What are the standard sizes of oil-filled transformers?

The standard sizes of oil-filled transformers vary depending on their application, with common ratings typically ranging from 25 kVA to several hundred MVA. For distribution transformers, you’ll often find standard ratings such as 75 kVA, 150 kVA, 300 kVA, and 500 kVA. For larger power transformers, sizes can go beyond 100 MVA, including ratings like 150 MVA, 300 MVA, and up to 500 MVA or even higher. It’s important to note that oil-filled transformer ratings are determined by design specifications and the intended use, considering factors like efficiency, regulatory compliance, and thermal management. The right ratings ensure optimal performance and reliability in various industrial applications.