Main Power Supply (PLN)

The main power supply (PLN) refers to the primary electrical connection provided by the national electricity provider to a commercial building. It serves as the core source of power for daily operations, supporting lighting, HVAC systems, elevators, office equipment, and other essential building functions. In commercial properties, a stable and adequately sized PLN power supply is critical and is typically integrated with backup systems such as generators, UPS, and emergency power systems to ensure reliability and operational continuity.