What are the advantages of DDP?

DDP, also known as diamond dotted paper, is a high-performance insulation material widely used in oil-immersed power transformers, distribution transformers and other electrical equipment. It uses cable paper or electrical insulation paper as the base material, and forms a unique insulation layer by coating special modified epoxy resin on the paper surface in a diamond shape. This design not only significantly improves the insulation performance, but also brings many advantages, making it occupy an important position in the field of electrical insulation.

1. Excellent insulation performance

The core advantage of DDP lies in its excellent insulation performance. Due to the use of special modified epoxy resin, this material has extremely high insulation resistance and breakdown voltage, which can effectively prevent current leakage and short circuit failure. In oil-immersed power transformers, DDP insulation paper is used as inter-turn insulation and inter-layer insulation of coil conductors, which can withstand the impact of high voltage and strong current, ensuring the long-term stable operation of the transformer.

2. Excellent heat resistance and flame retardancy

DDP uses special modified epoxy resin, which can maintain stable electrical and mechanical properties in high temperature environment. Its temperature resistance level can reach F level, and it can maintain good insulation effect even under high temperature conditions. In addition, DDP has extremely excellent flame retardant properties. In extreme cases, when a fire occurs, it can effectively prevent the spread of fire and provide strong protection for the safe operation of electrical equipment.

3. Strong bonding performance

DDP's resin coating will melt and produce adhesion during the drying process, and will solidify as the temperature rises to form a strong bonding strength. This feature can effectively prevent the displacement of each layer of the winding, ensure the long-term mechanical and electrical properties of the insulation structure, and thus extend the service life of the equipment.

4. Effectively avoid corona and partial discharge

The resin coating of DDP is distributed in a dotted pattern, which can effectively prevent the infiltration of oil and the discharge of gas from the insulation material, thereby avoiding the occurrence of corona and partial discharge. This feature significantly improves the reliability of the insulation structure and reduces the risk of equipment failure.

5. Wide range of applications

DDP is not only suitable for turn-to-turn insulation and interlayer insulation of oil-immersed power transformers, but also can significantly improve the life and reliability of transformers. In addition, it is also widely used in epoxy cast transformers, motors, electric motors and other equipment. With the rapid development of the new energy industry, DDP is increasingly used in wind power generation, photovoltaic power generation and other fields, becoming an indispensable key material in new energy equipment.

6. Economical and cost-effective

Although the initial investment cost of DDP may be slightly higher than that of traditional insulation materials, its excellent insulation performance, heat resistance, flame retardancy, and easy processing and customized production characteristics enable it to significantly reduce equipment failure rate and maintenance costs in practical applications. In the long run, DDP is more economical and cost-effective, and can bring greater value to users.

7. Environmental protection and sustainable development

DDP has little impact on the environment during production and use, and meets the requirements of modern industry for environmental protection and sustainable development. Its excellent performance and environmental protection characteristics make it one of the important directions for the development of electrical insulation materials in the future.

DDP plays an important role in the field of electrical insulation due to its excellent insulation performance, heat resistance, flame retardancy, adhesive properties and wide range of applications. With the continuous advancement of science and technology and the growth of market demand, the application prospects of DDP will be broader, providing strong support for the stable operation of electrical equipment and the development of the new energy industry.