Which device protects loads served for that breaker?

The circuit breaker is a crucial device in electrical systems designed to protect electrical loads served by that breaker. Its primary function is to automatically interrupt the electrical flow in the event of an overload or short circuit. This mechanism prevents excessive current from flowing through the circuit, thereby safeguarding devices and wiring from potential damage caused by overheating or fire.

When a fault occurs—such as when too many devices are drawing power or a short circuit happens—the circuit breaker detects this change in current and trips, cutting off the electrical supply. This action minimizes the risk of damage to electrical components and enhances safety within the electrical system.

While other devices also play roles in protecting different aspects of electrical systems, the circuit breaker specifically addresses overcurrent situations and provides a means for manual control by allowing users to reset the breaker once the issue is resolved.