The actual impedance of the power line may then be compared with {HEAD ~ the initial impedance profile} and it is possible to ascertain whether a fault exists on {TAIL ~ the power line} 
The actual impedance of the power line may then be compared with { HEAD ~ the initial impedance profile } and it is possible to ascertain whether a fault exists on { TAIL ~ the power line }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL