Heat-Shrink Busbar Sleeve for EV, ESS and Switchgear
Recovers to a tight fit on busbars with V-0 flame and rated voltage wall. Busbar sleeve shrinks to hug the bar so the insulation follows the cross-section and any corner buildup. We supply it rated to the busbar voltage with a V-0 wall and stable recovered dimensions. Give us the busbar cross-section, voltage, environment and color and we will specify shrink ratio, recovered wall and material. Pic
Recovers to a tight fit on busbars with V-0 flame and rated voltage wall. Busbar sleeve shrinks to hug the bar so the insulation follows the cross-section and any corner buildup. We supply it rated to the busbar voltage with a V-0 wall and stable recovered dimensions. Give us the busbar cross-section, voltage, environment and color and we will specify shrink ratio, recovered wall and material. Pic
Technical specifications
| Type | Polyolefin heat-shrink |
| Voltage | Rated to busbar voltage |
| Flame | UL 94 V-0 |
| Shrink ratio | 2:1 / 3:1 / 4:1 |
| Use | EV / ESS / switchgear busbar |
💾 Datasheets & Test Reports
Download the technical data sheet for this product (PDF).
Information required for quotation
| Base tube | Approved material grade, ID, OD, wall and conditioning as per drawing |
| Datums | Drawing datum scheme and measurement reference |
| Key dimensions | Feature positions, depths, pitch and diameters reviewed before quotation |
| Thread / profile | Standard or custom profile, class, depth, engagement and gage method |
| Other features | Holes, slots, steps, chamfers, cuts and marking |
| Acceptance | Tolerances, sampling, gages, FAI and inspection report |
| Order | Prototype and production quantity, packaging and delivery target |
Applications by industry
- MV/LV switchgear busbar phase insulation
- Panel-board copper/alu busbar phase separation
- Busbar riser and drop-bar insulation in panels
- Transformer terminal busbar covering
- Insulated busbar for motor control centers
- Colour-coded phase shrink sleeving (L1/L2/L3)
Why crosslinked polyolefin for this application
Heavy-wall heat-shrink over busbars gives compact phase isolation, cut-to-the-bolt coverage and a clean finish, replacing tape layups that unravel in service.
Shrink temperature must not anneal the busbar temper; confirm hold against busbar dimensioning for a wrinkle-free, conformable fit.
Standards: UL 224, IEC 60684-3, EN 50343 (busbar use class).
Feature and remaining-wall review
Cut to length before installation; dual-wall adhesive lined requires controlled heat profile for proper flow. Review feature depth, edge distance and remaining wall against critical geometries. Capability is confirmed on your drawing, not from a blanket tolerance.
Inspection and traceability
We state the control plan with you. Batch traceability links raw material lot to finished part.
- First-article inspection (FAI) per your plan
- In-process dimensional checks at every station
- Batch certificate of conformance (COA) supplied on request
- Lot traceability to incoming material certificate
- Dielectric strength and insulation resistance testing available on request
Related components
800V Busbar Heat-Shrink Tubing
Related insulation component from the WELLELE catalog.
ESS Busbar Insulation Sleeve
Related insulation component from the WELLELE catalog.
Double-Wall Heat-Shrink Tube
Related insulation component from the WELLELE catalog.
Common questions
What recovery temperature is needed?
Standard polyolefin recovers at 90–135 °C. PTFE at 300–400 °C. Match the recovery temperature to your assembly heat profile.
Is it RoHS and REACH compliant?
Yes. All standard grades comply with RoHS 2011/65/EU and REACH 1907/2006. Certificates supplied per batch.
Can heat-shrink be printed?
Yes — identification bands, logos and warnings printed before or after shrink. Ask for print area and ink compatibility.
What wire sizes does it fit?
ID from 0.2 mm to 200 mm flat wall, 3 mm to 300 mm dual-wall. Refer to the sizing chart on the product page.
How do I size a busbar sleeve?
ID from 0.2 mm to 200 mm flat wall, 3 mm to 300 mm dual-wall. Refer to the sizing chart on the product page.
Engineering Guides & Selection Notes
Related technical articles that help specify this product.
Get pricing for Heat-Shrink Busbar Sleeve for EV, ESS and Switchgear
Attach the drawing with annual volume. We check the material against your duty and tolerance, verify ID / OD / wall / features, and respond with manufacturability notes and pricing.