Product Overview The oil-immersed transformer is a highly reliable electrical device designed for medium-voltage power distribution systems, widely used in industrial, commercial, public utility, and infrastructure projects. This transformer is designed with a capacity of 1000kVA to step down voltage from 10kV to 0.4kV, ensuring stable and efficient power distribution in final electrical systems. The transformer utilizes a high-quality silicon steel core, oxygen-free copper windings, and high-specification insulating oil, providing excellent electrical performance, low power loss, high load capacity, and a long service life. It is suitable for indoor and outdoor substations for distribution systems. With advanced cooling efficiency and high thermal stability, the transformer ensures continuous operation under heavy loads, making it ideal for critical power systems. Key Advantages High efficiency and low power loss Strong overload capacity Excellent heat dissipation performance Long service life exceeding 20 years Stable operation in harsh environments Low noise and low partial discharge Easy maintenance design Suitable for continuous operation under heavy loads Item Specifications Rated Capacity 1000 kVA Primary Voltage 10 kV Secondary Voltage 0.4 kV Frequency 50 Hz / 60 Hz Phase Three-phase Cooling Method ONAN (Natural oil and air cooling) Connection Group Dyn11 (Standard) Insulation Class Class A Winding Material Oxygen-free copper / Aluminum (Optional) Core Material Cold-rolled grain-oriented silicon steel Voltage Regulator No-load / On-load (Optional) Impedance Voltage 4% – 6% Noise Level ≤ 55–65 dB Temperature Rise ≤ 65K Protection Class IP23 (Enclosure option available) Oil Type Mineral insulating oil