Heat Shrink Bus-bar Insulation Tubing
product detail
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％ |