What does a "feeder" in electrical distribution do?

A "feeder" in electrical distribution plays a crucial role in the transmission of electricity over a network. It is responsible for distributing electricity from substations to transformers. This process involves transferring high-voltage electricity from a substation, where it is stepped down for distribution, to distribution transformers that further reduce the voltage for safe delivery to residences and businesses.

This function is essential because it ensures that power is efficiently delivered over long distances and that it can be utilized effectively at lower voltages closer to end users. Feeder lines often carry a significant load of power and are designed to handle the electricity demand of multiple localities, making them integral to the infrastructure of electrical distribution systems.

In contrast, the other choices describe different components or functions in electrical systems that do not pertain to the primary role of a feeder. Connecting batteries relates to storage systems, protective devices refer to systems like circuit breakers or fuses, and measuring electrical power is the function of metering devices. Thus, the role of a feeder is specifically tied to the distribution of electricity within the power network.