DDP Diamond Dotted Paper: Differences and applications of diamond grid sizes

DDP has excellent insulation, mechanical and heat resistance properties. It is widely used in electrical equipment su...

DDP has excellent insulation, mechanical and heat resistance properties. It is widely used in electrical equipment such as motors, transformers, and electronic equipment. As an important parameter of this insulation paper, the diamond grid size has an important impact on its performance and application. Understanding the differences and applications of different diamond grid sizes will help to better select and use DDP insulation paper and improve the performance and reliability of electrical equipment.

The influence of diamond size on performance

The influence of diamond size on oil infiltration and gas discharge

The resin coating of DDP is dot-shaped, which ensures the infiltration of oil and the discharge of gas in the insulation material, effectively avoids corona and partial discharge, and ensures the safety and reliability of the insulation structure.

Mechanical and electrical properties

Different sizes of diamonds will affect the mechanical and electrical properties of the material. Smaller diamonds can provide higher bonding strength and better mechanical stability, while larger diamonds may provide better heat dissipation and lower dielectric loss.

Heat dissipation performance

DDP with larger diamonds has relatively large internal gaps, which is conducive to air circulation and heat dissipation, and has better heat dissipation performance. In some high-power, high-heat electrical equipment, such as power transformers, using insulation paper with larger diamonds can help reduce the operating temperature of the equipment and improve the reliability and service life of the equipment.

Applications of DDP with different diamond sizes

Oil-immersed transformers

In oil-immersed transformers, DDP is widely used for inter-turn insulation of coils as well as inter-layer insulation. Smaller diamonds are suitable for occasions requiring high mechanical stability and electrical performance, while larger diamonds are suitable for occasions requiring better heat dissipation performance.

Cable shielding isolation layer

Due to the good anti-corona performance of DDP, it can also be used as a cable shielding isolation layer to prevent corona discharge in cables under high-voltage environments. Smaller diamonds are suitable for high-voltage and high-frequency applications, while larger diamonds are suitable for lower voltage and lower frequency environments.

High-voltage motors and electrical appliances

In high-voltage motors and electrical appliances, DDP  insulation paper can effectively prevent corona discharge and protect the normal operation of the equipment. Smaller diamonds are suitable for occasions requiring high insulation performance, while larger diamonds are suitable for occasions with higher heat dissipation requirements.

The diamond size of DDP insulation paper has a significant impact on its electrical properties, mechanical properties and heat dissipation performance. Different application fields have different performance requirements for insulation paper, so it is necessary to select the appropriate diamond size according to the specific application scenario. In actual applications in the fields of motors, transformers, electronic equipment, etc., the voltage level, mechanical stress, heating conditions and other factors of the equipment should be comprehensively considered. The diamond size of DDP insulation paper should be reasonably selected to improve the performance and reliability of electrical equipment.