WDWT
WDWT
Heat Shrink Semi-conductive/Insulation Dual Layer Tube
The red inner layer is made of insulation material to provide good insulation. The black outer layer is made of semi-conductive material to provide electrical shielding. Suitable for applications in medium voltage cable joints up to 42 kV. Shrink temperature: start at 90℃, and fully recovered at 130℃.
Technical Data
Technical Data-Inner Insulation
| Property | Test Method | Standard Value |
| Tensile Strength | ASTM-D-638 | ≥10MPa |
| Elongation at Break | ASTM-D-638 | ≥350% |
| Tensile Strength Variation After Heat Aging（130℃x168h） | ASTM-D-5510 | ≤±20% |
| Elongation at Break Variation After Heat Aging（130℃x168h） | ASTM-D-5510 | ≤±20% |
| Volume Resistivity | IEC 60093 | ≥1x1014Ω.cm |
| Dielectric Strength | IEC 60243 | ≥20kV/mm |
| Dielectric Constant | IEC 60250 | ≤4 |
| Brittle Temperature | ISO 974 | -40℃ |
| Hardness（Shore A） | ISO 868 | ≥80 |
| Heat Shock | 160℃，4h | No Crack |
| Longitudinal Shrinkage | ASTM-D-2671 | ≤10% |
| Eccentricity | ASTM-D-2671 | ≤30% |
Technical Data-Outer Semi-conductive
| Property | Test Method | Standard Value |
| Tensile Strength | ASTM-D-638 | ≥10MPa |
| Elongation at Break | ASTM-D-638 | ≥350% |
| Tensile Strength Variation After Heat Aging（130℃x168h） | ASTM-D-5510 | ≤±20% |
| Elongation at Break Variation After Heat Aging（130℃x168h） | ASTM-D-5510 | ≤±20% |
| Volume Resistivity | IEC 60093 | ≥1x103Ω.cm |
| Hardness（Shore A） | ISO 868 | ≥80 |
| Heat Shock | 160℃，4h | No Crack |
| Brittle Temperature | ISO 974 | -40℃ |
| Longitudinal Shrinkage | ASTM-D-2671 | ≤10% |
| Eccentricity | ASTM-D-2671 | ≤30% |
Specification Table:
| Spec. | As Supplied/mm | After Recovered/mm |
Standard Length /mm |
||
|
Inner Diameter Min |
Wall Thickness (±20%) |
Inner Diameter Max |
Wall Thickness (±10%) |
||
|
WDWT-30/12 |
30 |
2.8 |
12 |
5.8 |
300-1000 |
|
WDWT-35/13 |
35 |
2.5 |
13 |
5.8 |
300-1000 |
|
WDWT-45/17 |
45 |
2.3 |
17 |
5.8 |
300-1000 |
|
WDWT-55/21 |
55 |
2.2 |
21 |
5.8 |
300-1000 |
|
WDWT-65/26 |
65 |
2.3 |
26 |
5.8 |
300-1000 |
|
WDWT-85/30 |
85 |
2.7 |
30 |
7.2 |
300-1000 |
|
WDWT-100/38 |
100 |
2.9 |
38 |
7.2 |
300-1000 |
| WDWT-120/45 | 120 | 2.9 | 45 | 7.2 | 300-1000 |
