220 kV Oil-Immersed Power Transformer

The Dingxin 220 kV oil-immersed power transformer is engineered for high-capacity power transmission and large electrical substations. Its core, copper windings, insulation system, leads, active part, and oil tank are optimized using professional electromagnetic, thermal, mechanical, and insulation analysis.

With rated capacities from 31,500 to 240,000 kVA, the transformer delivers efficient voltage conversion for utility grids, industrial power systems, and renewable energy plants. Its low-loss design, low no-load current, low noise, and reliable insulation performance help improve grid efficiency and reduce operating costs throughout the equipment’s service life.

High pressure transformer, use analysis software and calculation and validation procedures to the transformer core, winding. implement body, lead, fuel tanks, etc, Parts of the optimal design and carry on the omni - directional validation, ensure product performance.

Superior process equipment elaborate material selecting and ecient manufacturing making the transformer has small volume, light weight low loss, low partial discharge, low noise characteristics, the product quality is superior, energy conservation and environmental protection,easy installation and maintenance, reliable operation and effectively reduced products running costs.

• High Transmission Capacity: Designed for large substations and power grids.
• Energy-Efficient Design: Reduced core and winding losses lower operating costs.
• Advanced Engineering: Comprehensive electrical, thermal, and mechanical validation.
• Low Noise and Vibration: Optimized core clamping and tank construction.
• Reliable Insulation: Controlled electric-field distribution supports stable operation.
• Strong Short-Circuit Capability: Reinforced windings withstand electrodynamic forces.
• Long Service Life: High-quality materials and precision manufacturing improve durability.
• Project Customization: Configurations can be engineered for specific grid conditions.

• Rated capacity from 31,500 to 240,000 kVA
• High-voltage ratings of 220 or 230 kV
• Three-phase oil-immersed construction
• High-conductivity copper windings
• YNd11 connection group
• Low no-load and on-load losses
• No-load current as low as 0.42%
• Optimized electromagnetic and thermal design
• High insulation and short-circuit strength
• Designed for high-capacity transmission systems

• National and regional high-voltage transmission networks
• Large utility substations and grid interconnection projects
• Heavy industrial plants, mines, steelworks, and petrochemical facilities
• Large-scale urban infrastructure and transportation systems
• Photovoltaic, wind, and energy-storage power stations as step-up equipment