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Buckle-type silicone rubber insulating protective sleeve
Category: Product Center
Key words: equipment
Product Description
1. Product introduction
Made of high-quality silicone rubber material, it has excellent electrical, anti-leakage tracking performance, excellent weather resistance, high mechanical properties, hydrophobicity and hydrophobic migration, and excellent high and low temperature resistance. It can be used continuously under the condition of -50 ℃ ~ 150 ℃.
2. Product features
The installation is simple and fast, without any tools, just snap the two ends together to complete the installation.
The snap-in insulation sheath is provided with a snap-in creepage growth page edge, which increases the creepage distance and firmly combines the two ends of the product to further improve the insulation performance.
Snap-on insulated sheathing sleeves apply a waterproof strip in the snap-on groove, which further enhances the pressure resistance and tightness of their products.
3. Application areas
The snap-in insulation sleeve is used in the overhead line of the electrified railway system to improve its insulation performance, prevent the occurrence of short-circuit accidents, and effectively protect the insulation protection of overhead bare wires and transmission busbars.
Overhead lines in railway tunnels, due to the large amount of water vapor generated when the train passes through the tunnel, it is not easy to emit short circuits in the tunnel. In addition, due to the external climate, the above accidents will also occur. The use of snap-in insulation sleeves will avoid this accident.
When the empty grid line passes through the dense branch area, it is very likely that the line short circuit will be caused by the branch falling on the wire. Solution: As long as the installation of snap-in insulation sleeve on this line section, the problem will be solved.
When the overhead line of the power grid passes through fish ponds and other places, it is easy to cause accidental casualties (every year, many anglers are killed by high-voltage electricity all over the country).
Due to the design of the electrical railway or after a period of operation, the insulation performance of the transmission pillar deteriorates, which brings some safety hazards to the railway operation safety. Therefore, it is necessary to add some necessary insulation protection devices at the insulator, and the snap-in insulation sleeve can fully meet its needs.
4. Selection parameters
| Bare conductor size | Silicone rubber sheath diameter (unit: mm) |
| 240 | D28 |
| 120 | D24 |
| 95 | D21 |
| 70 | D18 |
| 50 | D16 |
| 35 | D14 |
5. Technical indicators
| Sex Can | Test conditions | performance index | Test Method | ||
| Mechanical properties | Water absorption,% | ≤0.1 | GB/T1034-1998 | ISO 62 | |
| Hardness, Shore A | 80±5 | GB2411-1980 | ISO 868 | ||
| Tensile strength, MPa | ≥ 12.0 | GB/T1040-1992 | ISO604; | ||
| Elongation at break,% | ≥400 | GB/T1040-1992 | ISO 604 | ||
| low temperature flexibility | -50±2°C/4hr | No crack | UL224-1992 | UL224-1992 | |
| Thermal shock performance | 225±2 ℃/4hr | No crack | UL224-1992 | UL224-1992 | |
| Aging performance | Tensile strength, MPa | 136±2 ℃/168hr | More than 75% retained | GB/T7141-1992 | ISO 604；ASTM D2671 |
| Elongation,% | 136±2 ℃/168hr | More than 75% retained | GB/T1040-1992 | ISO604 ;ASTM D2671 | |
| Heat resistance | Heat resistance temperature, ℃ | ≤ 90 ℃ | GB1035-70 | IEC 216 | |
| electrical properties | Breakdown strength, kV/mm | ≥20 | GB1408-1989 | IEC24 ASTM D 149 | |
| Volume resistivity, Ω.cm | ≥ 1.0 × 1014 | GB1410-1989 | IEC 93 | ||
| dielectric constant | 3.5 | GB1409-1988 | IEC 250， | ||
| Chemical properties | Flammability (OI) | ≥ 28.0 | GB/T2406-1993 | ISO 4589 | |
| Fire Hazard Test | 960±15 ℃ | Qualified | GB5169.1-1997 | ||
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