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LZZBJ71-35 Outdoor Current Transformer - Reliable 35kV Solution from China Suppliers and Factory
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LZZBJ71-35 Outdoor current transformer.jpg

LZZBJ71-35 Outdoor Current Transformer - Reliable 35kV Solution from China Suppliers and Factory

The LZZBJ71-35 is a premium outdoor current transformer designed specifically for 35kV power transmission and distribution lines, making it an ideal choice for power solutions in China. Manufactured using advanced outdoor epoxy resin vacuum casting technology, this transformer guarantees outstanding durability and insulation performance, even in the most challenging environments. With a comprehensive current ratio range of 10-1500/5(1)A and a versatile accuracy combination of 0.2S/0.5/10P/10P, it provides precise metering, measurement, and dual protection functions in one reliable unit. This current transformer is engineered for optimal performance across high altitudes and varying temperatures, making it a top choice among suppliers and factories seeking dependable power transmission solutions
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    Product Details

    Product Functions

    This transformer serves as a critical multi-functional interface in high-voltage outdoor systems. Its primary role is to accurately sense and convert primary line currents into standardized, isolated secondary signals for various downstream devices. It provides high-accuracy signals for revenue metering and energy management, general measurement signals for system monitoring, and crucially, dual, independent protection-grade outputs. This enables redundant or segregated relay protection circuits, enhancing grid stability and fault response safety within a single installation.

    Applicable Environment

    The LZZBJ71-35 is specifically designed for demanding outdoor 35kV line installations. It is ideal for applications such as overhead line poles, outdoor substation yards, renewable energy farm grid connections (wind/solar), and industrial plant perimeter feed-ins. Engineered for resilience, it operates reliably in high-altitude regions up to 3500 meters and across a wide ambient temperature range from -25°C to +55°C, making it suitable for diverse geographical and climatic conditions, from cold highlands to hot plains.

    Product Highlights
    • All-in-One Functional Integration Its standout 0.2S/0.5/10P/10P grade combination with corresponding secondary loads (20/30/30/30VA) consolidates four critical functions—precision metering, general measurement, and dual protection—into one compact device. This design simplifies system architecture, reduces installation points, and saves significant space and cost.
    • Superior Outdoor Durability The use of outdoor epoxy resin vacuum casting technology provides a seamless, full-seal insulation body. This offers outstanding resistance to moisture, pollution, UV radiation, and mechanical impact, ensuring long-term operational stability and minimal maintenance in exposed environments.
    • Exceptional Environmental Robustness Certified for operation at altitudes up to 3500 meters and extreme temperatures (-25°C to +55°C), it delivers reliable performance in geographically challenging installations where many standard products may fail.
    • Wide Application Flexibility A broad rated current ratio (10~1500/5(1)A) accommodates virtually all common load scenarios in 35kV systems, offering exceptional versatility for system designers and engineers. Its compliance with GB20840.1 and GB20840.2 underscores its adherence to stringent national safety and performance standards.
    Frequently Asked Questions
    Q What voltage class is the LZZBJ71-35 current transformer designed for?
    The LZZBJ71-35 is specifically engineered for 35kV class outdoor high-voltage line installations, making it suitable for overhead line poles, outdoor substation yards, and renewable energy grid connection points.
    Q How many secondary outputs does this current transformer provide, and what are their accuracy grades?
    It provides four secondary outputs with a combined grade of 0.2S / 0.5 / 10P / 10P. The 0.2S grade is for high-precision revenue metering, 0.5 is for general measurement and monitoring, and the two 10P grades serve dual, independent protection relay circuits.
    Q What is the rated current ratio range available for this transformer?
    The LZZBJ71-35 supports a broad rated primary current range of 10 to 1500A, with a standard secondary output of 5A or 1A, written as 10~1500/5(1)A. This wide range accommodates virtually all common load scenarios in 35kV systems.
    Q Can this unit be used in high-altitude or extreme temperature environments?
    Yes. The LZZBJ71-35 is certified for reliable operation at altitudes up to 3500 meters above sea level and across an ambient temperature range of -25°C to +55°C, making it well-suited for mountainous regions, cold highland areas, and hot plains alike.
    Q What insulation technology is used, and why does it matter for outdoor use?
    The transformer uses outdoor epoxy resin vacuum casting technology, which creates a seamless, fully sealed insulation body. This construction provides excellent resistance to moisture ingress, environmental pollution, UV radiation, and mechanical impact — all critical factors for long-term reliability in exposed outdoor installations.
    Q Which standards does the LZZBJ71-35 comply with?
    The LZZBJ71-35 complies with GB20840.1 and GB20840.2, which are China's national standards governing instrument transformers. These standards ensure the product meets stringent safety, accuracy, and performance requirements for use in power system applications.