The ASTOR 500 kVA 11/0.415 kV transformer is a heavy‐duty liquid‐filled (oil‐immersed) power/distribution transformer made by ASTOR (Turkey). It is designed to step down high voltage (≈ 11 kV) to the low voltage suitable for industrial, commercial or large‐residential applications (≈ 0.415/0.400 kV). The transformer uses high quality materials like copper windings and low‐loss steel cores, with oil cooling to manage thermal load and ensure stable, safe operation under load. Its construction adheres to international standards (IEC etc.), ensuring safety, durability, and efficient performance over its service life.