ZN6(VS1) Lateral Fixed Vacuum Circuit Breaker – Technical Description The ZN6(VS1) Lateral Fixed Vacuum Circuit Breaker is a medium-voltage switching device designed for reliable operation in power distribution systems. It integrates advanced vacuum interrupter technology with a robust mechanical structure, ensuring high performance in interrupting fault currents and maintaining system stability. Design and Construction The breaker features a compact, lateral fixed design, optimized for easy installation and maintenance in switchgear panels. Its primary components include: 1. Vacuum Interrupter: The core interrupting unit employs a vacuum arc-quenching chamber, which ensures minimal contact erosion and long service life. The vacuum environment (typically below 10⁻⁴ Pa) enables efficient arc extinction during current interruption. 2. Fixed Contacts: The stationary and moving contacts are made of high-quality copper-chromium alloy, providing excellent electrical conductivity and resistance to welding under high currents. 3. Insulation System: Epoxy resin-encapsulated poles and high-grade insulating materials ensure dielectric strength and resistance to environmental contaminants. 4. Operating Mechanism: A spring-operated mechanism ensures fast, reliable opening and closing actions, with mechanical endurance exceeding 10,000 operations. Technical Specifications - Rated Voltage: 12 kV - Rated Current: 630 A to 3150 A (depending on configuration) - Short-Circuit Breaking Capacity: Up to 40 kA - Mechanical Life: ≥10,000 operations - Electrical Life: ≥100 operations at full short-circuit current Key Features 1. High Reliability: The vacuum interrupter eliminates the risk of gas leakage or dielectric degradation, ensuring consistent performance. 2. Low Maintenance: Minimal moving parts and sealed contacts reduce wear and maintenance requirements. 3. Safety: Integrated grounding switches and mechanical interlocks prevent unauthorized or unsafe operations. 4. Environmental Resistance: Suitable for harsh conditions, including high humidity, dust, and temperature variations (-30°C to +40°C). Applications The ZN6(VS1) is widely used in: - Industrial power distribution networks - Substations and renewable energy systems - Mining and infrastructure projects Conclusion With its robust construction, high breaking capacity, and maintenance-free design, the ZN6(VS1) Lateral Fixed Vacuum Circuit Breaker is an efficient solution for modern medium-voltage power systems, ensuring operational safety and grid reliability. (Word count: 500)