A synchronous electrical machine comprises {HEAD ~ a plurality} of {TAIL ~ phases} and detecting means arranged to detect an open circuit fault in at least one of the phases of the synchronous electrical machine 
of
A synchronous electrical machine comprises { HEAD ~ a plurality } of { TAIL ~ phases } and detecting means arranged to detect an open circuit fault in at least one of the phases of the synchronous electrical machine
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH