The main reason for using vacuum circuit breakers (VCB, Vacuum Circuit Breaker) in high-voltage lines is its excellent arc extinguishing performance, high reliability and ability to adapt to high-voltage environments. The following is a specific analysis:
1. Reliability and long life
Maintenance-free: vacuum interrupter sealed design, no media aging problems (such as oil degradation or SF₆ leakage), the mechanical life of up to tens of thousands of times, much higher than traditional circuit breakers.
Environmentally friendly: no oil or greenhouse gas emissions, in line with environmental requirements.
2. Excellent arc extinguishing ability
High insulation strength of vacuum medium: under vacuum environment (air pressure lower than 10-⁴ Pa), there are very few gas molecules, and the charged particles generated by the arc are Difficult to diffuse, the arc gap medium recovery speed is very fast, can quickly cut off the fault current in the high-voltage line.
No re-ignition risk: compared with oil circuit breakers or SF₆ circuit breakers, the arc of vacuum circuit breakers is not easy to re-ignite after the current passes through zero, which is especially suitable for frequent operation and high breaking demand scenarios (e.g., power distribution networks).
3. Fast response and automation compatibility
Short tripping time: (usually <50ms), it can quickly remove short-circuit faults and protect grid equipment.
Compatible with smart grid: supports remote monitoring and automation operation, meeting the intelligent demand of high-voltage lines.
4. Economy
Low total cost: although the cost of a single vacuum circuit breaker may be high, the full life cycle cost is better than that of oil or SF₆ circuit breakers.
5. High voltage ratings: Modern vacuum circuit breakers can be designed to cover the medium to high voltage range from 10kV to 40.5kV (some up to 72.5kV), and the voltage can be further increased through multi-break tandem connection or special construction. Compact design.
Compact design: The small size of the vacuum interrupter chamber is suitable for the modular layout of high-voltage switchgear, which reduces the footprint of the equipment.
VTZ-12T Vacuum Circuit Breaker For Underground High Explosive Cabinet In Mines by Shaanxi West Power Tongzhong Electrical Co., Ltd. is a special vacuum circuit breaker for underground mining with rated voltage of 12kV and AC 50/60Hz. It adopts modular operating mechanism, and the mechanical manual closing and opening interfaces are led out from the top, which is convenient for users to use. It is suitable for various places with explosion-proof requirements for power facilities. The trolley unit is used in conjunction with the PJG-10 switchgear, and can also be used for new combined high explosive switchgear; this product focuses on adding the right-side output control shaft, which can perform closing, opening and manual energy storage operations on the right side of the circuit breaker, which is convenient for the switchgear to be connected with the circuit breaker trolley, and manual closing, opening and energy storage operations can be realized on the outside of the cabinet.
VTZ-12T vacuum circuit breaker for underground high explosive cabinet in mines has many advantages:
1.Safety and reliability
the circuit breaker utilizes a combination of permanent magnet operation mechanism and spring operation mechanism. In normal operation, the permanent magnet mechanism is used. In the event of a fault in the permanent magnet mechanism, the breaker can still be manually closed and opened, ensuring safe and reliable operation. The breaker, when paired with the switchgear, achieves a reliable mechanical interlock, ensuring the safety of operating personnel.
2.High conductivity performance
it features a rationally designed conductive circuit, ensuring that it meets the temperature rise requirements of 1.1 times the rated current.
Intelligent configuration
a. A self-powered wireless temperature monitoring system can be added, providing a safe, maintenance-free solution.
b. Mechanical characteristics monitoring program can continuously monitors the breaker's operational data, enabling early detection and resolution of potential issues.
c. A motorized cabinet insertion design allows for remote operation, ensuring personnel safety.
d. Partial discharge detection allows real-time detection of component aging.
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Shaanxi West Power Tongzhong Electrical Co., Ltd.
Contact: Ms.Grace Liu (Director of Sales Department)
Email:xdtz04@westpowerelectric.com
Tel: +86 917 3661109 Fax: +86 917 6739416
Mobile: +86 18091765882(WhatsApp/Wechat/skype )
Website:https://www.xdtzelectrical.com
Add: Nanpo Village, Chencang Avenue Jintai District Baoji City, Shaanxi Province, China.
