What is the primary function of regulators in power distribution?

The primary function of regulators in power distribution is to maintain a constant voltage on the main distribution line. Regulators are designed to ensure that the voltage levels remain stable, regardless of fluctuations in load or input voltage. This stability is crucial for delivering reliable power to consumers and maintaining the functionality of electrical devices and systems.

When the load on the distribution line changes, it can cause voltage variations that may lead to under-voltage or over-voltage conditions. Regulators automatically adjust the output voltage to keep it within specified limits, enhancing the overall efficiency and reliability of the power distribution system. This process not only protects connected equipment but also ensures that the utility meets regulatory standards for voltage supply consistency.

Other options address different functions that are not the primary role of regulators. For instance, increasing voltage pertains to step-up transformers, while converting AC to DC is the role of rectifiers, and preventing overload typically involves circuit breakers or fuses. Each of these devices serves distinct purposes within the power distribution framework, separate from the voltage regulation process.