What is the main function of a current limiter in an electrical system?

The primary function of a current limiter in an electrical system is to prevent overload by limiting the amount of current that can flow through a circuit. This is crucial in protecting components and equipment from damage due to excessive current, which can lead to overheating and potential failures. By ensuring that the current stays within safe limits, a current limiter helps maintain the integrity and longevity of electrical systems.

The other options do not accurately describe the role of a current limiter. Increasing voltage during peak loads is unrelated since that aspect pertains more to voltage regulation rather than limiting current. Isolating circuits refers to separating them for maintenance or safety purposes, which is not the function of a current limiter. Enhancing circuit efficiency typically involves optimizing the performance of the system, which is not the specific role of a current limiter. Therefore, the main function remains centered on safeguarding the system against overload by controlling current flow.