Mainline stabilizers, often referred to as mainline voltage stabilizers or mainline voltage regulators, are devices designed to maintain a consistent and stable voltage level in electrical power supply systems. This stability is crucial for the proper functioning of electronic equipment, machinery, and other devices that rely on a steady power supply. Mainline stabilizers play a critical role in ensuring a stable and reliable power supply, especially in areas where voltage fluctuations are common or where sensitive equipment is in use.