Natural Insulating Paperboard
Type: 3052 (B.3.1)
Normal Size: 2000 X 4200 mm;
mechanical strength., electrical strength and compressibility. It is suitable for strips, cylinders, spacer,
plates and structural supports of oil-liquid of distribution transformers, reactor and bushing current
transformer.
3.MAIN TECHNICAL CHARACTERISTICS
Type: 3052 (B.3.1)
1.COMPOSITION AND PRESENTATION
Normal Thickness: 0.50; 0.80; 1.0; 1.5; 2.0; 2.5; 3.0 mmNormal Size: 2000 X 4200 mm;
2.PROPERTIES & APPLICATIONS.
This product made from highly purified unbleached sulphate pulp. It has obvious good properties in mechanical strength., electrical strength and compressibility. It is suitable for strips, cylinders, spacer,
plates and structural supports of oil-liquid of distribution transformers, reactor and bushing current
transformer.
3.MAIN TECHNICAL CHARACTERISTICS
| Items | Standard IEC(641-3-1):1992 |
| Thickness Deviation | ≤ 5.0% |
| Density | 1.10 -1.25 g/cm3 |
| Tensile strength MD | ≥105 N/mm2 |
| Tensile Strength CMD | ≥ 80 N/mm2 |
| Shrinkage MD CMD Perpendicular | ≤ 0.5% ≤ 0.7% ≤ 5.0% |
| Elongation MD CMD | ≥ 3.0% ≥ 4.0% |
| Ash Content | ≤ 1.0% |
| PH Value of Aqueous Extract | 6 - 9 |
| Oil Absorption | ≥ 9% |
| Conductivity of Aqueous Extract | ≤ 5 mS/m |
| Electrical Strength in Oil 0.5mm -1.5mm up 1.5mm -3.0mm | ≥ 40KV/mm ≥ 35 KV/mm |
| Moisture Content | ≤ 6 % |