MVCC Medium Voltage Self Locking Overhead Line Insulation Cover for Bare Conductor

Volsun MVCC Medium Voltage Self Locking Overhead Line Insulation Cover for Bare Conductor is a reliable, easy-to-use protective solution designed to boost safety and performance on medium voltage overhead lines. Made for field crews, maintenance teams, and utility companies, this cover helps prevent accidental contact, reduces flashover risk, and protects conductors during work or temporary outages

The cover fits bare conductors and is engineered with a self-locking design that allows quick installation without tools. Its simple snap-on action secures the cover in place and resists slipping under typical field conditions. The user-friendly assembly saves time during live-line work and reduces the need for complex fittings or extra hardware. Lightweight but strong, the cover is easy to carry and handle during routine inspections and emergency repairs

Constructed from high-quality insulating materials, the MVCC cover provides reliable electrical insulation and physical protection. The material resists ultraviolet rays, ozone, moisture, and common pollutants, maintaining its insulating properties over time. This durability lowers replacement frequency and total lifecycle costs. The surface is smooth and easy to clean, helping crews keep equipment in good condition with minimal upkeep

Volsun’s design focuses on compatibility and flexibility. The MVCC cover adapts to a range of conductor sizes commonly found on medium voltage lines. Its form conforms around the conductor to provide consistent insulation and minimize gaps that could allow arcing. The cover’s profile is carefully shaped to balance insulation performance with aerodynamic considerations, helping reduce wind-related stresses once installed

Safety is central to the MVCC cover’s purpose. By adding a visible, insulated barrier over bare conductors, it reduces the risk of accidental contact by personnel, tools, or equipment. The bright, distinctive coloring increases visibility during day and night work. Clear, straightforward markings on each cover indicate correct orientation and installation guidance, supporting safer and more efficient field operations

For utilities and contractors focused on reliable, repeatable workflow, Volsun MVCC covers deliver predictable performance and easy inventory management. The covers are compact and stackable, taking up minimal space in trucks or storage. They are also compatible with standard attachment practices and can be used alongside other temporary insulation products to create comprehensive protection strategies

The Volsun MVCC Medium Voltage Self Locking Overhead Line Insulation Cover for Bare Conductor is a practical, durable, and user-friendly choice for protecting medium voltage conductors. It helps make live-line work safer, speeds up deployment, and reduces maintenance demands—providing clear benefits for crews and asset managers alike

Product Description

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

Technical Performance

Item	Typical Value	Test Method
Electrical Strength Test	≥20V/mm	GB/T 1408.1-2006
Volume Resistivity	≥1×1014Ω·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 17 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

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

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

Certifications

Abroad Exhibition

Las Vagas AAPEX

Moscow Expo

Hannover Messe