what is a 3 phase transformer used for?

A 3-phase transformer is used to efficiently step up or step down voltage levels in three-phase electrical systems, which are commonly found in industrial and commercial applications. It allows for the transmission of electrical power over long distances with reduced losses. Additionally, 3-phase transformers help balance loads, improve system reliability, and enable the integration of renewable energy sources into the grid. Their design supports higher power capacities compared to single-phase transformers.