When you select a power transformer, you need take some essential factors into consideration, such as its working principle. Different countries have different standards. United States and Canada run on 110/120 volts and other parts of the world runs on 220/240 volts. Usually industrial plants use 440 to 480 volts.
Choose the powertransformer based on the load type and try to use few transformers as possible in order to effectively reduce voltage drop. Once you determine the load size and nature of the load, then choosing a transformer is quite easy.
Before selecting a power transformer, determine the primary voltage and frequency, the secondary voltage and the capacity required. Once you have determined the maximum load you can expect, you can select the power transformer based on that. Choose a transformer with higher voltage and smaller amperage so that the loss due to resistance is less.
Determine the size of your power transformer based on the maximum load you can expect. You must decide the size of the transformer based on the size of the generating units used.
You must consult with a manufacturer in order to choose the right power transformer for your application, based on these factors, for example, operating condition, available transporting facility, cooling methods, impedance, and insulating level.
When choosing transformer, you must consider the appropriate standards and references, and must compulsorily work with your manufacturer before deciding the power transformer for your application. By choosing the right power transformer for your application, you can reduce the transmission losses and the transmission cost by a significant amount.