The S13‑M hermetically‑sealed oil‑immersed distribution transformer is manufactured in full compliance with IEC 60076 standards, featuring ultra-low no-load loss and superior energy-saving performance. It is widely applied in global grid projects across Southeast Asia, Africa, the Middle East and Latin America. It adopts a corrugated fully-sealed tank without conservator tank. The fully enclosed structure isolates internal insulating oil from air and moisture, effectively preventing oil deterioration and insulation aging. With zero maintenance design, it operates stably in high-temperature, humid and coastal salt-fog corrosive environments. Equipped with high-grade low-loss silicon steel core and full pure copper windings, it supports 24-hour continuous outdoor operation with ONAN cooling mode. Standard primary voltages cover 10kV / 11kV to fit most global distribution networks, with standard secondary voltage of 0.4kV. The available capacity ranges from 30kVA to 2500kVA for residential, commercial, industrial and public power supply scenarios. We provide full flexible customization to match different national grid standards. Customizable parameters include special voltage grades, customized capacity, 50Hz / 60Hz frequency, vector group, impedance value and off-circuit tap changer. It is applicable for conventional grid upgrading, industrial parks, mining stations and remote power supply projects. Every S13-M transformer passes strict complete factory testing before delivery. Please send your detailed technical requirements for an accurate formal quotation.