2.30 Two identical 250 kVA, 230/460 V transformers are connected in open delta to supply a balanced 30 load at 460 V and a power factor of 0.8 lagging. Determine (a) The maximum secondary line current without overloading the transformers. (b) The real power delivered by each transformer. (c) The primary line currents. (d) If a similar transformer is now added to complete the A, find the percentage increase in real power that can be supplied. Assume that the load voltage and power factor remain unchanged at 460 V and 0.8 lagging, respectively.