Patent ID: 9684028
Date: 2017-06-20
CPC Classifications: G01D,G01R,G06Q,Y04S

Claim:
1. A system for monitoring and reporting on performance of a plurality of electrical appliances that receive electrical power from an electrical system having at least two branch circuits on different phases of the electrical system, the system comprising: a first monitoring unit that interfaces with a first branch circuit of the electrical system, the first monitoring unit comprising: a second monitoring unit that interfaces with a second branch circuit of the electrical system, the second monitoring unit comprising wherein the first control component of the first monitoring unit and the second control component of the second monitoring unit coordinate timing of application of the first electrical load of the first monitoring unit and application of the second electrical load of the second monitoring unit, and wherein the first control component and the second control component use information describing the first voltages and the second voltages to calibrate the system and, based on calibration, the first control component causes the first voltage measuring unit to measure first changes in voltage between lines of the first branch circuit without the application of the first electrical load and the second control component causes the second voltage measuring unit to measure second changes in voltage between lines of the second branch circuit without the application of the second electrical load, the first and second changes in voltage characterizing performance of an electrical appliance receiving electrical power from the electrical system.