Network managers demand continuous availability from its UPS systems. One way a UPS system can help ensure continuous availability is to include redundant (or "extra") components within its chassis. The most vital component in a 3-phase UPS is its power module. When the UPS is on, the power module is continuously delivering conditioned power to connected equipment. Modular E3 Series 3-Phase UPS Systems features multiple, redundant 20 kVA power modules—each sharing an equal percentage of the load. One power module can be removed for maintenance (in a fully-powered, hot-swap condition) and the other power modules will automatically share support of the load. No user action is required to shift support of the load to the redundant power module(s). IMPORTANT NOTE! GUARD AGAINST UPS SYSTEM OVERLOAD!  The UPS system can only provide redundancy in 20 kVA increments. If the load is within 20 kVA of the UPS system's maximum capacity and one power module is removed for maintenance, the remaining power modules will be overloaded and the UPS system will shut down. Using the 80 kVA UPS illustration shown in the accompanying slide: if the load was 70 kVA (instead of 60 kVA) and one power module was removed, the remaining 60 kVA of power modules would be unable to support the 70 kVA load.