The Atlas-Megawatt is a portable load bank that has been developed to offer the manufacturers, distributors and users of big AC power supplies and UPS systems with an adequate testing capability. The unit generates resistive load of up to 1,000 kW at both 240 V 3-phase and 480 V 3-phase. It can be used to all AC voltages ranging up to 480 V AC, between 50 Hz up to 400 Hz, and either in single phase or in 3-phase. It has a rated load step resolution of 5 kW.