Heat Shrink Double Layer Tube
Insultube ‐ Double Layer is manufactured by Heat Shrinkable Insulating material and Heat Shrinkable Semi-Conductive material with special technology for good insulation in its inner layer and good semi-conduction in its outer layer; providing reliable shield protection.
This tubes are made from High Quality Cross-linked Polyolefin material with Co-extrusion Technology.
This tube is used in Power Cable Straight Through Joints for insulating and outer-shielding layer up to 36kV. It can also be used to other places wherever insulation and shielding is required.
Features and Benefits
- Dual wall Conducting / Insulating.
- Excellent Electrical properties.
- Operation Temperature : -40⁰C to 100⁰C
- Minimum Shrink Temperature : 100⁰C.
- Minimum fully Shrink Temperature : 130⁰C
- Standard Color : Black/Red
Diagram
Selection Chart
| Gala Size | D (Min.) | d (Max.) | T (Min.) |
|---|---|---|---|
| GDLT 30/11 | 30 | 11 | 5.0 ± 0.3 |
| GDLT 35/13 | 35 | 13 | 5.0 ± 0.3 |
| GDLT 45/16 | 45 | 16 | 5.0 ± 0.3 |
| GDLT 55/20 | 55 | 20 | 5.0 ± 0.3 |
| GDLT 65/27 | 65 | 27 | 5.0 ± 0.3 |
| GDLT 85/30 | 85 | 30 | 7.5 ± 0.3 |
| GDLT 100/35 | 100 | 35 | 7.0 ± 0.3 |
| GDLT 120/45 | 120 | 45 | 7.0 ± 0.4 |
D,d : Internal Diameter; T : Thickness
Technical Specification
| PROPERTIES | Inner Insulation
Layer Value |
Outer Semi-Cond.
Layer Value |
STANDARD |
|---|---|---|---|
| Physical | |||
| Tensile Strength | 12 Mpa (N/mm²) (min.) | 12 Mpa (N/mm²) (min.) | ASTM D638 |
| Ultimate Elongation | 300% (Min.) | 300% (Min.) | ASTM D638 |
| Longitudinal Change | -10% (Max.) | -10% (Max.) | ASTM D2671 |
| Hardness | 50 ± 3 Shore D | 50 ± 3 Shore D | ASTM D2240 |
| Water absorption | 0.5 % (max.) | 0.5 % (max.) | ASTM D570 |
| Thermal | |||
| Accelerated ageing | (120°C for 500 Hrs) | (120°C for 500 Hrs) | ASTM D2671 |
| Tensile Strength | 10.5 Mpa (N/mm²) (min.) | 10.5 Mpa (N/mm²) (min.) | ASTM D638 |
| Ultimate Elongation | 270 % (min.) | 270 % (min.) | ASTM D638 |
| Low Temperature Flexibility (-40°C for 4 hrs.) | No Cracking | No Cracking | ASTM D2671 |
| Heat Shock (250°C for 30 min.) | No cracking or flowing | No cracking or flowing | ESI 09-11 |
| Shrink Temperature | 135°C | 135°C | IEC 216 |
| Continuous Temperature limit | -40 to +100°C | -40 to +100°C | IEC 216 |
| Electrical | |||
| Dielectric Strength | 20 KV/mm. (min) | N/A | ASTM D149 |
| Volume Resistivity | 1 x 10¹⁴ Ohm.cm (min) | 1 x 10³ Ohm.cm (min) | ASTM D257 |
Certificates
FAQs
1. What is a Screened Separable Connector?
A Screened Separable Connector is a medium-voltage cable accessory used to connect power cables to transformers, switchgear, or other equipment. It is fully screened and separable, allowing safe installation, disconnection, and maintenance.
2. What voltage levels are Screened Separable Connectors used for?
They are commonly used for 3.6 kV to 36 kV medium-voltage applications, depending on the connector design and standards.
3. Where are Screened Separable Connectors typically used?
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