Community Tip - Visit the PTCooler (the community lounge) to get to know your fellow community members and check out some of Dale's Friday Humor posts! X
Most faults occur at a point on a line some distance from the substation bus. The current seen by a line protection system during a mid-line fault is typically much less than that for a bus fault, and varies in magnitude depending on the position of the fault relative to the end-point buses.