Combined Model Vacumm Tubes

TheseTubes are defined by the reinforcement materials paper, cotton fabric and glass fabric - are characterised by very specific material properties. The different varieties within each product category are manufactured for the purpose of obtaining individual combinations of electrical, mechanical, thermal and chemical properties. Physical, mechanical and dielectric Preformens for Epoxy Glass tubes with fabrics 1:1No. IEC 60893-3-2Properties Units EP100 EPGC201 G300-1 EP200 EPGC203 G300-1 EP200 EPGC306 G300-1 EP200 EPGC308 G300-1 Standard Typical Standard Typical Standard Typical Standard Typical 1 Water absorption ( 2mm) mg ≤ 20 12 ≤ 20 15 ≤ 20 15 ≤ 20 15 2 Flexuralstrength, Perpendicular to laminations ( lengthwise) At rom temp. MPa ≥ 340 350 ≥ 340 355 ≥ 340 355 ≥ 340 355 155°C ±2 °C ≥ 170 280 ≥ 170 280 280 3 Impact strength, parallel to laminations, Charpy, notch kJ/m² ≥ 33 55 ≥ 33 42 ≥ 33 42 42 42 4 Electric strength, perpendicular to laminations ( 3mm ) in transformer oil at 90°C ± 2°C kV/mm ≥ 11.8 14 ≥ 11.8 13 ≥ 11.8 13 ≥ 11.8 13 5 Dielectric breakdown voltage, parallel to laminations ( 25 mm ) in transformer oil at 90 °C ±2°C kV ≥ 35 45 ≥ 35 48 ≥ 35 48 ≥ 35 48 6 Dielectric dissipation factor 48 – 62 Hz [ tgδ ] ≤ 0.04 0.025 ≤ 0.04 0.03 ≤ 0.04 0.03 ≤ 0.04 0.03 7 Dielectric constant [εr ] ( Dielectric Permittivity ) ≤ 5.5 4.9 ≤ 5.5 4.9 ≤ 5.5 4.9 ≤ 5.5 4.9 8 Insolator resistivity after immersion GΩ ≤5.0*10² 8*10³ ≤5.0*10² 6*10³ ≤5.0*10² 6*10³ ≤5.0*10² 6*10³ 9 Comparative tracking index ≥ 600 ≥ 600 ≥ 600 ≥ 600 ≥ 600 10 Flammability 11 Temperature Index ≥ 130 130 ≥ 155 200 ≥ 155 200 ≥ 180 200