A bank of transformers is rated based on which of the following criteria?

Transformers are rated primarily based on their kVA (kilovolt-amps) capacity, which indicates the amount of power they can handle continuously without overheating. The kVA rating is significant because it helps determine the appropriate transformer for a specific application, ensuring that the transformer can handle the load requirements of the electrical system it serves.

Choosing a transformer with the correct kVA capacity is crucial for optimal system performance and efficiency. If the transformer is undersized (lower kVA rating), it may overheat and fail under high load conditions. On the other hand, an oversized transformer may be less efficient and more costly than necessary for the application.

While physical size, voltage rating, and noise level may affect a transformer's selection and installation, they are not the primary criteria under which transformers are rated. The kVA capacity provides a clear and standardized measure for evaluating and comparing transformers in relation to their intended electrical loads.