Series P10 · Power & Corona Systems
Electrical Insulation Products,
From Busbar Sleeves to Corona Tubes
Busbar sleeves, cold-shrink and corona-resistant silicone tubes — serving 19+ cable accessory manufacturers. Large-diameter extrusion up to 240 mm OD, dual-layer constructions with conductive inner and insulating outer walls, and corona grades stable to +300°C.
Product Overview
Insulation Engineered for Power Duty
Power systems punish insulation: sustained heat, corona attack, mechanical clamping. YUTIAN electrical insulation products are built for that duty — corona-resistant formulations for ozonizer and corona-treatment equipment, and busbar sleeves that insulate without removing the conductor.
Over 531 insulation part numbers produced over the past decade, serving cable accessories, switchgear and power transmission OEMs.
Schematic illustration — dual-layer busbar sleeve construction
Product Range
Insulation Product Configurations
Three product families cover corona duty, busbar insulation and cold-shrink applications. All customizable to drawings.
Corona-Resistant Tubing
- HUDY series, ID 29.5 – 236 mm, wall 3.5 mm
- Max OD up to 240 mm — large-diameter extrusion
- For ozonizer / corona-treatment equipment
Busbar Sleeves
- Ø10×25 mm to Ø29×50 mm typical pairs
- Conductive-inner / insulating-outer dual layer
- Custom size pairs available
Cold-Shrink Products
- Expandable sleeves for cable accessories
- Tool-free installation on site
- Serving 19+ cable accessory manufacturers
Key Features
Why Silicone for Power Insulation
Technical Specifications
Specification Overview
| Parameter | Typical Range |
|---|---|
| Corona Tubing | HUDY series — ID 29.5–236 mm, wall 3.5 mm, max OD 240 mm |
| Busbar Sleeves | ID/OD pairs from Ø10×25 mm to Ø29×50 mm (typical), custom available |
| Temperature | −40°C to +300°C (corona grades); standard −40°C to +200°C |
| Track Record | 531+ part numbers over the past decade |
Schematic illustration — sleeve dimensions and layers
Customization
Sized to Your Conductor
Busbar pairs, corona bores and cold-shrink geometries are all produced to drawing — the large-diameter line makes non-standard sizes routine.
Applications
Where Our Insulation Products Work
Switchgear, Busbar & Cable Accessories
- Busbar insulation sleeves for switchgear assemblies
- Cold-shrink components for cable accessory production
- Power transmission and distribution components
Corona-Treatment & Ozonizer Equipment
- Dielectric tubes for corona-treatment rollers and systems
- Ozonizer equipment tubing under continuous discharge
- Industrial surface-treatment machinery
Manufacturing & Quality
From Compound to Qualified Product
Three coordinated bases — raw material, functional compounds and precision extrusion — under one quality system.
Quality Control at Each Stage
- Incoming material inspection — compound properties verified before production
- Large-diameter concentricity control — wall thickness monitored around the circumference
- Electrical-grade material control — insulation compounds verified before production
- Final inspection & traceability — batch records from compound to shipment
Monthly averages: ≥ 95% self-inspection pass rate, ≥ 99% customer acceptance rate. In-house laboratory covering GC-MS, tensile, burst, thermal aging and UV weathering tests.
Production hall — YUTIAN manufacturing base
Technical FAQ
Questions Engineers Ask First
What is the largest tube you can extrude?
Why a conductive inner layer on a busbar sleeve?
Can you make custom / non-standard profiles? Is tooling required?
Can you cut to length? Do you offer bonding?
What colors are available?
What is the MOQ? Do you sell short lengths?
Are samples free? How fast can you provide them?
Request a Quote
Tell Us Your Operating Conditions
The more complete the input, the faster and more accurate the quotation. Typical first response covers feasibility and target pricing.
- Conductor / busbar dimensions — ID and OD requirements
- Voltage class and application environment
- Temperature requirement (standard or corona grade)
- Layer construction — insulating or dual-layer
- Estimated annual quantity