ZN6(VS1) 12KV 1250A Vacuum Circuit Breaker – Technical Overview The ZN6(VS1) is a high-performance, medium-voltage vacuum circuit breaker designed for reliable operation in 12KV power distribution systems. Rated at 1250A, it is widely used in industrial plants, substations, and commercial power networks to ensure safe and efficient interruption of electrical faults. Its compact design, advanced vacuum interrupter technology, and robust mechanical construction make it suitable for demanding applications. Key Features 1. Vacuum Interruption Technology The breaker employs a vacuum interrupter as the arc-quenching medium, ensuring minimal contact erosion and long service life. The vacuum environment (typically below 10^-4 Pa) provides superior dielectric strength, enabling fast and reliable interruption of short-circuit currents up to 25-31.5KA (depending on the model). 2. Compact and Modular Design The ZN6(VS1) features a space-saving, withdrawable design, allowing easy installation and maintenance. Its modular construction includes a spring-operated mechanism, ensuring quick and consistent switching operations. 3. High Breaking Capacity With a rated short-circuit breaking current of up to 31.5KA, the breaker effectively protects electrical systems from overloads and short circuits. The vacuum interrupter ensures minimal arc energy, reducing wear and tear. 4. Spring Operating Mechanism The breaker utilizes a high-energy spring mechanism for fast, reliable opening and closing operations. The stored-energy mechanism ensures consistent performance even under frequent switching conditions. 5. Safety and Reliability - Insulation: High-quality epoxy resin insulation provides excellent dielectric properties and resistance to environmental factors. - Mechanical Endurance: Rated for over 10,000 mechanical operations, ensuring long-term reliability. - Protection Features: Integrated auxiliary switches, undervoltage releases, and shunt trip options enhance system protection. 6. Environmental Adaptability The ZN6(VS1) operates efficiently in a wide temperature range (-15°C to +40°C) and high-humidity conditions, making it suitable for diverse industrial environments. Applications - Power Distribution: Used in switchgear panels for transformer protection, feeder control, and motor circuits. - Industrial Systems: Protects manufacturing plants, mining operations, and data centers from electrical faults. - Renewable Energy: Integrates into solar and wind power systems for safe grid interconnection. Advantages Over Alternatives - Low Maintenance: Vacuum technology eliminates the need for gas or oil replenishment. - Eco-Friendly: No SF6 gas emissions, aligning with green energy standards. - High Speed: Faster interruption compared to air or oil circuit breakers. Conclusion The ZN6(VS1) 12KV 1250A vacuum circuit breaker is a robust, efficient, and maintenance-free solution for medium-voltage protection. Its advanced vacuum interruption, high breaking capacity, and modular design make it a preferred choice for modern power systems. Whether in industrial, commercial, or utility applications, it ensures reliable performance and enhanced safety.