Designed for power busbars, this LSR protective cover features excellent insulation, flame retardancy, weather resistance and anti-aging performance. It effectively isolates dust, moisture and foreign objects, prevents busbar short circuit and electric leakage risks, with easy installation and strong adaptability, greatly improving the operation safety of power systems.
Material
Industrial LSR
Hardness
Shore A 50-70
Temperature
Certifications
Applications
-60°C ~ +200°C
Colors
Red, Yellow, Green, Blue, Customizable
# Liquid Silicone Protective Cover for Power Busbar
The Liquid Silicone (LSR) Protective Cover for Power Busbar is a high-performance insulating component engineered specifically for the electrical power industry, designed to eliminate short-circuit risks, prevent environmental corrosion, and extend the service life of low, medium, and high-voltage busbar systems. Injection-molded from food-grade, high-purity liquid silicone rubber, this cover offers a seamless, custom fit for straight busbar segments, elbow joints, T-connectors, and busbar terminal connections, eliminating the installation gaps common to traditional heat-shrink or PVC protective sleeves.
At its core, this product combines exceptional dielectric strength, extreme temperature resistance, and long-term weatherability to address the most demanding operating conditions in power distribution infrastructure. Unlike traditional thermoplastic protective components, it maintains stable insulating performance even when exposed to arc flashes, salt spray, UV radiation, and rapid temperature fluctuations, making it suitable for both indoor switchgear and outdoor overhead busbar applications. Its self-extinguishing flame retardant formulation meets UL 94 V-0 requirements, preventing the spread of fire in the event of electrical overheating.
The cover features a snap-fit or peel-and-stick installation design, eliminating the need for specialized tools or heat treatment during assembly, which reduces on-site installation time by up to 70% compared to heat-shrink alternatives. Precision-molded to match the exact dimensions of standard copper and aluminum busbars, it provides full 360° coverage of live conductive surfaces, reducing accidental electric shock risks for maintenance personnel and preventing small animals (such as rodents and birds) from causing accidental short circuits.
Unlike PVC or EPDM busbar sleeves that degrade and lose insulating performance after 5–10 years of exposure to heat or UV radiation, this LSR protective cover maintains stable dielectric strength for over 25 years in outdoor environments. Its high CTI value of 600 V prevents surface tracking and arcing even in heavily polluted, high-humidity operating conditions, reducing unplanned power outage risks by up to 90% compared to unprotected busbars. The non-hygroscopic material formulation ensures insulation performance remains unaffected by rain, fog, or condensation.
The cover can withstand extreme temperature fluctuations from -60°C in cold regional power grids to +220°C in high-load operating busbar systems without cracking, warping, or losing adhesion. It resists degradation from oil, ozone, sulfur dioxide, and other industrial corrosive gases, making it suitable for use in petrochemical plants, coastal power facilities, and mining sites where traditional protective components fail prematurely. UV-stabilized additives prevent discoloration and brittleness even after decades of direct sunlight exposure.
The snap-fit or pressure-sensitive adhesive (PSA) backing design eliminates the need for open-flame heat treatment required for heat-shrink sleeves, eliminating fire hazards during on-site installation. The precision-molded profile fits tightly to busbar edges and joints without cutting or custom trimming, reducing installation labor time by 70% and allowing for retrofitting on energized busbars (when installed by certified personnel using appropriate PPE). No volatile organic compounds (VOCs) are released during installation or operation, making it safe for use in enclosed switchgear rooms with limited ventilation.
The full-coverage design eliminates exposed live conductive surfaces, reducing accidental electric shock risks for maintenance personnel and preventing short circuits caused by small animals, falling metal debris, or dust buildup. The self-extinguishing flame retardant formulation stops burning within 10 seconds of removing the ignition source, and produces no toxic, corrosive smoke during combustion, protecting equipment and personnel in the event of an electrical fire.
This LSR protective cover is widely used across global power transmission and distribution infrastructure, with common use cases including:
All standard covers are sized to match common copper/aluminum busbar dimensions:
For non-standard busbar profiles or custom joints, provide 2D drawings or 3D models for customized molding design.
Our LSR busbar protective covers are manufactured in an ISO 9001, ISO 14001, and ISO 45001 certified production facility, with strict quality control checks implemented at every stage of production:
All products hold CE, CB, and UL certification, and are fully compliant with IEC 60684, GB/T 12168, and DL/T 1585 power industry standards. We provide a 5-year free replacement warranty for all standard products, and a 25-year performance warranty against insulation failure, cracking, or abnormal degradation under normal operating conditions, with full after-sales technical support for installation and maintenance guidance.
