How wave trap trip the lines in any fault condition?
I presume you are asking about the application of ‘power line carrier’ for protection of power lines. Power line carrier is a scheme whereby a radio frequency signal is coupled onto the power line. This signal is constrained to exist within a segment of the power line by means of blocking filters, known as ‘wave traps’ located at the ends of the line. There are several ways that a power line carrier scheme can work. The simplest is a scheme in which a protective device (a ‘relay’) is placed at each end of the line and set up to detect a fault in the line. That relay could be as simple as a device that measures only the direction of flow of fault current. Let’s assume that you have a line that transports power between two points, one in the north and one in the south. If the relay at the north end of the line sees fault current flowing into the line, that means that there is a fault somewhere to the south. If the relay at the south end of the line sees fault current flowing into the lin
