Red Yellow Green Heat Shrink Busbar Sleeve Thickened Bus Bar Insulation Sleeve
Bus Bar Heat Shrink Tube Thickened Sleeve
Product Introduction
The continuous busbar protective sleeve is made of environment‑friendly radiation‑crosslinked polyolefin heat‑shrink material by high‑energy electron‑beam irradiation. It features excellent flame retardancy, insulation property and thermal stability, delivering high dielectric strength and superior tracking resistance.
Restricted substances such as PBB, PBDE and heavy metals are excluded. No toxic gas or hazardous substances will be generated during combustion. It is suitable for anti‑corrosion and insulation protection for busbars and electrical equipment, and has obtained certification from Wuhan & Xi’an High‑Voltage Research Institute.
Widely used in power industry, telecommunications, automotive, marine and aerospace manufacturing fields.
Product Features ●Shrinkage ratio: 2:1 ● Initial shrinkage temperature: ≥+70℃ ● Full shrinkage temperature: ≥+120℃ ● Operating temperature: -55℃ ~ +125℃ ● Features: Eco‑friendly, high strength, good elasticity, flame retardant ● Environmental certification: RoHS compliant ● Standard colors: Red, Yellow, Green (Other colors can be customized)
| Property | Requirement | Test Standard |
|---|---|---|
|
Tensile Strength
|
≥8 | GB/T 1040 |
|
Elongation at Break
|
≥300 | GB/T 1040 |
|
Tensile Strength after Aging
|
±20% of pre‑aging value | GB/T 1040,GB/T 7141 |
|
Elongation at Break after Aging
|
±20% of pre‑aging value
|
GB/T 1040,GB/T 7141 |
|
Radial Shrinkage Rate
|
≥50 | ‑ |
|
Axial Shrinkage Rate
|
Φ20～Φ30 ≤5%；Φ40～Φ50 ≤10%； Above Φ60 ≤15% |
‑ |
|
Thermal Shock (160℃×4h)
|
No cracking, no flowing
|
JB 7829 Appendix D |
|
Low‑temperature Resistance (-40℃)
|
No cracking
|
‑ |
| Flame Retardancy‑Oxygen Index | ≥28 | GB/T 2406 |
|
Dielectric Breakdown Strength(kV/mm)
|
≥15 | GB/T 1408.1 |
|
Volume Resistivity(Ω・cm)
|
≥4.3×10¹⁴ | GB/T 1410 |
| Hardness (Shore A) | ≤90 | GB 241 |
Electrical Properties
| Item | 1kV Class | 10kV Class | 20kV Class | 35kV Class |
|---|---|---|---|---|
| Power‑frequency Voltage Test (kV) | 2 | 42 | 65 | 95 |
| Lightning Impulse Voltage Test (kV) | 4 | 75 | 185 | 185 |
This test is applicable only for 10kV busbar. During the test, the sleeve shall be uniformly shrunk onto the busbar surface, and the length of the parallel section shall be ≥1200 mm.
Remarks: Custom sizes and colors are available upon customer request.
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