Transformers of 500 kVA and larger are classified as what type of transformers?

Transformers with a capacity of 500 kVA and larger are classified as power transformers. This classification is based on their designed purpose and operational characteristics. Power transformers are typically utilized in transmission systems and substation applications to manage high voltage levels and carry significant power loads.

These transformers are built to handle high voltages and are usually found in the utility sector, where they step up or step down voltage levels efficiently. They are distinct from distribution transformers, which usually operate at lower kVA ratings and are used to provide power to residential or commercial consumers at usable voltage levels.

Additionally, while some larger transformers can function as step-up transformers—raising voltage levels for transmission—the term "power transformers" encompasses a broader range of functionalities, including their ability to step down voltages. Single-phase transformers, on the other hand, are generally smaller and used in less complex applications, further differentiating them from the classification of power transformers.