220kV 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

End-to-End Manufacturing Support

DINGXIN provides an integrated service covering:

• Electrical and mechanical design;
• Material selection;
• Core processing;
• Coil winding;
• Assembly and insulation;
• Factory testing;
• Export packaging and delivery support.

Keeping these processes under one coordinated manufacturing system helps improve product consistency, quality control and delivery efficiency.

Transformer Manufacturing Experience Since 2006

Established in 2006, DINGXIN has developed into an integrated transformer manufacturer combining research and development, production, testing and quality management.

Our engineering and manufacturing experience enables us to support utility, industrial, infrastructure and renewable-energy projects with different voltage, capacity and operating requirements.

OEM, ODM and Fully Customized Solutions

In addition to standard transformer models, DINGXIN provides:

• OEM manufacturing;
• ODM product development;
• Project-specific electrical design;
• Customized mechanical structures;
• Special voltage and capacity configurations;
• Customized accessories, labels and packaging.

Whether you need one special transformer or a complete project order, our team can develop a solution based on your technical specification.

Strong Engineering Capability

DINGXIN holds multiple invention and utility-model patents. Our engineering team can customize key parameters such as:

• Rated capacity and voltage;
• Impedance and vector group;
• Core and winding materials;
• Tap range;
• Insulation level;
• Cooling method;
• Protection and monitoring;
• Enclosure and installation arrangement.

Strict Quality Control

Quality control is applied throughout material inspection, component processing, winding, assembly, insulation, testing and packaging.

Products undergo the inspections and factory tests required by the approved technical specification before shipment. Test reports and project documentation can be provided according to the contract.

Experience With Major Customers and Projects

DINGXIN has supplied products and services to major enterprises and participated in important infrastructure and energy projects.

Our long-term customers include companies such as CNPC and COSCO Shipping, reflecting our ability to meet demanding technical, quality and delivery requirements.

International Market Experience

DINGXIN transformers have been supplied to customers in:

• The United States;
• Russia;
• Southeast Asia;
• India;
• The Middle East;
• Other international markets.

Our export team supports customers with technical communication, drawings, documentation, packaging and logistics coordination.

International Standards and Certification Support

Products can be engineered according to applicable:

• IEC standards;
• IEEE/ANSI standards;
• CSA requirements;
• EN standards;
• Destination-country regulations;
• Customer specifications.

CE-certified configurations are available where applicable. The exact certification and standards compliance should be confirmed for each product and project.

Professional International Service

Our international sales and engineering teams provide support from initial inquiry through final delivery, including:

1. Specification review;
2. Product selection;
3. Technical clarification;
4. Drawing confirmation;
5. Manufacturing updates;
6. Factory testing;
7. Export documentation;
8. Packaging and shipment;
9. Installation and after-sales guidance.

Build Your Transformer with DINGXIN

DINGXIN is a manufacturer of transformers and substations, providing standard, OEM, ODM and fully customized solutions for global power projects.

Send us your capacity, voltage, application and technical requirements to receive a customized transformer proposal.