What is the primary function of a Network Protector?

• A. An electrical device used to protect and control the flow of electricity in a network with multiple power sources.
• B. A fuse that protects only a single feeder.
• C. A switch that increases voltage along the feeder.
• D. A device that monitors customer usage without interrupting service.

Answer: (A)

A network protector’s main job is to manage how power flows between two or more sources on a distribution network. It acts as a protective and switching device at the interface where different sources meet, automatically opening or closing paths to prevent backfeed, isolate faults, and keep the system stable when a source goes out or a fault occurs. This coordination helps prevent circulating currents and protects equipment, while allowing the rest of the network to continue supplying customers. It’s not simply a fuse for one feeder, not a device that increases voltage along the line, and not a meter that only monitors usage without interrupting service.