Insulation cover for 24kv overhead transmission line
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Description
Insulation cover for 24kv overhead transmission line. The innovative product design, ease of installation. Use silicon rubber material, anti-aging, corrosion resistance, with good resistance to corona resistance, high temperature performance, especially suitable for the protection of the bare wire. Widely used in substation protection works and railway catenary system, a significant effect in the cross-lines. Insulation cover for 24kv overhead transmission line.
Technical Performance
|
Serial No. |
Properties |
Unit |
Standard Data |
Test Results |
Test Methods |
|
1 |
Electrical Strength Test |
KV/mm |
20 |
22 |
GB/T 1408.1-2006 |
|
2 |
Volume Resistivity |
Ω.cm |
1×1014 |
2×1014 |
GB/T 1410-2006 |
|
3 |
Dielectric Constant |
|
2-3 |
2.3 |
GB/T 1409-2006 |
|
4 |
Shore Hardness |
|
70±5 |
7.1 |
GB/T 531 |
|
5
5.1 5.2 |
Mechanical Properties Before ageing Tensile Strength
Elongation at break After Heat ageing(180°C, 7d)
Tensile Strength Change Elongation Change |
MPa
%
%
|
4.0
200
±30
±30 |
5.5
243
13
-22 |
GB/T 528 |
|
6 |
Low Temperature Elongation(-15°C, 2h) |
% |
20 |
190 |
GB/T 2951.4-1997 |
|
7 |
Low Temperature Flexibility(-50°C, 4h) |
- |
No cracks |
No cracks |
UL224-2004 |
|
8 |
High Temperature Crack Resistance(155°C, 2h) |
- |
No cracks |
No cracks |
GB/T2951.6-1997 |
Product Dimensions
Voltage Ratings/Wall Thickness
|
Voltage(kV) |
10kV |
35kV |
110kV |
220kV |
|
Thickness(mm) |
2.3mm |
2.3-3.0mm |
4.0-6.0mm |
6.0-8.0mm |
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