This single-insulated cantilever insulator is purpose-built for the 25kV/27.5kV voltage level in the railway context. As the railway power supply system functions, it efficiently segregates the electrical conductors from the cantilever's support structure, averting electrical leakage and safeguarding the integrity of the entire contact network. Besides the core insulation function, it must adhere to specific railway technical norms. For instance, it has to endure the incessant vibrations induced by passing trains and maintain stable performance within the intricate electromagnetic environment along the railway tracks. During the design phase, engineers consider factors such as material durability and structural integrity to ensure it can withstand the rigors of railway operation. In production, strict quality checks are implemented to guarantee each insulator meets the required standards.
There are certain differences between insulators used in electrified railways and those in power grid systems in terms of materials, design, and application. For example, the Cantilevers in the electrified railway catenary system are similar to the Cross-arms of transmission line towers. However, due to the strong wind and high-frequency vibrations generated when trains pass at high speeds, the Cantilevers must be installed between the contact network wires and insulators, and a flexible buffer structure should be designed to reduce the mechanical impact on the insulators. In contrast, Insulated Cross-arms have completely replaced Mental Cross-arms in the power system. Cantilever Insulators not only need to bear the weight of the contact network wires but also that of the Cantilevers. Therefore, Cantilever Insulators should be designed with more durable forged fittings and thicker core rods.
The 25kV/27.5kV Single-insulated Cantilever Insulator exhibits outstanding characteristics. It provides superior insulation capabilities, ensuring dependable separation between electrical elements even under tough railway conditions. Possessing high mechanical robustness, it can securely hold the electrical conductors on the cantilever, undeterred by the external forces during train movement. Additionally, it demonstrates good resistance to environmental variables such as dust, wind, and temperature fluctuations typical of railway surroundings.
Standards:
IEC 62621-2011; TB/T 3199.2-2018; Q/CR 549-2016
Specifications:
Application:
It is predominantly utilized on the cantilever of the electrified railway contact network. Its primary function is to support the electrical conductors and uphold electrical insulation, which is vital for the stable power supply and the safe running of trains.
Features:
● High Dependability:
Meeting the exacting demands of the railway sector, it can function stably over extended periods, minimizing maintenance needs and ensuring the seamless operation of the railway.
● Railway-specific Design:
Its architecture and material choices are fine-tuned in line with the unique features of the railway environment, making it more resilient to the challenges presented by railway operations compared to standard power system insulators.
● Excellent Anti-pollution Capability:
Given the diverse pollutants present along the railway, it features an effective anti-pollution design to prevent easy degradation of its insulation performance, thus ensuring the safety of the railway power supply network.
● Robust Vibration Tolerance:
With remarkable vibration resistance, it can adeptly handle the vibrations generated by passing trains and preserve its position and insulation function on the cantilever.
