Transformer Core History: From Wrought Iron to Amorphous Alloys

Every transformer core alive today carries over 140 years of trial and error inside it. This article traces that history — from the first laminated wrought-iron core in 1884 to hot-rolled and grain-oriented silicon steel, HiB grades, laser-scribed domains, and today’s amorphous and nanocrystalline alloys — and shows how each material and structural breakthrough cut core losses, and why it still matters when you’re specifying a transformer.

Key Differences Between China and EU Transformer Energy Efficiency Ratings

What are the key differences between China’s GB 20052-2024 and the EU’s 548/2014 transformer efficiency standards? A practical breakdown of voltage classes and loss limits for 10kV oil-immersed and dry-type distribution transformers.