250 KVA ECODESIGN TRANSFORMER: HIGHER EFFICIENCY, LOWER LOSSES AND THE ADVANTAGES OF 45° STEP-LAP TECHNOLOGY

Discover how 45° step-lap core technology improves transformer efficiency, reducing energy losses, no-load current and noise compared with traditional butt-joint designs, with measurable operating savings.

Transformer efficiency goes beyond EcoDesign compliance. Core geometry and magnetic circuit design play a crucial role in reducing energy losses and operating costs.

A technical comparison of a 250 kVA EcoDesign transformer with a 45° step-lap core and a traditional butt-joint design highlights significant performance improvements.

The step-lap transformer achieves 3,200 W of winding losses and 394 W of core losses, compared with 3,850 W and 1,150 W respectively for the butt-joint solution.

Its optimised magnetic circuit also reduces no-load current from 7.6% to approximately 0.3%, while minimising noise and vibrations.

At a constant 50% load, operating continuously, the step-lap design can save approximately 8,046 kWh annually, equivalent to €920 at the assumed energy price.

These results demonstrate how advanced transformer design can deliver measurable long-term efficiency and cost benefits.

Read the full article in our website.