Volsun High Voltage 35kV Silicone Busbar Heat Shrink Tube for Copper Protection and Insulation

Product Overview

MPRS-MV Medium Voltage Heat shrink busbar sleeve

MPRS-MV Medium Voltage Heat shrink busbar sleeve, a kind of continuous tube shape material made of radiation cross-linked polyolefin, carry excellent insulating performance. Typical applications include insulation of electrical bus bar rated up to 24KV or higher voltage ratings, rectangular, square and round bus bars, inline bolted connections of rectangular bus bars, copper or aluminum bus bars, metal-clad switchgear, metal-enclosed bus bar, substation switchgear etc

Features:

1. Shrink ratio: 2:1

2. Tracking resistant, low smoke emitting, high strength, flexible, flame retardant

3. Min. shrink temperature: ≥84°C

4. Min. full recovery temperature: ≥120°Cwhich can be sealed and waterproof

5. Continuous operating temperature: -55°C~125°Cintermediate joints

6. RoHS compliant

7. Standard Package :Black, White, Red, Yellow, Green, Blue. More colors are available upon request

PRODUCT SPECIFICATIONS

Performance	Index	Test Method
Tensile Strength	≥8.0MPa	ASTM D 2671
Elongation at break	≥300%	ASTM D 2671
Tensile strength after heat aging	≥6.9MPa	130℃×168h
Elongation after heat ageing	≥100%	130℃×168h
Longitudinal change	-8%～+8%	ASTM D 2671
Oxygen index	≥27	GB/T 2406
Heat Shock	无裂纹	JB 7829 附录D
Breakdown strength	≥20kV/mm	ASTM D 149
Shore A Hardness	≤90	GB2411
Volume resistivity	≥1014Ω. cm	IEC 60093

Dimensions

Size	Supplied I. D. mm	Flattening width mm	Wall Thickness before shrink w mm	After Full Recovered mm			Standard Package M/Roll
				Size		Width（mm）		Thickness（mm）	I. D	Wall Thickness
Φ16	18.0 ±2.0	28 ±3	0.85±0.3	≤9.0	1.5±0.3	25
Φ20	22.0 ±2.0	35 ±3	0.85±0.3	≤11.0	1.5±0.3	25
Φ25	25.5 ±2.0	40 ±3	0.9±0.3	≤13.0	1.7±0.3	25
Φ30	31.5 ±3.0	50 ±4	0.9±0.3	≤16.0	1.75±0.3	25
Φ40	41.0 ±3.0	65 ±4	0.9±0.3	≤21.0	1.75±0.3	25
Φ50	51.0 ±3.0	80 ±4	0.95±0.3	≤26.0	1.8±0.3	25
Φ60	61.0 ±3.0	96 ±5	1.0±0.3	≤31.0	2.0±0.3	25
Φ65	63.5 ±3.0	100 ±5	1.0±0.3	≤33.0	2.0±0.3	25
Φ70	70.0 ±3.0	110 ±5	1.0±0.3	≤36.0	2.0±0.3	25
Φ80	80.0 ±3.0	125 ±5	1.0±0.3	≤42.0	2.0±0.3	25
Φ90	90.0 ±3.0	143 ±5	1.0±0.3	≤47.0	2.0±0.3	25
Φ100	100.0 ±4.0	158 ±5	1.1±0.4	≤55.0	2.1±0.3	25
Φ120	120.0 ±4.0	188 ±5	1.1±0.4	≤65.0	2.2±0.3	25
Φ150	150.0 ±4.0	234 ±5	1.2±0.4	≤80.0	2.3±0.4	25
Φ180	180.0 ±4.0	280 ±5	1.4±0.4	≤95.0	2.5±0.4	25

Special sizes or packing are available on request

Company Show

Suzhou Volsun Electronics Technology Co., Ltd. was founded in 2006. We keep focusing on the R&D, production and sales in insulation, sealing & protection solutions for over 20 years
Quality is our culture. Volsun has a modern quality management system, which has passed a series of quality system certification such as IATF16949, ISO9001 etc. And we have gained some advanced titles such as Jiangsu famous scientific and technical corporation, China new high-tech enterprise etc. have independent intellectual property rights, 88 patents and 97 product certifications

Packing & Delivery

Trade terms	FOB, EXW, CIF, DDU, DDP, CFR
Payment terms	T/T, L/C, Negotiable
MOQ	1
Supply capability	1,000,000 mets per month
Lead time	Usually 2-3 working days
Shipment	Express, Air, Sea
Port	Shanghai, Ningbo, Shenzhen
Sample availability	Yes
Sample time	Usually 1-2 days
Packaging	Normal: Plastic bag & Carton & Pallet Special: Customized packing

Contact Us for free samples

Certificate

Abroad Exhibition

Las Vagas AAPEX

Moscow Expo

Hannover Messe

FAQ

Q 1. How long is the payment term
A: We accept T/T 50% deposit and 50% balance against B/L or L/C copy at sight, also accept Western Union, VISA and Paypal

Q 2. What is the normal lead time for product orders
A: The average lead time for prototype/first piece is 7~10 days, if tooling is involved, the lead time for production tooling is 10 days, and the average production time after sample approval is 2-3 weeks

Q 3. What is your standard packaging
A: All goods will be packed in cartons and loaded on pallets. Special packing methods are acceptable when needed

Q 4. Can you tell us the monthly production capacity of your products
A: It depends on the model, we produce more than 1500 tons of rubber materials per month

Q 5. What kind of certificates do you have
A1: We have ISO9001:2015, IATF16949:2016, ISO14001:2015, ISO45001:2018 certified
A2: We have various rubber compounds approved by UL, ROHS and REACH

Q6: How to check the quality of bulk order
A1: We provide pre-production samples to all customers before mass production if needed
A3: We accept third-party inspection, such as SGS, TUV, INTERTEK, BV, etc

Q 9: Can you provide customized service
A: Yes, we accept customization and can produce products in different sizes, packaging, colors according to requirements

Volsun presents the Volsun High Voltage 35kV Silicone Busbar Heat Shrink Tube for Copper Protection and Insulation, a purpose-engineered solution designed to meet the rigorous demands of modern high-voltage systems. This 35kV silicone busbar tube is developed to deliver reliable high-voltage insulation, robust busbar protection solutions, and long-term electrical safety for power distribution networks, switchgear, transformers, and industrial electrical assemblies. As an advanced silicone heat shrink tube, it offers superior mechanical, thermal, and dielectric properties that make it the preferred choice for engineers and OEMs seeking a durable, high-performance insulating sleeve

Product Overview and Core Features

The Volsun 35kV silicone busbar tube is a high-voltage insulation sleeve specifically formulated to protect copper busbars and conductors against electrical stress, environmental contamination, mechanical abrasion, and thermal cycling. The silicone heat shrink tube construction ensures tight, conformal coverage of busbars once installed, creating a resilient barrier that enhances overall electrical integrity. Designed to satisfy stringent safety standards and extended service life, this silicone busbar tube supports reliable operation under extreme conditions, providing peace of mind for utility operators and industrial maintenance teams

Key features include:

- Rated for 35kV service, offering dependable high-voltage insulation for medium- and high-voltage applications

- Premium silicone elastomer formulation providing exceptional dielectric strength, low partial discharge characteristics, and excellent arc resistance

- Heat shrink capability enabling precise, tight-fitting busbar protection solutions and seamless insulation over terminals, joints, and irregular surfaces

- Superior thermal stability for continuous operation across a wide temperature range, maintaining performance under thermal cycling and elevated ambient conditions

- Outstanding weather ability and UV resistance for outdoor and exposed installations

- Flame-retardant and self-extinguishing properties to enhance safety in electrical cabinets and industrial environments

- Chemical and moisture resistance to reduce degradation from oils, solvents, humidity, and corrosive atmospheres

Applications and Use Cases

This 35kV silicone busbar tube is engineered for a broad array of applications where dependable high-voltage insulation and busbar protection solutions are critical:

- Power distribution switchgear and panel assemblies, where insulating busbars, connectors, and transition points enhances safety and reduces flashover risk

- Distribution transformers and substations, providing high-voltage insulation for busbars and bus duct systems

- Industrial power systems and heavy machinery where busbar protection solutions reduce the risk of accidental contact and environmental contamination

- Renewable energy installations such as solar farms and energy storage systems, which require high-voltage insulation materials with long-term UV stability and weather resistance

- Rail and transit electrification systems that demand robust high-voltage insulation components for overhead, third-rail, and traction power distribution

- OEM manufacturing of electrical components, where silicone heat shrink tube solutions facilitate assembly, insulation, and quality control

Innovative Design and Material Advantages

Volsun’s silicone heat shrink tube integrates advanced polymer research and tailored manufacturing processes to deliver a product that stands out in several respects

- Tailored Silicone Formulation: The busbar tube uses an engineered silicone elastomer blend that optimizes dielectric strength while maintaining flexibility and mechanical resilience. This choice of material minimizes cracking and embrittlement over time, especially in low-temperature or fluctuating thermal conditions

- Precise Heat Shrink Properties: The tube’s controlled shrink ratio and memory characteristics ensure reliable recovery around complex geometries and irregular copper surfaces. This yields uniform insulating thickness and reduces voids or gaps that could compromise high-voltage insulation performance

- Low Partial Discharge and Dielectric Loss: By minimizing voids and using high-purity silicone materials, the silicone busbar tube reduces partial discharge inception and dielectric losses, thereby extending component lifetime and improving system reliability

- Enhanced Flame Retardancy and Safety: Volsun’s silicone formulation includes flame-retardant additives to ensure the tube meets strict safety criteria. In the event of electrical faults, the silicone heat shrink tube resists combustion and helps contain failure propagation

- Moisture and Chemical Resistance: The silicone composition resists degradation from moisture ingress and common industrial contaminants, protecting copper busbars from corrosion and preserving electrical conductivity at contact points

- Wide Temperature Performance: The silicone busbar tube remains pliable and dimensionally stable across a broad temperature range, supporting installations in harsh environments and ensuring consistent high-voltage insulation behavior

Manufacturing Excellence and Quality Assurance

Volsun’s legacy in polymer materials research and production underpins the consistent quality of the 35kV silicone busbar tube. With decades of R&D experience and robust quality systems, the product benefits from rigorous testing and production controls:

- Strict dielectric and breakdown testing to validate 35kV performance under standardized test protocols

- Mechanical and thermal cycling assessments to confirm long-term dimensional stability and shrink-back retention

- Environmental stress screening for UV exposure, humidity, and chemical resistance to assure field durability

- Conformance to industry certifications and OEM specifications with traceable quality documentation, reflecting Volsun’s commitment to reliability

Installation and Handling

The silicone heat shrink tube is designed for efficient field installation by trained technicians. The tube’s shrink characteristics facilitate rapid, secure application over copper busbars, joints, and terminations. Installation typically involves:

- Cutting the silicone busbar tube to the required length

- Positioning the tube over the busbar or joint area

- Applying controlled heat to activate shrinkage and achieve a snug, conformal fit

- Optional use of compatible adhesives or sealants when environmentally sealed encapsulation is required

Value Proposition for Customers

Selecting the Volsun 35kV silicone busbar tube delivers tangible benefits:

- Reduced downtime and maintenance costs due to enhanced protection and longer service intervals

- Lower risk of electrical faults, flashover, and arc-related damage in high-voltage systems

- Improved safety for personnel and equipment via superior insulating performance and flame retardant

- Compatibility with OEM assembly processes, enabling streamlined integration into pre-fabricated units and retrofit projects

Why Volsun

Founded in 2006, Volsun brings two decades of focused expertise in polymer materials R&D, production, and sales. As a National High-tech Enterprise, Volsun holds numerous patents and certifications, reflecting deep technical capability in insulation, fireproofing, and thermal solutions. The company supports thousands of customers worldwide with tailored OEM/ODM offerings and adheres to stringent quality standards. When you choose the Volsun 35kV silicone busbar tube, you partner with an experienced supplier committed to performance, safety, and continuous innovation in busbar protection solutions

The Volsun High Voltage 35kV Silicone Busbar Heat Shrink Tube for Copper Protection and Insulation represents a high-performance, reliable solution for demanding high-voltage insulation challenges. As a silicone heat shrink tube specifically engineered for 35kV service, it provides excellent dielectric strength, thermal stability, chemical resistance, and flame-retardant safety—making it an ideal choice for utilities, industrial operators, OEMs, and integrators seeking proven busbar protection solutions and superior high-voltage insulation performance