How is the burden of a current transformer measured?

The burden of a current transformer is measured in ohms. This is because the burden refers to the load that is connected to the secondary winding of the transformer, and this load is often expressed in terms of resistance. In practical applications, it includes the impedance that the transformer is driving, which consists of both resistive and reactive components, but resistance in ohms is a fundamental aspect of it.

Understanding the load as a resistive measurement is crucial for ensuring that the current transformer operates within specified limits, maintaining accuracy in measurements and preventing saturation, which can compromise performance. The other measurement units listed, such as milliamperes, watts, and farads, pertain to different electrical properties and are not applicable to measuring the burden directly. Milliamperes relate to current, watts to power, and farads to capacitance, none of which directly describe the load in the context of a current transformer's burden.