If a power transformer does not have auto tap changing underload equipment, what is usually necessary to install?

When a power transformer does not come equipped with auto tap changing underload (ATC) equipment, it typically lacks the ability to adjust its voltage levels automatically to maintain the desired output under varying load conditions. Consequently, voltage regulators become essential in this scenario.

Voltage regulators are devices designed to automatically maintain a constant voltage level. They compensate for fluctuations in load current that would otherwise cause voltage levels to drop or rise significantly from what is desired. By integrating voltage regulators with the transformer system, the operator can ensure that the output voltage remains stable, despite the changes in demand placed on the transformer.

This adjustment is crucial in power distribution systems, where consistent voltage levels are necessary for the proper operation of various electrical equipment. Without such regulation, transformers could experience voltage swings that could lead to inefficiencies or even damage to connected devices. This makes the installation of voltage regulators a critical necessity when a transformer lacks the auto tap changing underload feature.