Vacuum circuit breakers for substations play multiple important roles in power systems, as follows:
1. Core functions
- Current breaking capacity
Vacuum circuit breakers are mainly used in 3~10kV three-phase AC systems, which can break load current, overload current and short-circuit current to ensure safe and stable operation of the power grid. Its arc extinguishing principle is based on the high insulation of the vacuum environment, which can quickly extinguish the arc, avoid reignition, and improve system stability.
- Insulation and protection function
Normal operation: When closing the circuit breaker, the support insulator maintains insulation to the ground, and when a fault occurs, the vacuum arc extinguishing chamber is used to isolate the fault point.
Fault protection: Automatically trip when a permanent ground fault is detected, isolate the fault line, and prevent the fault from expanding.
2. Key advantages
- Oil-free design
The vacuum medium is used instead of the traditional oil medium to reduce maintenance costs and environmental pollution, which is suitable for industrial and mining enterprises and other scenarios with high environmental protection requirements.
Less maintenance characteristics
Simple structure, long mechanical life (such as the contact opening distance of the 10kV model is only 10mm), reducing maintenance frequency and power outage risks.
- Frequent operation adaptability
Suitable for scenarios such as substation switching operation and frequent start and stop of industrial enterprise equipment. The operating mechanism adopts electric or pneumatic control to achieve remote operation.
3. Application scenarios
Substation core equipment protection: As an indoor power distribution device, it is configured in a central cabinet, double-layer cabinet or fixed cabinet to protect high-voltage electrical equipment.
Special environment application: Meet the requirements of oil-free and less maintenance, especially suitable for high-frequency operation environments such as hydropower stations.
4. Other functions
Sealing and safety: The metal shell and good sealing design prevent leakage, and the insulating bracket isolates circuits of different polarities.
Deflation device: Real-time monitoring of vacuum degree to ensure breaking performance.
In summary
vacuum circuit breakers for substations have become indispensable protection and control equipment in modern power systems through efficient breaking, reliable insulation and low maintenance characteristics.
Contact: Ms.Lisa (Director of Sales Department)
Tel: +86 0917 3661109 Fax: +86 0917 6739416
Mobile: +86 18091767067(WhatsApp/Wechat)
Email: xdtz02@westpowerelectric.com
Website:www.xdtzelectrical.com
Add: Nanpo Village, Chencang Avenue Jintai District Baoji City, Shaanxi Province, China.
