Apparatus for interrupting supply of power from power system to portion of consumer load in response to {HEAD ~ control signal} from {TAIL ~ power system} 
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Apparatus for interrupting supply of power from power system to portion of consumer load in response to { HEAD ~ control signal } from { TAIL ~ power system }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL