Abstract This article describes a new type of three-phase inconsistent protection control loop. The new type of protection control loop not only increases the number of relays and contacts but also changes the original topology. When compares with the traditional loop, it is easy to age the existing devices, and the reliability of the time relay is not high enough. This new circuit has low device dependency, better anti-aging performance, and higher reliability. At the same time, a simple discussion and analysis are made on the problems that the time relays which encountered in the grid such as the complicated steps and the necessity of power interruption.
Bai Wenjian,Cen Rongjia. New control circuit of three-phase inconsistent protection for circuit breaker[J]. Electrical Engineering, 2019, 20(1): 73-76.
2019, Vol. 20 
