The Busbar Sleeve is a reliable insulation solution designed to protect busbars from short circuits, electrical leakage, and flashovers. Made from high-quality cross-linked polyolefin, it offers excellent dielectric strength, tracking resistance, and chemical resistance.
The dual-layer construction includes a flexible outer layer for durability and an adhesive-lined inner layer that forms a tight, waterproof seal when heated. With a shrink temperature starting at 70°C and full recovery at 125°C, it provides a snug, uniform fit. Ideal for use in switchgear, substations, and industrial power distribution networks.
These shrink sleeves are engineered to deliver long-lasting insulation and mechanical protection in demanding electrical environments, making them a smart choice for professionals who prioritize safety and reliability.
| Property | Test method | Standard |
|---|---|---|
| Heat Shock | 160℃, 4h | No Crack |
| Tensile Strength | ASTM-D-638 | ≥8 MPa |
| Elongation at Break | ASTM-D-638 | ≥300 % |
| Tensile Strength Variation After Heat Aging (130℃×168 h) | ASTM-D-5510 | ≤ ±20 % |
| Elongation at Break Variation After Heat Aging (130℃×168 h) | ASTM-D-5510 | ≤ ±20 % |
| Flammability (Oxygen Index) | IEC 4589 | ≥30 % |
| Item | Test method | Standard value 10 kV | Standard value 35 kV |
|---|---|---|---|
| Volume Resistivity | IEC 60093 | ≥1×1014Ω·cm | |
| Dielectric Strength | IEC 60243 | ≥25kV/mm | |
| Power Frequency Voltage | DL/T 1059 | 42kV | 95kV |
| Withstanding Impulse Voltage | DL/T 1059 | 75kV | 185kV |
| As Supplied/mm | After Recovered/mm | Standard Length /mm(±5) | Application /mm | |||
|---|---|---|---|---|---|---|
| ID (Min) | Wall Thickness (±20%) | ID (Max) | Wall Thickness (±20%) | Width of Rectangular Busbar | Diameter of Circular Busbar | |
| 20 | 1 | 10 | 2.4 | 1000 | 20 | 15 |
| 25 | 1 | 12 | 2.4 | 1000 | 25 | 15 |
| 30 | 1.1 | 14 | 2.4 | 1000 | 30 | 20 |
| 40 | 1 | 17 | 2.4 | 1000 | 40 | 30 |
| 50 | 1.1 | 22 | 2.7 | 1000 | 50 | 35 |
| 65 | 1.1 | 28 | 2.7 | 1000 | 64 | 45 |
| 75 | 1.1 | 32 | 2.7 | 1000 | 75 | 50 |
| 85 | 1.1 | 37 | 2.7 | 1000 | 85 | 65 |
| 100 | 1.1 | 43 | 2.7 | 1000 | 100 | 75 |
| 120 | 1.1 | 53 | 2.7 | 1000 | 120 | 85 |
| 140 | 1.1 | 65 | 2.7 | 1000 | 150 | 100 |
| 180 | 1.1 | 75 | 2.7 | 1000 | 180 | 125 |
| 200 | 1.1 | 88 | 2.7 | 1000 | 200 | 150 |
| 220 | 1 | 88 | 2.7 | 1000 | / | / |
| 250 | 1.5 | 107 | 3.6 | 1000 | / | / |
| 290 | 1.3 | 107 | 3.8 | 1000 | / | / |
| 325 | 1.1 | 107 | 3.8 | 1000 | / | / |
| 350 | 1.2 | 159 | 2.7 | 1000 | / | / |
| 400 | 1.2 | 185 | 2.7 | 1000 | / | / |
| 500 | 1.2 | 210 | 3 | 1000 | / | / |
| As Supplied/mm | After Recovered/mm | Standard Length /mm(±5) | Application /mm | |||
|---|---|---|---|---|---|---|
| ID (Min) | Wall Thickness (±20%) | ID (Max) | Wall Thickness (±20%) | Width of Rectangular Busbar | Diameter of Circular Busbar | |
| 20 | 2.4 | 10 | 4.5 | 1000 | 20 | 15 |
| 25 | 2 | 10 | 4.5 | 1000 | 20 | 15 |
| 30 | 2.4 | 14 | 4.5 | 1000 | 30 | 20 |
| 40 | 2.2 | 17 | 4.5 | 1000 | 40 | 30 |
| 50 | 2.2 | 21 | 4.8 | 1000 | 50 | 35 |
| 65 | 2.2 | 27 | 5 | 1000 | 64 | 45 |
| 75 | 2.2 | 31 | 5 | 1000 | 75 | 50 |
| 85 | 2 | 32 | 5 | 1000 | 85 | 55 |
| 100 | 2 | 38 | 5 | 1000 | 100 | 75 |
| 120 | 2.1 | 50 | 5 | 1000 | 120 | 85 |
| 140 | 2.1 | 59 | 5 | 1000 | 150 | 105 |
| 180 | 2.3 | 71 | 5.5 | 1000 | 180 | 125 |
| 200 | 2.2 | 88 | 5 | 1000 | 200 | 140 |
| 220 | 2 | 88 | 5 | 1000 | / | / |
The Busbar Sleeve is a durable insulation solution that protects busbar systems from electrical leakage, flashovers, and environmental stress. Made from cross-linked polyolefin, it offers excellent dielectric strength, tracking resistance, and a watertight seal with its adhesive-lined interior. With a shrink range of 70°C to 125°C, the Busbar Sleeve ensures a snug fit for round, square, or rectangular bars—ideal for switchgear, substations, and industrial power systems.
The material used is cross-linked polyolefin, providing enhanced durability and performance.
Choosing the right busbar sleeve ensures enhanced insulation, safety, and compliance with industry standards. Whether for distribution panels, switchgear, or industrial installations, Axis’s busbar sleeve solutions provide reliable protection against electrical faults and wear. Designed for durability and long-term performance, our high-quality busbar sleeve options give you the confidence to operate safely in demanding environments. Contact us today to discuss your needs and get expert guidance with competitive pricing.
How to Install a Busbar Sleeve
Installing a busbar sleeve is simple but requires proper attention to ensure maximum safety and performance. Follow these steps:
1. Measure & Cut – Select the correct size of busbar sleeve based on the busbar dimensions, then cut it to the required length.
2. Clean the Surface – Remove dust, oil, or moisture from the busbar to ensure proper adhesion and insulation.
3. Position the Sleeve – Slide the sleeve over the busbar, making sure it covers the desired section completely.
4. Apply Heat – Use a hot air gun to shrink the sleeve evenly, starting from one end and moving gradually to the other.
5. Inspect the Fit – After cooling, check that the busbar sleeve has formed a tight, wrinkle-free seal without gaps.
Correct installation guarantees reliable insulation, extended service life, and compliance with safety standards.
The busbar insulating heat shrink tube (busbar sleeve) is a protective sleeve made from crosslinked polyolefin that provides insulation for busbars in switchgear and substations. Its primary purpose is to:
Prevent short circuits and electrical leakage caused by accidental contact or small animals.
Offer mechanical and environmental protection.
Material: Crosslinked polyolefin with excellent dielectric properties.
Temperature Resistance: Shrinks at 70°C and fully recovers at 130°C.
Flame Retardant: Complies with IEC 4589 (oxygen index ≥30%).
Electrical Safety: Withstands power frequency voltage (42kV for 11kV, 95kV for 33kV) and impulse voltage (75kV for 11kV, 185kV for 33kV).
Axis provides sleeves for rectangular and round busbars in two voltage ranges:
11kV Series: Covers busbar widths from 20mm to 500mm.
33kV Series: Covers busbar widths from 20mm to 220mm with thicker walls for higher voltage insulation.
Example: For a 50mm wide rectangular busbar (11kV), use sleeve size 50/22mm (supplied/recovered inner diameter).
Electrical Properties: IEC 60093 (volume resistivity), IEC 60243 (dielectric strength).
Mechanical Properties: ASTM D-638 (tensile strength), IEC 60587 (tracking resistance).
Flame Retardancy: IEC 4589 (oxygen index ≥30%).
Yes, Axis busbar sleeves are designed for both indoor and outdoor use due to their:
UV resistance (for outdoor durability).
Anti-tracking properties (resists electrical erosion).
Moisture sealing (hot-melt adhesive prevents ingress).
Source: Page 36 (Features and Application section).
| Voltage | Busbar Width (mm) | Sleeve Size (Supplied/Recovered) | Wall Thickness |
|---|---|---|---|
| 11kV | 20–500 | 20/10mm to 500/210mm | 1.1–3.0mm |
| 33kV | 20–220 | 20/10mm to 220/88mm | 2.0–5.5mm |
