DDP
Consists of Electrical Grade Paper printed on single or both sides with diamond dotted pattern with epoxy resin.
Can be applied in one or more layers between the parts to be insulated. Through heating in the drying oven, the thin layer of B-stage resin melts and cures. Through this process the layers are glued together. The pattern of B-stage resin dots ensures there is sufficient space between them for oil impregnation. The space between dots allows free escape of air and moisture during and application of vacuum.
Technical data
| Properties | Unit | Tolarence | LAMIVOLT KRDDP | |||
|---|---|---|---|---|---|---|
| Thickness (Base Paper) | µM | ± 10% | 75 | 127 | 178 | 254 |
| Density | g/cm³ | 0,90 - 1,05 | ||||
| Gramage (Coated) | gr/m² | ± 12% | 84 | 136 | 187 | 263 |
| Thickness of Resin Coating | µM | 10 - 16 | ||||
| Dielectric Strength (Oil) | kV/mm | minimum | 73 | 68 | 64 | 56 |
All values are according to IEC 626.
Dielectric strength values are characterictic values according to ASTM D149.
Oil compatibility tests are performed according to ASTM D 3445.
Areas of Application
- Inter And Final Layer Insulation For Oil Fiiled Type Transformers And Electromechanical Application
- Aluminium and Copper Conductors Insulation In Oil Filled and Dry Type Tranformers
