A three-phase fully-controlled bridge converter is connected to a 415 V supply, having a source resistance of 0.3Ω and inductance of 1.2 mH per phase. The converter is working in the inversion mode at a firing advance angle of 30 °. What is the average generator voltage for the condition: dc current I_d = 60A, thyristor drop = 1.5 V and f = 50 Hz?