Manufacturer of Electrical Insulation Sleeving Self Locking Silicone Overhead Line Cover

Product Description

Self-locking Silicone Overhead Line Cover

Self-locking silicone overhead line cover is made of high quality silicone rubber material, with excellent electrical, anti-leakage marking performance, excellent weather resistance, high mechanical properties, with hydrophobic and hydrophobic migration characteristics, high and low temperature resistance is extremely excellent. It is convenient and simple to install, saves labor and time, and is used for insulation protection of cables and wires, and increases the safe distance between objects and cables/ wires

Features:

* Soft and resistant to bending

* Long service life, aging resistance, corrosion resistance

* Flame retardant performance: V-0, non-flame retardant can be customized

* Color: Red, Gray customizable

* Easy installation, no flame required, short power-off construction time

Support customization

Contact us for free samples

VR

Technical Performance

Item	Typical Value	Test Method
Electrical Strength Test	≥20V/mm	GB/T 1408.1-2006
Volume Resistivity	≥1×10^14Ω·cm	GB/T 1410-2006
Dielectric Constant	2～3	GB/T 1409-2006
Shore Hardness	70±5A	GB/T 531
Mechanical Properties Before Heat Ageing
Tensile Strength	≥4.0MPa	GB/T 528
Elongation at break	≥200%	GB/T 528
After Heat Ageing 180℃, 7d
Tensile Strength Change	±30%	GB/T 528
Elongation Change	±30%	GB/T 528
Low Temperature Elongation -15℃, 2h	≥20%	GB/T 2951.4-1997
Low Temperature Flexibility -50℃, 4h	No cracks	UL224-2004
High Temperature Crack Resistance 155℃, 2h	No cracks	GB/T2951.6-1997

Dimensions

LJ Type Aluminum Strand Applicable Product Selection Table
Nominal cross-sectional area mm²	Nominal outside diameter mm	Specifies the specifications of the insulation bushing mm
16	5.10	Ф 8
25	6.45	Ф 10
35	7.50	Ф 10
50	9.00	Ф 12
70	10.80	Ф 14
95	12.50	Ф 16
120	14.25	Ф 18
150	15.75	Ф 20
185	17.50	Ф 22
240	20.00	Ф 24
300	22.40	Ф 28
400	25.90	Ф 32
500	29.12	Ф 35

Size is available to customize

Voltage Level and Wall Thickness Level Corresponding Table
Votalge Rate	≤10kV	≤35kV	≤110kV	≤220kV
Wall Thickness	2.0±0.3mm	2.6±0.4mm	4.0±0.5mm	6.0±1.0mm

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 18 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
Up to now, Volsun cooperated with customers from 88 countries, we offer suitable sealing, waterproof solutions for some well-know enterprises in communication, Automobile, Power industry etc

Certifications

Abroad Exhibition

Las Vagas AAPEX

Moscow Expo

Hannover Messe

Packing & Delivery

Trade terms	FOB, EXW, CIF, DDU, DDP, CFR
Payment terms	T/T, L/C, Negotiable
MOQ	100M
Supply capability	1,000,000 mts per month
Lead time	Usually 3-5 working days
Shipment	Express, Air, Sea
Port	Shanghai, Ningbo, Shenzhen
Sample availability	Yes
Sample time	Usually 1-3 days
Packaging	Normal: Plastic bag & Carton & Pallet Special: Customized packing

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 its Manufacturer of Electrical Insulation Sleeving Self Locking Silicone Overhead Line Cover, an engineered solution designed to elevate overhead line safety, extend service life, and simplify field deployment. This product integrates advanced silicone materials with a unique self locking cover mechanism to deliver reliable insulation sleeving performance under the most demanding environmental and operational conditions. The combination of insulation sleeving, overhead line safety, silicone line cover, and self locking cover attributes makes this offering ideal for utilities, contractors, and industrial operators who require rapid installation, durable protection, and compliance with industry standards

Product Overview

The Volsun self locking silicone overhead line cover is an insulation sleeving system engineered specifically for overhead line safety applications. Constructed from high-grade silicone rubber, the silicone line cover resists weathering, UV, ozone, and a wide range of contaminants while maintaining flexibility and dielectric strength across extreme temperatures. The insulation sleeving design is optimized for common conductor sizes and configurations, offering consistent electrical insulation and mechanical protection against accidental contact, flashover, and environmental degradation

Key Features

- Durable silicone construction: The silicone line cover is formulated for long-term resilience against ultraviolet radiation, pollution, salt spray, and temperature cycling, ensuring continuous overhead line safety without frequent replacement

- Self locking cover mechanism: Our self locking cover enables tool-free installation and secure fastening that resists vibration and wind. The self locking cover design reduces labor time, improves safety during installation, and minimizes the risk of cover displacement

- Versatile insulation sleeving sizes: The product family includes multiple diameters and lengths of insulation sleeving to accommodate single conductors, bundled conductors, splices, and insulator protection needs, ensuring reliable coverage across varied overhead configurations

- Enhanced dielectric performance: The silicone material provides excellent dielectric strength and arc resistance, critical for effective insulation sleeving performance in power distribution and transmission systems

- Lightweight and flexible: The silicone line cover delivers a low-profile solution that maintains conductor flexibility and sag characteristics while adding protective insulation sleeving for overhead line safety

- Chemical and moisture resistance: The formulation prevents degradation from hydrocarbons, acid rain, and industrial pollutants, preserving the insulating properties of the silicone line cover in contaminated environments

- Temperature stability: Engineered for a wide operational temperature range, the insulation sleeving keeps elasticity and electrical performance from cold winters to hot summers, maintaining overhead line safety throughout seasonal cycles

- Compliance and testing: Volsun’s self locking cover and silicone line cover assemblies undergo rigorous testing for dielectric strength, UV resistance, mechanical load, and ageing to meet industry standards for insulation sleeving and overhead line safety

Applications

Volsun’s silicone line cover and insulation sleeving systems are ideal for:

- Live-line maintenance and temporary protection where overhead line safety must be ensured without de-energizing circuits

- Splice and connector protection to reduce corona, prevent moisture ingress, and maintain dielectric integrity across jointed sections

- Phase-to-phase and phase-to-ground protection on distribution and transmission networks to minimize the risk of accidental contact

- Construction and emergency repair crews needing rapid deployment of reliable insulation sleeving and self locking cover solutions

- Insulator protection and corona mitigation on overhead supports exposed to pollution and salt-laden coastal conditions

- Renewable and suburban distribution networks where aesthetic, flexible, and durable silicone line cover solutions are preferred

Innovation and Technical Advantages

Volsun’s Manufacturer of Electrical Insulation Sleeving Self Locking Silicone Overhead Line Cover stands out for integrating innovation into practical field advantages:

- Self locking cover engineering: The patented self locking cover geometry secures the silicone line cover on conductors without permanent clamps or adhesives. This innovation simplifies inventory and logistics by reducing the need for specialized fasteners and allows crews to install insulation sleeving faster while maintaining overhead line safety

- Material science optimization: Volsun’s silicone compound balances elongation, tear strength, and dielectric performance. This optimization enhances the insulation sleeving’s resistance to mechanical damage and aging while preserving the flexibility necessary for a variety of conductor movements and installation techniques

- Rapid deployment kit design: The product line supports modular deployment kits that include pre-sized insulation sleeving segments, self locking cover components, and accessory seals. Kits enable field teams to respond quickly to outages or planned maintenance with consistent overhead line safety outcomes

- Low maintenance lifecycle: The silicone line cover’s resistance to environmental attack reduces inspection frequency, lowers lifecycle costs, and supports long-term overhead line safety strategies by preventing accelerated insulation failure

- Compatibility and retrofit capability: Insulation sleeving segments and self locking cover components are compatible with existing overhead line hardware, allowing utilities to retrofit protection to existing spans without major redesign or conductor replacement

- Predictable aging characteristics: Manufacturing controls and accelerated ageing data provide utilities with reliable service-life forecasts for insulation sleeving and silicone line cover components, aiding asset management and replacement planning

Installation and Field Use

Installation of Volsun’s self locking silicone overhead line cover emphasizes safety and simplicity. The self locking cover snaps into place around conductors, requiring minimal tooling and allowing for single-operator application in many scenarios. Insulation sleeving units can be applied to live lines by trained personnel using established hot-stick procedures, preserving overhead line safety during maintenance operations. The silicone line cover conforms to conductor surfaces to provide continuous insulation sleeving coverage, and the self locking cover mechanism resists loosening under wind-induced conductor vibration

Performance and Reliability

The silicone line cover demonstrates long-term stability in dielectric strength, mechanical toughness, and environmental resistance, which together support a high-reliability insulation sleeving solution for overhead line safety programs. Field trials and accelerated testing confirm that the self locking cover maintains attachment under mechanical stress and thermal cycling, ensuring that insulation sleeving remains effective through seasonal and operational changes. The material’s low moisture absorption and hydrophobic characteristics further ensure that the silicone line cover prevents water film formation and reduces contamination-related leakage risks

Why Utilities Choose Volsun

Utilities and contractors choose Volsun for insulation sleeving and overhead line safety because our self locking cover and silicone line cover solutions reduce installation time, minimize inventory complexity, and deliver predictable long-term performance. Volsun’s manufacturing expertise and quality assurance practices ensure consistent product performance so that overhead line safety strategies can rely on the insulation sleeving to protect personnel, equipment, and public assets

Volsun’s Manufacturer of Electrical Insulation Sleeving Self Locking Silicone Overhead Line Cover merges high-performance silicone materials with an innovative self locking cover design to deliver a dependable insulation sleeving solution. Tailored for overhead line safety, the silicone line cover system addresses the needs of utilities, contractors, and field teams seeking effective, low-maintenance protection for conductors, splices, and insulators. With proven technical advantages, ease of installation, and robust environmental resistance, Volsun’s insulation sleeving and self locking cover offering represents a practical and durable choice for modern overhead line safety programs