The transformers typically used in three-phase systems are composed of which type of transformer?

In three-phase systems, the transformers that are typically used are three-phase transformers. These types of transformers are specifically designed to handle the unique characteristics and requirements of three-phase power distribution systems.

Three-phase transformers can consist of three single-phase transformers connected together (forming a bank), or they can be a single unit designed to efficiently manage the three-phase power. Using three-phase transformers provides several advantages, including better efficiency, smoother power delivery, and reduced losses compared to using multiple single-phase transformers alone.

Understanding this, it is clear that the choice of a three-phase transformer is appropriate for three-phase systems, whereas other options such as single-phase, multi-phase, or dual-phase transformers wouldn't cater to the specific needs and benefits of a three-phase system. Single-phase transformers, for instance, are used for two-phase or single-phase applications and do not adequately support the power requirements found in three-phase systems.