Advances in Large Corporation computing, storage technologies, an increasing power demand, requires a change in Large Corporation power protection technology. Symmetra PX 40000VA, three phase input/ three phase output (3:3), is a single unit, composed of modular components. This modular architecture provides the foundation of building and scaling near-continuous availability power systems with a flexible range of power capacity. The Symmetra PX 40000VA packages the high availability requirements of easy power and runtime scalability into a very small footprint. Combined with the complete line of APC datacenter protection software and accessories it provides the four most critical elements of total datacenter protection.