Two identical single phase transformers are connected in V$-$V connection across three

phase mains and deliver a balanced load of $3048$ kW at $11$kV$,0\mathrm{.}8$ p$.$f$.$ Lagging.

a$)$ Calculate the line and phase currents and the pf at which each transformer is

working.

b$)$ The V$-$V connection is converted to mesh$/$mesh by the addition of an identical

unit. Calculate the additional load of the same pf that can now be supplied for the

same temp rise. Also calculate the phase and line currents