Description
Heat Shrink Bus-bar Insulation Tubing
Application
Used in medium voltage substations up to 36kV to reduce electric clearance and increase insulation between bus-bars
Feature
1.Anti-tracking
2.Excellent corrosion resistance
3.UV resistance and weathering resistance
4.Superior electrical and mechanical propertiesperformance.
Performance
| Test | Test Method | Requirement |
| Tensile strength | ASTM D 2671 | ≥11.8MPa |
| Elongation at break | ASTM D 2671 | 700% |
| tensile strength after heat aging | ASTM D 2671/120℃,168小h | ≥10MPa |
| Elongation at break after heat aging | ASTM D 2671/120℃,168h | ≥500％ |
| Longitudinal shrinkage | ASTM D 2671 | 0 to-10％ |
| Electrical strength | IEC 243 | ≥20KV/mm |
| Dielectric constant | IEC 250 | 3.0 Max |
| Volume resistivity | IEC 93 | 1013Ω.cm |
| Flame retardancy (oxygen index) | ASTM 4589 | ≥25 |
| Copper corrosive 120 ° C, 168 hours | ASTM D 2671 | Pass |
| Low temperature brittleness -40 ° C, 4 hours | ASTM D 2671 | No crack |
| Water absorption rate | ISO 62/23℃，14 days | ≤0.5％ |
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