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