{HEAD ~ a protective relay} for producing {TAIL ~ a breaker opening command} when a fault occurs on a load side of the breaker 
for producing
{ HEAD ~ a protective relay } for producing { TAIL ~ a breaker opening command } when a fault occurs on a load side of the breaker
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH