Are fault currents in substations typically larger or smaller than at remote worksites?

Fault currents in substations are typically larger than those at remote worksites, making the correct answer larger. Substations are crucial components of electrical power systems and are designed to handle high voltage and high current levels, particularly during fault conditions. The configuration of substations, with their closeness to generation sources and the presence of large transformers and circuit breakers, contributes to the ability to generate higher fault currents.

In contrast, remote worksites often operate on lower voltage distribution systems, and factors such as distance from the power source can lead to lower fault levels. The resistance and impedance in the electrical pathway from the substation to the remote site also affect the maximum fault current that can be expected.

The nature of fault currents – being dependent on the fault location, system configuration, and the elements involved – implies that while they may vary under specific severe conditions, in general, the fault currents at substations are significantly larger when compared to those at more distant worksites.