What is the primary function of electrical circuit breakers?

The primary function of electrical circuit breakers is to prevent overheating of conductors or insulation. Circuit breakers are essential safety devices designed to automatically interrupt the flow of electricity in the event of a fault, such as an overload or short circuit. When excessive current flows through the circuit, it can cause wires to heat up, potentially leading to insulation failure, wire damage, or even a fire. By tripping and breaking the circuit, these devices effectively mitigate the risk of overheating, safeguarding both the electrical system and the users.

While voltage regulation, improving energy efficiency, and minimizing electrical noise are important aspects in electrical systems, they are not the primary functions of circuit breakers. Circuit breakers do not regulate voltage or improve energy efficiency directly; their main role remains focused on protecting the circuit from damage due to excessive current.