3640 epoxy tube transformer insulation tube
Table 1, unit (mm)
| Nominal internal | Min Wall-thickness | Bore tolerance | Wall-thickness Wall-thickness |
| 630 | 3.6 | c0.30 | 0.30 |
| 3080 | 4.0 | 0.40 | 0.40 |
| 80150 | 5.0 | 0.50 | 0.50 |
Nominal length and tolerance are shown in Table 2
Table 2, unit (mm)
| Nominal length | Tolerance |
| 900 | 5 |
| 490 | 2 |
| 320 | 1 |
Physical, mechanical, and dielectric properties are shown in Table 3
Table 3, unit (mm)
| Number | Index name | Unit | Index |
| One | Specific gravity, no less than |
| 1.40 |
| Two
| Bending strength, no less than | Kgf/cm2 | 1800 |
| Three | Tensile strength | Kgf/cm2 | 700 |
| Four | Shear strength | Kgf/cm2 | 150 |
| Five | Volume resistivity, no less than | cm |
|
| Normal time |
| 1012 | |
| After soaking |
| 1010 | |
| Six | Parallel layer to layer insulation resistance, no less than |
| |
| Normal time |
| 1010 | |
| After soaking |
| 107 | |
| Seven | Tangent of dielectric loss angle at frequency 50Hz, no higher than |
| 0.030 |
| Eight | Vertical layer to withstand voltage, at 90 + 2 degrees Celsius transformer oil, pressure 5 minutes | Kv |
|
| Wall-thickness1.5mm |
| 12 | |
| Wall-thickness2.0mm |
| 14 | |
| Wall-thickness2.5mm |
| 16 | |
| Wall-thickness3.0mm |
| 18 |