Chapter 3, Problem 3.37P

Three single-phase two-winding transformers, each rated $\text{25MVA},\text{54}.\text{2}/\text{5}.\text{42}\text{kV},$ are connected to form a three-phase $\text{Y-Δ}$ bank with a balanced Y-connected resistive load of $\text{0}\text{.6}\Omega$ per phase on the low-voltage side. By choosing a base of 75 MVA (three phase) and 94 kV (line-to-line) for the high-voltage side of the transformer bank, specify the base quantities for the low-voltage side. Determine the per-unit resistance of the load on the base for the low-voltage side. Then determine the load resistance ${\text{R}}_{\text{L}}$ in ohms referred to the high-voltage side and the per-unit value of this load resistance on the chosen base.