Amorphous Alloy Transformer Core

Amorphous alloy has no crystal structure, so it magnetises with far less energy than grain-oriented silicon steel. A core wound from 0.025 mm amorphous ribbon typically cuts no-load loss by around 70% compared with a conventional silicon steel core — which is exactly what Tier-1 efficiency distribution transformers, and every utility tender built around lifecycle cost, are asking for. The trade-off is handling: the ribbon is thin and sensitive to bending, so the core is wound under constant tension and stress-relieved rather than stacked. ZWILLIS supplies both closed rectangular cores and open (split) cores so the coil can be fitted afterwards. Typical uses include utility distribution transformers, PV and wind step-up units, and compact substations where the transformer idles long hours and every watt of no-load loss is billed.