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The VS1-12 Indoor High Voltage Vacuum Circuit Breaker is a high-performance electrical switching device designed for three-phase AC 50Hz systems with a rated voltage of 12kV. This vacuum circuit breaker is a trusted choice for industrial and mining enterprises, power plants, substations, and electrical facilities, delivering exceptional control and protection. Its durability and ability to handle frequent operations make it ideal for demanding environments.
What is the VS1-12 Vacuum Circuit Breaker?
The VS1-12 series is built for indoor applications, combining an integrated operating mechanism with the breaker body for a compact and robust design. It can be installed as a fixed unit or paired with a specialized push mechanism to create a withdrawable unit. Featuring a fully-sealed pole structure, this vacuum circuit breaker offers a small footprint, high reliability, and minimal maintenance. It integrates effortlessly with switchgear systems like KYN28A-12(GZS) and XGN series fixed-type switchgear.

Key Features of the VS1-12 Vacuum Circuit Breaker
- Rated Voltage: 12kV
- Frequency: 50Hz
- Indoor Use: Perfect for industrial plants, power stations, and electrical facilities.
- High Reliability: Utilizes a vacuum arc quenching system for minimal wear and extended lifespan.
- Compact Design: Integrated mechanism and sealed pole ensure a space-efficient, dependable structure.
- Low Maintenance: Vacuum technology and durable construction reduce upkeep needs.

Applications of the VS1-12 Vacuum Circuit Breaker
The VS1-12 Vacuum Circuit Breaker excels in protecting electrical equipment where reliability is paramount. Its capability for frequent operations suits it for:
- Power Plants: Ensures stable power generation.
- Substations: Safeguards distribution networks.
- Industrial Facilities: Protects machinery and systems.
This vacuum circuit breaker interrupts fault currents and shields sensitive components, enhancing the safety and efficiency of electrical networks.

Advantages of the VS1-12 Vacuum Circuit Breaker
- Enhanced Safety: The vacuum arc quenching system disconnects circuits during overloads or short circuits, preventing equipment damage.
- Eco-Friendly: Unlike oil or gas-based breakers, this vacuum circuit breaker eliminates leakage risks and emissions, making it environmentally sustainable.
- Cost-Effective: Reduced wear from vacuum technology lowers maintenance frequency and operational costs.
- Versatile Compatibility: Works seamlessly with switchgear like KYN28A-12(GZS) and XGN series, adapting to various setups.
These benefits position the VS1-12 as a smart, sustainable choice for modern electrical systems.
Normal Operating Conditions for the VS1-12
To ensure optimal performance, the VS1-12 Vacuum Circuit Breaker operates under specific conditions:
- Ambient Temperature: -10°C to 40°C (storage down to -30°C).
- Altitude: Up to 1000m above sea level (adjustments required for higher altitudes).
- Humidity: Daily average ≤95%, daily vapor pressure ≥1.8 x 10⁻³ MPa.
- Seismic Intensity: Handles up to 8-degree seismic events.
- Environment: Free from fire hazards, explosions, severe pollution, chemical corrosion, or intense vibrations.
Adhering to these conditions maximizes the breaker’s longevity and effectiveness.
Conclusion
The VS1-12 Indoor High Voltage Vacuum Circuit Breaker stands out as a top-tier solution for electrical systems needing dependable protection. Its advanced vacuum arc quenching technology, minimal maintenance, and eco-friendly design make it perfect for industrial, power generation, and distribution applications. Offering high performance, versatility, and a long service life, the VS1-12 Vacuum Circuit Breaker ensures the safety and stability of electrical infrastructures.
For a reliable, efficient, and sustainable option, the VS1-12 is unmatched.