When both the first and second connection changing switches are closed, the interconnection of the stator windings becomes {TAIL ~ a parallel Y connection} in which {HEAD ~ the phase difference} produced is 60° 
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When both the first and second connection changing switches are closed , the interconnection of the stator windings becomes { TAIL ~ a parallel Y connection } in which { HEAD ~ the phase difference } produced is 60 °
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL REL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH