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