DPA 500 UL 480V ABB is likely a product name or model number of an electrical power supply system manufactured by ABB, a multinational corporation specializing in robotics, power, and automation technology.
Based on the naming convention, it seems to be a power supply system with a capacity of 500 kilowatts (kW) that operates at 480 volts (V) according to the Underwriters Laboratories (UL) safety standards.
UL is a safety certification organization that tests and certifies products for safety and compliance with various standards and regulations.
DPA may stand for “Distributed Power Architecture,” which is a power system architecture used to provide high availability and redundancy in critical power applications.