineer the exact core you need.
Contact Frank for a customized CRGO core solution:
- WhatsApp: +8618617775005
- Email: frank@chenfanelectricpower.cn