multi Insulcover is a Medium Voltage Wrap Around Line Cover that provides retrofit insulation for overhead conductors to help prevent electrical outages caused by trees or wildlife coming into the contact with distribution lines. Insulcover is designed to insulate existing bare lines without costly conductor replacement expenditure or additional line hardware. Insulcover may be applied selectively on problem spans when temperatures are above 0 Degree Centigrade.
- TECHNICAL SPECIFICATION FOR SILICON OVERHEAD LINE COVERS. SCOPE: Silicon overhead line covers are suitable for various types of conductors and they are used up to voltage rating of 220 KV
- COLOUR: GREEN/YELLOW/RED.
- RAW MATERIAL: SILICON RUBBER.
- PROCESS: EXTRUSION.
- PROPERTIES: AS PER TABLE BELOW:
| Sl. No. | Property | Test Method | Required Value O | Observed Value |
|---|---|---|---|---|
| 1 | Electrical Strength Test | ASTM D149 | ≥ 20KV/mm | 22KV/mm |
| 2 | Volume resistivity in air at 25°C, Ohms-cm | ASTM D257-2007 | 1x10^14 | 2x10^14 |
| 3 | Hardness Shore-A | ASTM D2240 | 70 ± 5.0 | 71 |
| 4 | Tensile Strength at break, MPa | JIS K6723 | ≥ 4.0 Mpa | 5.5 Mpa |
| 5 | Elongation at break, % | JIS K6723 | ≥ 200% | 243% |
| 6 | High temperature crack resistance (155°/2 Hrs) | VD01 | No change in Color, dimensions or any type of deformation | None of the changes observed |
Chart indicating Conductor Size/ Voltage Rating and Thickness
| A | B | C | D |
|---|---|---|---|
| SL. No. | Voltage Rating | Conductor Size in Sqmm | Size |
| 1 | 11KV (Wall thickness 2.3mm) (Sl. No. 01 to 06) | 50/75mm | φ12.0mm |
| 2 | 80mm | Φ15.6.0mm | |
| 3 | 95/120mm | φ17.0mm | |
| 4 | 150/185mm | φ20.0mm | |
| 5 | 210/240/300mm | φ24.2mm | |
| 6 | 400mm | φ30mm | |
| 7 | 33KV (Wall thickness 2.7mm) (Sl. No. 07 to 15) | 50/75mm | φ12.0mm |
| 8 | 80mm | Φ15.6.0mm | |
| 9 | 95/120mm | φ17.0mm | |
| 10 | 150/185mm | φ20.0mm | |
| 11 | 210/240/300mm | φ24.2mm | |
| 12 | 400mm | φ30.0mm | |
| 13 | 500mm | φ32.0mm | |
| 14 | 630mm | φ35.0mm | |
| 15 | 800mm | φ39.0mm | |
| 16 | 110KV (Wall thickness 4mm) (Sl. No. 16 to 21) | 95/120mm | φ17.0mm |
| 17 | 150/185mm | φ20.0mm | |
| 18 | 210/240/300mm | φ24.2mm | |
| 19 | 400mm | φ30.0mm | |
| 20 | 500mm | φ32.0mm | |
| 21 | 630mm | φ35.0mm | |
| 22 | 220KV (Wall thickness 6mm) (Sl. No. 22 to 26) | 150/185mm | φ20.0mm |
| 23 | 210/240/300mm | φ24.2mm | |
| 24 | 400mm | φ30.0mm | |
| 25 | 500mm | φ32.0mm | |
| 26 | 630mm | φ35.0mm |