AND gates of the power levels for controlling said realized level combinations by controlling {HEAD ~ positions} of {TAIL ~ signal contacts} of the three phase contactors by means of said contactor position lines 
of
AND gates of the power levels for controlling said realized level combinations by controlling { HEAD ~ positions } of { TAIL ~ signal contacts } of the three phase contactors by means of said contactor position lines
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH