The contact system of vacuum circuit breaker is one of the key factors of its reliability, mainly from the following aspects to ensure the reliability of the switch:
1.Good electrical conductivity: The contact material needs to have good electrical conductivity to ensure that the current can be effectively conducted during the process of circuit splitting and closing.
2.Reliable breaking of large currents : The contact system must be able to withstand and reliably break large currents, to avoid excessive temperature and pressure when the current is cut off, thus affecting the life and performance of the circuit breaker.
3.Good arc resistance and thermal stability: When the contact cuts off the current, it will generate an arc, so the contact material needs to have good arc resistance and thermal stability to withstand the high temperature of the arc and quickly return to its original state.
4.Appropriate contact pressure: The contact pressure between the contacts needs to be moderate to ensure that there is good electrical contact between the static and dynamic contacts. Too little contact pressure may lead to poor contact, too much contact pressure may increase mechanical wear.
5.Reasonable opening distance design: The opening distance of the contacts needs to be designed according to the rated voltage and voltage resistance requirements of the circuit breaker, not only to ensure sufficient voltage resistance level, but also to avoid affecting the bellows life of the vacuum interrupter chamber due to excessive opening distance.
6.Use of high-quality materials: The contact system should be made of high-strength, high-insulation materials to withstand the mechanical and electrical stresses in the switching process.
7.Advanced processing technology: Adopt advanced processing technology to manufacture the contacts, ensure the precision and surface quality of the parts, and avoid poor contact and arc re-ignition caused by processing defects.
8.Regular inspection and maintenance ： Regular inspection and maintenance of vacuum circuit breaker, timely detection and treatment of problems, such as contact wear, poor contact, etc., to ensure its long-term stable operation.
In Summry:
Through the above measures, the reliability of the vacuum circuit breaker contact system can be effectively improved, thus ensuring the reliability of the switch and the safe operation of the power system.
Contact: Ms.Lisa (Director of Sales Department)
Tel: +86 0917 3661109 Fax: +86 0917 6739416
Mobile: +86 18091767067(WhatsApp/Wechat/Telegram)
Skype: nana00158
Email: xdtz02@westpowerelectric.com
Website:www.tongzhongdianqi.com
Add: Nanpo Village, Chencang Avenue Jintai District Baoji City, Shaanxi Province, China.
