A transformer rated at more than 500kVA is classified as which type of transformer?

A transformer rated at more than 500 kVA is classified as a power transformer. Power transformers are designed to handle large amounts of electricity and are typically used in transmission networks and substations to step up or step down voltage levels for efficient power transfer over long distances. These transformers are essential in managing the electricity supply from generation sources to end-users.

Power transformers operate at high efficiencies and are built to handle higher voltage and current levels compared to smaller transformers used in residential or commercial applications. They play a crucial role in the overall electrical grid infrastructure, enabling reliable distribution of electrical energy.

In contrast, step-down transformers primarily lower voltages for local distribution, while isolation transformers are designed to separate circuits for safety and performance rather than for voltage conversion. Distribution transformers, typically rated below 500 kVA, are used to provide lower voltage levels to consumers but do not exceed the higher capacities found in power transformers. Thus, the classification of a transformer exceeding 500 kVA correctly aligns with the definition and function of a power transformer.