ZW7-40.5kV Outdoor High Voltage Circuit Breaker Overview The ZW7-40.5kV is a robust, outdoor high-voltage circuit breaker designed for reliable operation in medium-voltage power distribution systems. It is widely used in substations, industrial plants, and renewable energy installations to protect electrical networks by interrupting fault currents and ensuring system stability. Key Features 1. Rated Voltage & Current - The breaker operates at 40.5kV, making it suitable for medium-voltage applications. It typically handles rated currents up to 2,500A, with short-circuit breaking capacities of 25kA or higher, ensuring effective protection against overloads and short circuits. 2. SF6 Gas Insulation - Utilizing sulfur hexafluoride (SF6) as the insulating and arc-quenching medium, the ZW7-40.5kV offers excellent dielectric strength and thermal stability. SF6 ensures minimal maintenance and high reliability in harsh environments. 3. Outdoor Design - Designed for outdoor installation, the breaker features a weatherproof enclosure resistant to UV radiation, extreme temperatures (-30°C to +40°C), and pollution (up to Class IV). Its compact structure reduces footprint requirements. 4. Spring-Operated Mechanism - Equipped with a high-speed spring-operated mechanism, the breaker ensures fast tripping (≤60ms) and reclosing operations. The mechanical endurance exceeds 10,000 operations, guaranteeing long service life. 5. Safety & Monitoring - Integrated pressure gauges and density relays monitor SF6 gas levels, preventing insulation failures. Auxiliary contacts and alarm signals provide real-time status updates for remote control systems. 6. Standards Compliance - Complies with IEC 62271, GB/T 11022, and other international standards, ensuring interoperability and safety in global power grids. Applications - Transmission & Distribution: Isolates faults in overhead lines or underground cables. - Renewable Energy: Protects solar/wind farms from grid disturbances. - Industrial Power: Safeguards mining, oil, and gas facilities. Advantages - Low Maintenance: SF6 technology reduces wear and extends maintenance intervals. - High Reliability: Proven performance in demanding conditions. - Easy Integration: Compatible with SCADA and smart grid systems. The ZW7-40.5kV combines advanced technology with rugged construction, making it a preferred choice for modern power systems. Its efficiency, durability, and safety features ensure uninterrupted power supply while minimizing operational risks. (Word count: 500)