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Main Features of Epoxy Winding Tube: 1. Winding technology 2. Superior mechanical strength. 3. Excellent electrical insulation performance. Inner Diameter Scope of Epoxy Winding Tube: (Outer Diameter and Length can be made on request) 20, 23, 24, 26, 30, 32, 36, 38, 40, 43, 47, 48, 50, 54, 55, 56, 57, 60, 63, 64, 65, 66, 68, 70, 73, 76, 77, 80, 83, 90, 92, 100, 102, 103, 110,135, 140, 145, 146, 160, 170, 176, 188, 190, 198, 210, 230, 240, 248, 260, 268, 270, 290, 300, 310, 320, 325, 340, 350, 360, 370, 380, 390, 400, 410, 500, 520, 550 Application reference of Epoxy Winding Tube: Winding Tubes are mostly used in Hollow Insulator & Bushing, surge arrester, high voltage switch, transformers. Technical Specifications No. | Description | Unit | Value | 1 | Density (20±2℃) | g/cm3 | ≥1.9 |
| Water Absorption | % | ≤0.15 | 2 | Bending Strength | MPa | ≥320 | 3 | Compressive Strength | MPa | ≥200 | 4 | Shearing Strength | MPa | ≥25 | 5 | Dielectric Dissipation Factor | - | ≤0.01 | 6 | Dielectric Constant | - | 3~6 | 7 | Volume Resistivity | Normal Condition | Ω·m | ≥1.0 × 1011 | Water Absorbed | ≥1.0 × 109 | 8 | Insulation Resistance Parallel to Layers | Normal Condition | Ω | ≥1.0 × 1011 | Water Absorbed | ≥1.0 × 109 | 9 | Surface Withstand Voltage (spacing 30mm in air for 1 min) | kV | 14 | 10 | Withstand Voltage Vertical to Layers in oil 90±2℃ transformer oil for 5 min | kV | 18/20 | 11 | Withstand Voltage Parallel to Layers in oil 90±2℃ transformer oil for 5 min | Spacing 25mm (kV) | ≥25/50/75 | 12 | Insulation Resistance | Ω·m | ≥5 × 104 | 13 | Power Frequency Withstand Voltage Oil chamber of OLTC to earth In Transformer Oil for 5min, 100mm | kV | ≥85 |
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