Description

330~500kV Metal Oxide Surge Arresters are critical protective devices engineered for high-voltage power transmission and distribution networks operating within the 330kV to 500kV range. These arresters integrate high-performance metal oxide varistors (MOVs) into robust housings (typically composite or porcelain) to suppress transient overvoltages caused by lightning strikes, switching operations, or system faults. Installed near transformers, circuit breakers, and transmission line terminals, they divert excessive surge currents to the ground while clamping voltage levels to safe thresholds, safeguarding grid infrastructure from insulation damage and ensuring uninterrupted power supply.

Features

• High-Voltage Optimization：Rated specifically for 330kV to 500kV systems, with electrical parameters precisely calibrated to handle the high-voltage stresses of bulk power transmission, ensuring compatibility with grid equipment in this voltage class.

• Superior Surge Handling：Equipped with MOVs designed to absorb large surge energies from severe events like direct lightning strikes or substation faults, limiting voltage spikes to levels within the insulation tolerance of high-voltage equipment.

• Fast Response Time：Ultra-rapid reaction to transient overvoltages (microsecond-scale) ensures minimal voltage overshoot, critical for protecting sensitive components like transformer windings and circuit breaker insulation.

• Environmental Resilience：Housings (composite silicone rubber or high-strength porcelain) resist UV radiation, extreme temperatures, and pollution, making them suitable for harsh outdoor environments—from coastal areas to high-altitude regions.

• Low Leakage Current：Minimal leakage current during normal operation reduces energy loss and heat generation, enhancing efficiency and extending the lifespan of both the arrester and connected grid equipment.

• Mechanical Durability：Robust construction withstands mechanical stresses from wind, vibration, and installation, ensuring structural integrity even in high-voltage substations with heavy equipment and frequent maintenance activities.

• Compliance with Global Standards：Meets international standards (e.g., IEC 60099-4, IEEE C62.11) for high-voltage arresters, undergoing rigorous testing for impulse withstand, thermal stability, and long-term reliability to ensure seamless integration into global power grids.

• Easy Installation & Maintenance：Designed with standardized mounting interfaces and lightweight composite options (where applicable) to simplify installation. Stable performance minimizes the need for frequent inspections, reducing lifecycle costs.