VS1-12kV/630-1250A Vacuum Circuit Breaker with Insulated Tube (Four Holes) The VS1-12kV/630-1250A is a high-performance vacuum circuit breaker (VCB) designed for medium-voltage applications up to 12kV, with a rated current range of 630A to 1250A. This breaker is widely used in power distribution systems, industrial plants, and renewable energy installations due to its reliability, compact design, and advanced insulation technology. Key Features 1. Vacuum Interruption Technology The breaker employs a vacuum interrupter as the arc-extinguishing medium, ensuring minimal maintenance, high dielectric strength, and long service life. The vacuum chamber provides excellent interruption performance for both normal and fault currents, making it suitable for frequent switching operations. 2. Insulated Tube with Four Holes A distinctive feature of this VCB is its insulated tube (four-hole design), which enhances safety and performance. The tube provides robust insulation between phases, reducing the risk of phase-to-phase faults. The four-hole configuration ensures optimal heat dissipation, mechanical stability, and improved dielectric properties. 3. Compact and Modular Design The breaker is designed for fixed or withdrawable installations in switchgear panels. Its compact structure saves space while maintaining high mechanical and electrical endurance. The modular design simplifies maintenance and allows for easy integration into existing systems. 4. High Breaking Capacity With a short-circuit breaking capacity of up to 20kA or higher (depending on configuration), the VS1-12kV/630-1250A ensures reliable protection against overloads and short circuits. The quick-acting mechanism minimizes arc damage, enhancing system safety. 5. Spring-Operated Mechanism The breaker is equipped with a spring-stored energy mechanism, enabling fast and consistent switching operations. It supports manual or motorized operation, providing flexibility for remote or local control. 6. Environmental and Safety Compliance The insulated tube and sealed vacuum interrupter eliminate the need for SF6 gas, making the breaker environmentally friendly. It complies with international standards such as IEC 62271, GB/T, and ANSI, ensuring high reliability in diverse operating conditions. Applications - Power distribution networks (indoor/outdoor switchgear) - Industrial power systems (factories, mining, oil & gas) - Renewable energy integration (solar/wind farms) - Infrastructure projects (railways, airports, data centers) Advantages Over Alternatives - Lower maintenance (no gas or liquid insulation required) - Higher operational lifespan (minimal wear due to vacuum technology) - Enhanced safety (reduced fire and explosion risks) - Energy-efficient operation (low contact resistance) In summary, the VS1-12kV/630-1250A with an insulated tube (four holes) is a robust, efficient, and eco-friendly solution for modern medium-voltage power systems, combining advanced vacuum technology with superior insulation for optimal performance.