In which unit are transformers typically measured?

Transformers are typically measured in kVA (kilovolt-amperes) because this unit takes into account both the voltage and current flowing through the transformer without factoring in power factor. Transformers are used to transfer electrical energy between circuits, and their ability to handle power is directly related to these two aspects. The kVA rating indicates the maximum load that the transformer can handle safely without overheating and without considering the phase angle between voltage and current, which is crucial since the actual power delivered can vary based on the characteristics of the connected load.

Using kVA instead of watts allows for a clear understanding of the transformer's capacity as it relates to both resistive and reactive loads. This distinction is particularly important in AC systems, where the power factor can greatly influence the actual wattage consumed. By focusing on kVA, engineers can ensure that the transformer is suitable for a variety of load types without having to specify the power factor for each scenario.