Faster interruption of circuit breakers in the transmissionvoltage offers significant advantage to the transmission system.
断路器在输电电压下的快速开断对输电系统是明显有利的。
2
In 1949, the largest thermal power unit of China was 10 MW and the highest transmissionvoltage was 220 kV, all designed and made by foreign countries.
1949年我国火电最大机组为1万千瓦，输电电压等级最高为220千伏，且全部为外国设计制造。
3
With the expansion of power grid and the increase of the transmissionvoltage grade, the status of relay protection in power system is becoming more and more important.