12kV VEF Vacuum Circuit Breaker (550mm Wide Panel)
The VEF-12 (VEF-12GD) indoor three-position vacuum circuit breaker is a side-mounted, integrated unit featuring embedded poles. Designed for 12kV, 50Hz three-phase AC indoor power distribution systems, it combines a vacuum circuit breaker, a disconnector, and an earthing switch into a single assembly, providing closing, isolating, and earthing functions. It utilizes an embedded pole structure and a comprehensive mechanical "five-protection" interlocking system. Compatible with 500mm-wide compact switchgear cabinets, it helps reduce the overall cost of the complete equipment set. The disconnector employs a rotary design, offering a clearly visible isolation gap after opening—allowing for intuitive confirmation of the power disconnection status and meeting safety requirements for maintenance.A range of rated current options is available.
Product Details
Feature
- High Integration: Integrates the circuit breaker, disconnector, and earthing switch into a single unit; compatible with 500mm narrow switchgear cabinets.
- Solid-Insulated Design: The vacuum interrupter is encapsulated in epoxy resin, protecting against dust, moisture, and condensation while ensuring high insulation reliability.
- Mechanical Interlocking: Features a forced interlock system with three-axis sequential operation, ensuring a specific interlocking sequence among the circuit breaker, disconnector, and earthing switch.
- Modular Mechanism: Modular mechanism design facilitates easy maintenance and replacement, offering excellent interchangeability.
- Live-Line Monitoring: Equipped with non-contact live-line indication sensors at the line terminals to monitor the circuit's live status in real-time.
Usage Condition
- Ambient temperature: -10°C to±40°C
- Relative humidity: Daily average ≤95%, monthly average ≤90%
- Poster height: Not exceeding 1000m
- Seismic intensity: Not exceeding 8 degrees
- Usage location: Free from explosion hazards, chemicals, severe vibrations, and pollution.
Technical Data
| NO |
Name |
Unit |
Data |
| 1 |
Rated Voltage |
kV |
12 |
| 2 |
Rated frequency |
Hz |
50 |
| 3 |
Rated current |
A |
630/1250 |
| 4 |
Rated short-circuit breaking current |
kA |
20/25/31.5 |
| 5 |
Operating voltage |
V |
48/110/220 |
| 6 |
Size |
mm |
1080×1020×400 |
| 7 |
Weight |
KG |
160 |
For custom product requests, please contact our sales staff for further discussion.
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