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Steel Support Insulator for Rail Power Supply System

This Steel support insulator for rail power supply system is designed for steel bracket type contact rail power systems in urban rail transit. Manufactured from glass fiber reinforced composite material using compression molding, the unit provides reliable insulation and mechanical support under service conditions.

The component meets relevant enterprise standards and customer technical requirements, ensuring consistent performance in DC traction power environments.

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    Product Details
    TECHNICAL PARAMETERS
    Parameter Requirement
    Power frequency wet withstand voltage ≥ 25 kV
    Power frequency dry withstand voltage ≥ 50 kV
    Full lightning impulse flashover voltage ≥ 50 kV
    Pollution withstand voltage (0.3 mg/cm² salt density) ≥ 5 kV
    Vertical static load ≥ 3 kN
    Horizontal lateral static load ≥ 5 kN
    Horizontal longitudinal static load ≥ 3 kN
    PRODUCT OVERVIEW

    The steel-support insulator (also available as steel-post insulator and steel-bracket insulator configurations) is specifically engineered for conductor rail (third rail) power supply systems in urban rail transit applications. Manufactured from glass fibre reinforced composite material using compression moulding, this insulator provides reliable electrical isolation and mechanical support between the steel bracket and the live conductor rail. The component complies with relevant enterprise standards and customer technical requirements, ensuring consistent performance in DC traction power environments.

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    APPLICATION SCENARIOS

    This insulator assembly on steel support is widely deployed in urban rail transit systems, including subways, light rail, and commuter railways utilising third-rail current collection. Typical installation locations include tunnel walls, viaducts, and at-grade track sections where steel brackets support the conductor rail. The steel-supported insulator assembly serves as a critical interface between the steel mounting bracket and the conductor rail, preventing current leakage while withstanding mechanical loads from train operation.

    In metro systems, steel bracket assemblies are typically installed at intervals along the track alignment. The insulator accommodates both vertical and horizontal adjustment during installation, allowing for precise positioning of the conductor rail relative to the running rails. This adjustability proves essential in tunnels where space constraints and varying structural geometries demand flexible mounting solutions. The assembly also supports the protective cover system that shields the conductor rail from environmental exposure and accidental contact.

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    KEY CHARACTERISTICS
    • Glass fibre reinforced composite construction offers high mechanical strength and excellent dielectric properties.
    • Compression moulding ensures consistent dimensional accuracy and material density.
    • Resistant to environmental factors including moisture, dust, and temperature variations
    • Compatible with both top-contact and side-contact current collection systems.
    • Available in steel-support, steel-post, and steel-bracket insulator variants to suit diverse mounting configurations.
    • The insulator assembly on steel support facilitates straightforward field installation and replacement.
    COMPLIANCE & LEAD TIME

    Steel support insulator for rail power supply system complies with relevant enterprise standards and customer technical requirements. It is specifically designed for DC750V conductor rail power supply systems on conventional railways.

    Quality Assurance

    We have tight control over incoming raw materials. Every batch is tested in our lab before it enters the factory. We only release a batch for production once we've confirmed that its properties meet our requirements.
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    Steel support insulator for rail power supply system sampling inspections are carried out at three stages: before production begins, during the manufacturing process, and after completion.
    All tests are performed in our own laboratory. The lab holds CNAS accreditation, so our test results are accepted under international standards.
    Lead time: 7 to 30 days, not including design or mold development.ap1
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    Production Capacity

    Our Steel support insulators for rail power supply system are manufactured on a fully automated production line. The facility is capable of producing around 100,000 sets per year.

    Custom Mould Design & Manufacturing

    – In-House, Start to Finish
    Our Mould Engineering Department operates a full digital workshop equipped with more than 20 CNC machines, including machining centres, spark eroders, and wire cutters. This allows us to design and manufacture a wide range of moulds for the rail transit industry – injection moulding, rubber, SMC, and specialised types such as auto-core-pulling bush moulds.

    Annual output stands at 300 sets of moulds and tooling.

    If your project calls for a non-standard shape for Elastic Ballast Mat, a special material, or a unique production feature, we have the equipment and the experience to deliver.
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