What device is used to control the connection of electrical loads to prevent system overload?

The optimal choice for controlling the connection of electrical loads and preventing system overload is a circuit breaker. A circuit breaker serves as an automatic protection device that interrupts electrical flow in the event of an overload or short circuit, thereby safeguarding the electrical system from potential damage.

When electrical loads exceed a predetermined level, the circuit breaker will trip, breaking the circuit and stopping the flow of electricity. This action prevents overheating of wires and potential fire hazards that can occur from excessive current. Additionally, circuit breakers can be manually reset once the issue is identified and resolved, making them an essential component for maintaining safety in electrical systems.

While other devices, like load monitors, can help track and gauge the performance of electrical loads, they do not provide the direct protection that a circuit breaker does. Load sequencers help manage the order in which loads are connected but do not inherently protect against overloads. Overload protection devices may refer more broadly to a category of devices designed to prevent overloads; however, in practical applications within electrical systems, circuit breakers are the standard for effectively controlling load connections and ensuring safety.