The source of electric power of the required capacity and quality for an Emergency Power Supply System (EPSS), including all the related electrical and mechanical components of the proper size and/or capacity required for the generation of the required electrical power at the EPS output terminals. For rotary energy converters, components of an EPS include: prime mover, cooling system, generator, excitation system, starting system, control system, fuel system, and lube system (if required).
