Design, construction, and test of a phasing transformer . 17 The voltage relation* ir t) :. aslng transfor r ma ?•* ?• le v o * . j- . lJn figure 4 let a, ><, and c vector* ... ?-??), ? d c .•« plotted between the three phase volt-age vaJues *-ovl electrisal degrees r v< rsivoltage c we ol I relation nhown in: ere c is versed voltage. /r inthe vectorial repres ntation the a plltu Li 1b in-sert to a by varying the n i b »r i turns on th^.8ec« nrtary. 18. Voltages b and c are then ] laced in series and thetwo phase -voltage relations are obtained as

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