LZZBJ71-35 Outdoor Current Transformer
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.