{HEAD ~ Isolating means} is arranged to isolate {TAIL ~ the at least one phase} of the synchronous electrical machine with the fault 
is arranged to isolate
{ HEAD ~ Isolating means } is arranged to isolate { TAIL ~ the at least one phase } of the synchronous electrical machine with the fault
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH