Understanding the Basics of Dry type transformer Capacity Selection

When selecting a Dry type transformer from manufacturer, it is important to understand the basics of capacity selection. The capacity of a transformer is determined by the amount of power it can handle. This is measured in kilovolt-amperes (kVA). The capacity of a transformer must be sufficient to meet the load requirements of the system it is powering.

When selecting a transformer, the first step is to determine the total load of the system. This includes the total power requirements of all the equipment connected to the transformer. Once the total load is known, the transformer capacity can be determined. The transformer capacity should be at least equal to the total load, but it is recommended to select a transformer with a capacity that is slightly higher than the total load. This will ensure that the transformer can handle any additional load that may be added in the future. Usually, it is about 20% higher for reference, but it will finally determine by the usage. 

The next step is to determine the voltage requirements of the system. The voltage of the transformer must match the voltage of the system. If the voltage of the transformer is too low, it will not be able to provide enough power to the system. If the voltage of the transformer is too high, it can cause damage to the system.

Finally, the transformer must be sized to meet the system’s short-circuit current requirements. The short-circuit current is the maximum amount of current that can flow through the transformer in the event of a short circuit. The transformer must be able to handle this amount of current without damage.

By understanding the basics of capacity selection, it is possible to select a Dry type transformer that is suitable for the system. It is important to ensure that the transformer has a capacity that is equal to or greater than the total load, the correct voltage, and is able to handle the short-circuit current requirements.