What is the purpose of overcurrent protection devices?

Overcurrent protection devices serve a critical role in electrical systems by preventing excessive current flow, which can lead to overheating. When the current in an electrical circuit exceeds its rated capacity due to overloads or short circuits, it creates excessive heat. This heat can damage wiring, equipment, or even lead to fires. Overcurrent protection devices, such as fuses and circuit breakers, are designed to interrupt the circuit under these conditions, effectively mitigating the risk of thermal damage and enhancing safety. These devices act swiftly to disconnect power, maintaining the integrity of the electrical system and ensuring that it operates safely within its design limits. Thus, the primary purpose of overcurrent protection devices is to protect both people and equipment from the dangers associated with excessive current.