Three identical single-phase transformers each rated at 100 kVA, 7 kV/3.5 kV are joined together as a three phase transformer bank. The high voltage sides are connected in delta and the low voltage sides are connected in wye. A three phase wye-connected load of 200 kW and 50 kVAr is connected across the secondary winding. Compute the following: (i) Ratio of the line voltages for the three phase transformer bank (ii) The three phase line currents in both the delta and wye connections Note: The given voltage ratio is stated to be for the single phase transformers. Hence, the ratio of line voltages for the three phase transformer bank will not be the same.

Answer rating: 100% (QA)

Solution Line voltage in primery side 7KV Line voltage in secondary side 173235 ... View the full answer