Wzonpa, a professional factory and supplier in China, provides the 11KV MV VCB Outdoor Vacuum Circuit Breaker, a high-performance outdoor vacuum circuit breaker engineered for modern power systems. This device is specifically designed to safely interrupt and control load, no-load, and short-circuit currents in 10KV-12KV networks, making it suitable for urban power grids, rural distribution, and small power systems. The 11KV MV VCB Outdoor Vacuum Circuit Breaker combines compact design, robust materials, and advanced operating mechanisms to deliver reliable performance even in harsh environmental conditions.
1.Three-phase common box with conduit inlet/outlet and dry air filling for safe and durable operation.
2.Electric spring operating mechanism, ensuring rapid, reliable switching under extreme weather.
3.Vacuum interrupter with ceramic shell and cup-shaped longitudinal magnetic field contact, featuring copper-chromium contact material for superior short-circuit breaking and closing capabilities.
4.Compact and lightweight design, with aesthetically refined appearance.
5.Adaptable insulation support sleeves and arc extinguishing chamber, engineered to withstand polluted environments and severe weather.
The 11KV MV VCB Outdoor Vacuum Circuit Breaker for industrial substations operates by extinguishing arcs in a vacuum environment. During overload or short-circuit faults, the contacts separate, forming a brief arc that is instantly quenched due to the high dielectric strength of the vacuum. This rapid arc extinction protects electrical equipment and ensures uninterrupted system stability, making the breaker highly reliable and safe for various applications.
Urban 10KV–12KV power distribution networks
Rural and small power grid systems
Industrial substations and outdoor switchgear installations
Tap changer applications for distributed power networks
The 11KV MV VCB Outdoor Vacuum Circuit Breaker is designed to operate reliably under specific environmental conditions, ensuring optimal performance and longevity:
Ambient temperature: -15℃ to +40℃ (+5℉ to +104℉); storage and transportation allowed down to -30℃ (-22℉).
Relative humidity: Daily average ≤95%; monthly average ≤90%, preventing condensation-related failures.
Altitude: Suitable for installations up to 1000 meters above sea level.
Seismic resistance: Can withstand earthquakes up to 8 degrees intensity.
Wind speed tolerance: Safe operation in winds up to 34 m/s (equivalent to 700 Pa).
Installation environment: Must be installed in areas free from explosion hazards, corrosive chemicals, and severe vibration.
Certified and tested to meet IEC standards for medium-voltage equipment.
Durable materials and advanced vacuum interrupters ensure long-term reliability.
Compact and weather-resistant design reduces maintenance costs and downtime.
Compared to competitors, Wzonpa’s 11KV MV VCB Outdoor Vacuum Circuit Breaker offers higher breaking capacity, superior insulation, and more robust mechanical life.
| Rated voltage | 12KV |
| Rated current | 630A |
| Power frequency withstand voltage | 42KV/48KV |
| Lightning impulse withstand voltage(peak value) | 75KV/85KV |
| Rated short-circuit breaking current (effective value) | 20KA |
| Rated short-circuit closing current (peak) | 50KA |
| Rated operating sequence | O-0.3s-CO-180s-CO |
| Rated short-circuit current breaking times | 30 times |
| Mechanical lifespan | 10000 times |
| Rated operating voltage (closing/opening coil) | DC220V AC220V |
| Allowable wear thickness for dynamic and static contacts | 3mm |
| Isolation fracture distance | >200mm |
Q1: What is the primary function of the 11KV MV VCB Outdoor Vacuum Circuit Breaker?
A1: It safely interrupts and isolates load, no-load, and short-circuit currents in 10–12KV power systems, protecting equipment and personnel.
Q2: Can the breaker operate in harsh environments?
A2: Yes, it features a weatherproof design with insulation sleeves and dry-air-filled boxes suitable for extreme temperatures, humidity, and polluted conditions.
Q3: How long is the mechanical lifespan of it?
A3: The breaker is rated for 10,000 mechanical operations, ensuring long-term reliability.
Q4: What makes Wzonpa’s 11KV MV VCB Outdoor Vacuum Circuit Breaker superior to other brands?
A4: It uses advanced ceramic vacuum interrupters, copper-chromium contacts, and an electric spring operating mechanism, offering higher breaking capacity, faster arc extinction, and enhanced durability.
Q5: Can this breaker be used in rural power grids?
A5: Absolutely. It is designed for both urban and rural applications, including tap changer functionality for small-scale distribution systems.
Q6: What are the installation limitations?
A6: Suitable for altitudes ≤1000m, ambient temperatures -15℃ to +40℃, wind speeds ≤34 m/s, and areas without explosion hazards or severe chemical exposure.
Q7: Is this product customizable?
A7: Yes, Wzonpa, as a leading manufacturer and supplier in China, can provide tailored specifications to meet project-specific requirements.
Contact Wzonpa for a quote or customized specifications today!
Address
No. 58 Binhainan Fourth Road, Economic Development Zone, Yueqing City, Wenzhou City, Zhejiang Province, China
Tel
