Three single-phase transformers are connected to form a delta-star three-phase transformer of $110$ kV/ $11$ kV. The transformer supplies at $11$ kV a load of $8$ MW at $0.8$ p.f. lagging to a nearby plant. Neglect the transformer losses. The ratio of phase currents in delta side to star side is
- $1 : 10\sqrt{3}$
- $10\sqrt{3} : 1$
- $1 : 10$
- $\sqrt{3} : 10$