Vacuum Circuit Breakers play an important role in the protection and control of electrical circuits in substations. With the use of vacuum technology in VCBs, overloads and short circuits can be mitigated quickly, thus reducing damages. These VCBs, with their modern architecture and compact design, low maintenance requirements, and reliability, are fit for modern substations. These do not consume much space which is an important consideration in modern substations. With more than 3 decades of R and D, Zhejiang Greenpower Electric Co. Ltd performs R and D for VCBs which are considered to be world class, outperforming the best in VCBs in regards to safety and performance.