Transformers with a rating of less than 500 kVA are referred to as what type of transformers?

Transformers with a rating of less than 500 kVA are typically referred to as distribution transformers. These transformers are mainly used in electrical distribution systems to step down voltage from higher transmission levels to lower levels that can be used by consumers. Their primary function is to supply power to end users, which often includes residential, commercial, and small industrial customers.

Distribution transformers are designed to handle the lower load requirements typically seen in these applications and are essential for delivering electricity safely and efficiently to final users. They generally have higher efficiency levels and lower losses compared to larger power transformers, which are used in higher voltage and higher capacity applications, such as generation or transmission substations.

While other types of transformers, such as step-up and step-down transformers, focus on changing voltage levels, the specific categorization of "distribution transformers" is based on their operational context and intended use within the electrical grid, particularly in providing localized service.