Cesar A. Luongo - San Francisco CA
Franz Josef Unterlass - Adelsdorf,
Bechtel Enterprises Inc. - San Francisco CA
Siemens Aktiengesellschaft - Munich
A shunt connected superconducting energy management system (SEMS) is provided at a single switched connection between a utility grid and one or more power sensitive loads such as a semiconductor manufacturing plant having power requirements in the range on the order of 2 megawatts (MW) to 200 MW. When a voltage disturbance is sensed in the grid, power control circuitry acts to simultaneously isolate the load and the SEMS from the grid using a single switch which simultaneously provides full back up power to the load instantaneously without voltage transients or disturbances.