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