Single-Phase 10 kVA / 50 kVA Oil-Immersed Transformers, 10kv/0.48kv Pole-Mounted Type

For very small, low-power loads (e.g control circuits, lighting), this is acceptable. For any significant load (typically>5% of the panel's capacity), this will cause the dangerous load iunbalanced discussed earlier. A dedicated transformer isthe only professional solution for high-power single-phase equipment.

They solve opposite problems. A 3-to-1-phase transfommer takes three phase power and creates single-phase power. A phase converter (rotary or static) takes single-phase power and generatest a third phase to run a three-phase motor.They are not interchangeable

Modern dry-type transformers are highly efficient, typically in the range of 95% to 98.5% at full load. Efficiency dropsslightly at very light loads. The choice of copper vs. aluminum windings also impacts efficiency, with copper beingsuperior.