The Split insulation tube is a cold‑applied wrap around cover that provides retrofit insulation for overhead conductors to help prevent electrical outages caused by incidental contact from tree branches or wildlife. The Split insulation tube cover may be applied selectively on problem spans to avoid costly conductor replacement. Installation is possible on energized lines utilizing the Split insulation tube tool which attaches directly to the overhead conductor and remains stationary in a single location.
Number, product size and conductor cross section
| Number | Product size | Conductor cross section |
|---|---|---|
| 1 | Ф14 | ≤70mm² |
| 2 | Ф18 | 70mm²~185mm² |
| 3 | Ф31 | 185mm²~400mm² |
| 4 | Ф38 | 400mm²~800mm² |
Property, test method and standard value
| Property | Test Method | Standard Value |
|---|---|---|
| Operating temperature | IEC 216 | -45°C to +105°C |
| Tensile strength | ASTM D2671 | ≥13 MPa |
| Elongation at break | ASTM D2671 | ≥300% |
| Tensile strength after aging | ASTM D2671 / 120°C,168h | ≥11 MPa |
| Elongation at break after aging | ASTM D2671 / 120°C,168h | ≥250% |
| Dielectric strength | IEC 243 | ≥25 kV/mm |
| Volume resistance | ASTM D2303 | ≥1×10¹⁴ Ω·cm |
| Flammability (Oxygen index) | IEC 93 | ≥28 |