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