X Development LLC

Shuyu Wang

Leo Francis Casey

Joel Fraser Atwater

Siyuan Xin

C O Lee Boyce, Jr

Peter Evans

Raymond Daly

Methods, systems, and apparatus, including computer programs stored on a computer-readable storage medium, for obtaining a reference phase signal that is synchronized with an alternating current (AC) phase of a multi-phase electrical power distribution system. The apparatus obtains output signals from sensors, each output signal representative of an electromagnetic emission detected by a respective sensor. The apparatus identifies, based on comparing respective phases of the output signals to the reference phase signal, a particular AC phase of the multi-phase electrical power distribution system associated with a source of the emissions. The apparatus provides an indication of the particular AC phase to a user.

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Mountain View, CA, United States of America

Shuyu Wang