Current limiting operation may be diagnosed and indicated when {HEAD ~ the sensor response} indicates {TAIL ~ an insensitivity} to the perturbation 
indicates
Current limiting operation may be diagnosed and indicated when { HEAD ~ the sensor response } indicates { TAIL ~ an insensitivity } to the perturbation
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH