Wzonpa factory’s durable Medium Voltage Outdoor Vacuum Circuit Breaker designed for 12kV distribution networks. It integrates a vacuum interrupter with an intelligent control system to ensure stable switching, protection, and automation performance. Built for substations, industrial and mining power grids, and rural distribution systems, this Medium Voltage Outdoor Vacuum Circuit Breaker supports frequent switching operations while maintaining high operational stability under harsh environments.
Compact and lightweight structure – optimized for outdoor pole-mounted or substation installation with reduced space demand.
Maintenance-free vacuum interruption – minimizes operational cost and long-term servicing requirements.
Advanced protection functions – includes instantaneous, delayed, and overcurrent protection with configurable settings.
Intelligent recloser capability – supports automatic reclosing, sectionalizing, and SCADA integration.
Harsh environment resistance – stable operation under pollution, humidity, condensation, and strong wind loads.
Ambient temperature: -15°C to +40°C (storage -30°C)
Humidity: ≤95% daily, ≤90% monthly
Wind pressure: up to 700 Pa (34 m/s)
Altitude: ≤1000 m
Seismic intensity: ≤8 degrees
Suitable for non-corrosive, non-explosive environments
The Medium Voltage Outdoor Vacuum Circuit Breaker is widely applied in 10kV–12kV distribution automation systems, including urban and rural power grids, oil fields, mining zones, railway trunk lines, and industrial switching stations.
In modern grid upgrades, it is often used as a key terminal device for smart distribution networks requiring remote monitoring and automatic fault isolation.
Wzonpa applies strict production control aligned with international power equipment standards. Each Medium Voltage Outdoor Vacuum Circuit Breaker undergoes dielectric testing, mechanical endurance testing, and environmental simulation. Manufacturing is supported by precision assembly lines and multi-stage inspection to ensure consistent performance and long service life.
Technical consultation, installation guidance, spare parts supply, and remote troubleshooting support are available. You are welcome to contact us at any time for further information and a quotation.
| SN | Item | Unit | Parameters |
| 1 | Rated voltage | KV | 12 |
| 2 | Rated frequency | HZ | 50 |
| 3 | Rated current | A | 630 |
| 4 | Rated short-circuit breaking current | KA | 20 |
| 5 | Rated peak withstand current(peak) | KA | 50 |
| 6 | Rated short-time withstand current | KA | 20 |
| 7 | Rated short-circuit making current(peak) | KA | 50 |
| 8 | Mechanical lifespan | Times | 10000 |
| 9 | Rated short-circuit breaking current breaking times | Times | 30 |
| 10 | Power frequency withstand voltage(1min):(wet)(dry)phase to phase,ground/fracture | KV | 42/48 |
| 11 | Lightning impulse withstand voltage(peak)phase to phase,ground/fracture | KV | 75/85 |
| 12 | Secondary circuit 1-minute power frequency withstand voltage | KV | 2 |
Q1: Can it operate in harsh weather conditions?
A1: Yes, it is designed to withstand humidity, wind, pollution, and temperature variations.
Q2: Is it suitable for smart grid systems?
A2: Yes, it supports SCADA integration and automatic recloser functions.
Q3: What maintenance is required?
A3: The vacuum interrupter design significantly reduces maintenance needs, requiring only periodic inspection.
Q4: Where can it be installed?
A4: It is suitable for substations, industrial sites, rural grids, and infrastructure distribution lines.
Address
No. 58 Binhainan Fourth Road, Economic Development Zone, Yueqing City, Wenzhou City, Zhejiang Province, China
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