VZD 12KV Three-Position Compact And Flexible Vacuum Circuit Breaker

The VZD 12kV three-position vacuum circuit breaker integrates isolation, grounding, and interrupting functions, utilizes vacuum arc extinguishing technology, and features a compact design and easy operation. It supports both electric and manual control, features mechanical interlock protection, and is suitable for fixed or removable installation. Its high interrupting capacity, long life, and maintenance-free design make it suitable for substations, industrial and mining applications, and smart grids, enhancing power distribution reliability.

Product Technical Features
1. Compact/Flexible:
The air-based insulation method meets the electrical clearance and partial discharge standards of the power industry's technical specifications.
The compact cabinet dimensions (standard cabinet dimensions: 480*1000*1800mm (width x depth x height)) make the complete power distribution system extremely compact, saving space on expensive urban construction land.
Flexible busbar configurations and expansion options facilitate integration with other cabinet types.
2. Integrated/Encapsulated:
The integrated circuit breaker combination design integrates a disconnector, circuit breaker, earthing switch, and live sensor. The modular design provides simple, reliable interlocking and easy maintenance.
3. Visualization/High Efficiency:
The visual disconnector breakout design, rapid delivery, and overall modular design make assembly of the complete electrical system quick and easy.
The integrated structure allows all types of closing requirements to be implemented within a single unit, reducing the risk of locking failures caused by assembly process issues in the complete electrical system. 4. Stability/Durability:
Optional spring permanent magnet mechanism provides long mechanical life. The sealed vacuum interrupter provides dustproof and high insulation performance.

Product Technical Parameters
Rated voltage: 12kV
1-minute power frequency withstand voltage: 42kV
Lightning impulse withstand voltage: 75/85kV
Rated current: 630- 1250A (feeder)
Rated frequency: 50/60Hz
Rated short-circuit breaking current: 25kA/31.5kA
Rated short-time withstand current: 25kA/31.5kA
Rated peak withstand current: 50kA/63kA
Rated short-circuit current breaking cycles: 30
Mechanical life: 10,000 cycles (circuit breaker)
Power frequency withstand voltage for auxiliary circuits: 2000V
630-1250A (incoming line)
3,000 cycles (disconnector/earthing switch)
100,000 cycles (circuit breaker)

Applicable fixed switchgear structure:
The cabinet is constructed of 2.0mm aluminum-zinc coated steel sheets bent and assembled for high strength, light weight, and excellent corrosion resistance. It is divided into independent low-voltage compartments, busbar compartments, switch compartments, and cable compartments.