Can high voltage energy be stored if one phase is missing

Typically, a phase loss is caused by a blown fuse, thermal overload, broken wire, worn contact or mechanical failure. If the utility transformer really is Delta-Wye (often a utility will use wye-wye), then when one phase is lost, the remaining two phases power all _three_ transformer legs. One leg is fully powered, and the other two legs are placed electrically in series. Most I'm familiar with look at voltage in all three phases, but if motors make up a sizeable percentage of the load, loss of a phase may not be detected, depending on setpoints and technology used. There's no standard that I'm aware of so I think you will need to get documentation on the specific. This application note presents a method for storing energy at high voltage (−72 V) to significantly reduce size and cost. The high voltage energy storage technique is especially applicable to ATCA systems where up to 2.